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Asked/Added Questions From NCERT: Science


Question 1. Asked on :13 July 2019:04:06:42 PM

Find a quadratic polynomial whose sum of zero is 

14 and product of zero is -1.

-Added by Master Mind Science » Quadratic Polynomials

Answer:

Master Mind

Given that: 

α + β = 14  and αβ = -1 

α + β = 14 = -ba ..........(i)

αβ = -1 or αβ = -44 = ca  ....... (ii) 

On comparing both equations we have,

a = 4, b = -1 and c = - 4 

using general quadratic polynomial 

ax2 + bx + c 

⇒ 4x2 + (-1)x + (-4) 

⇒ 4x2 - x - 4 Answer 

-Answered by Master Mind On 13 July 2019:04:50:14 PM


Question 2. Asked on :12 July 2019:06:32:02 PM

How to obtained coal gas ?

-Added by Nishant Nishant Science » Science

Answer:

nisha sheikh

 coal gas , gaseous mixture -mainly methane , carbon monodioxide and hydrogen- formed by the destructive distillation of bituminous fuel and used as a fuel. sometime steam is added to react with a hot coke, thus increasing the yield of gas.

-Answered by nisha sheikh On 13 July 2019:07:34:09 PM


Question 3. Asked on :12 July 2019:06:29:06 PM

q. what are exhaustible and Inexhaustible natural Resources example ?

 

-Added by Nishant Nishant Science » Science Questions


Question 4. Asked on :12 July 2019:06:26:12 PM

 Q what are Fossifuels give examples ?

-Added by Nishant Nishant Science » Chapter 5

Answer:

nisha sheikh

 fossilfuels are fuels that come from old life forms that decomposed over a long period of time. the major three types of fossilfuels are oil, natural gas and coal.

-Answered by nisha sheikh On 12 July 2019:08:30:41 PM


Question 5. Asked on :12 July 2019:10:17:40 AM

 What is the largest Gland of the body?

-Added by Akki chauhan Science » Life Processes

Answer:

Himanshi Verma

 Liver is the largest gland of the body.

-Answered by Himanshi Verma On 12 July 2019:07:03:58 PM


Question 6. Asked on :12 July 2019:10:14:42 AM

 Write the P.H value of Gastic juice?

-Added by Akki chauhan Science » Life Processes

Answer:

Himanshi Verma

 The pH value of gastric juice is 1.5 to 3.5.

-Answered by Himanshi Verma On 12 July 2019:06:56:58 PM


Question 7. Asked on :12 July 2019:10:13:12 AM

 Describe the work of Heart?

-Added by Akki chauhan Science » Life Processes

Answer:

Nishant Nishant
Ans. About 60,60,00,000 reuslt (0.74 seconds)                                                                                                                      The pumping of the heart is controlled by special fibres that conduct electrical signals to the various chambers. The right side of the heart pumps the blood to the lungs, where it receives oxygen. Blood enters the left side of the heart from the lungs and the heart pumps the oxygen-rich blood around the body. 

-Answered by Nishant Nishant On 12 July 2019:06:04:01 PM


Question 8. Asked on :12 July 2019:10:07:31 AM

 What is nephron? Write its function.

-Added by Akki chauhan Science » Life Processes

Answer:

Himanshi Verma

 The is the basic structural unit of kidney.the nephron uses for mechanism to convert blood into urine. its function is filtration, reabsorption, secretion, and excretion of numerous substances.

-Answered by Himanshi Verma On 12 July 2019:06:59:00 PM


Question 9. Asked on :12 July 2019:12:06:49 AM

जैव आवर्धन क्या है ? 

-Added by Master Mind Science » पर्यावरण

Answer:

Master Mind

आहार श्रृंखला में जीव एक दुसरे का भक्षण करते हैं | इस प्रक्रम में कुछ हानिकारक रासायनिक पदार्थ आहार श्रृंखला के माध्यम से एक जीव से दुसरे जीव में स्थान्तरित हो जाते हैं | इसे ही जैव आवर्धन कहते हैं | 

अन्य शब्दों में, आहार श्रृंखला में हानिकारक पदार्थों का एक जीव से दुसरे जीव में स्थानांतरण ही जैव आवर्धन कहलाता है | 

-Answered by Master Mind On 12 July 2019:12:08:40 AM


Question 10. Asked on :11 July 2019:09:29:42 PM

दोहरा परिसंचरण क्या है ? 

-Added by Master Mind Science » परिसंचरण तंत्र

Answer:

Master Mind

मनुष्य को हृदय (heart) को दो बार पम्प कर रक्त को ह्रदय से बाहर भेजना पड़ता है | एक बार दांया आलिन्द रक्त को पुरे शरीर से इक्कठा कर दांया निलय को भेजता है जिसे दांया निलय फुफ्फुस धमनी के द्वारा ऑक्सीजन युक्त होने के लिए फेंफडे तक पहुँचाता है फिर वायां आलिन्द उस ऑक्सीजन युक्त रक्त को इक्कठा कर वायां निलय को भेजता है जिसे वायां निलय पंप कर पुरे शरीर तक पहुँचाता है | इस दौरान ह्रदय को दो बार रक्त को ह्रदय आना पड़ता है अर्थात परिसंचरण करना पड़ता है | इसे ही दोहरा परिसंचरण कहते है |  

-Answered by Master Mind On 11 July 2019:09:33:04 PM


Question 11. Asked on :10 July 2019:11:26:44 PM

Why the sky looks blue in the day? Give reasons.

-Added by ATP Admin Science » Scattering Of Light

Answer:

ATP Admin

Our atmosphere is fulled with particles which scatter the light coming from the sun. In this scattering the sun light all other colour of the sun light scatter completely but blue colour remain in our atmosphhere this is the reason that our sky looks blue. 

-Answered by ATP Admin On 10 July 2019:11:29:53 PM


Question 12. Asked on :09 July 2019:01:11:36 AM

Name The Structural Formula.

-Added by ATP Admin Science » Carbon And Its Compound


Question 13. Asked on :09 July 2019:12:32:25 AM

What is commutator? 

-Added by ATP Admin Science » Electric Motor

Answer:

ATP Admin

Commutator is a device which is used to reverse the direction of the flowing of the electric current. split ring is a such device which works as commutator in a electrical motor.  

-Answered by ATP Admin On 09 July 2019:12:35:25 AM


Question 14. Asked on :08 July 2019:11:36:06 PM

Write the principle of electric motor. Explain it with the help of diagram. 

-Added by ATP Admin Science » Electric Motor

Answer:

ATP Admin

Principle of electric motor: 

An electric motor works on the principle that a current carrying conductor experiences a force when placed in a magnetic field. If the direction of the magnetic field and that of the direction of a current which pass through the magnetic field are mutually perpendicular then the direction of the force is given by Fleming's left-hand rule. Electric motor convert the electrical energy to mechanical energy. 


-Answered by ATP Admin On 08 July 2019:11:39:15 PM


Question 15. Asked on :08 July 2019:11:23:45 PM

Draw a labeled diagram of electric motor. 

-Added by ATP Admin Science » Electric Motor

Answer:

ATP Admin

 

electric-motor

-Answered by ATP Admin On 08 July 2019:11:30:49 PM


Question 16. Asked on :07 July 2019:09:47:47 AM

Write the  plant hormones and their function ?

-Added by Nishant Verma Science » Control And Coordination

Answer:

Himanshi Verma

 Plant hormones are :-

1. Auxins= It helps in cell elongation. 

2. Gibberellins= It helps in growth of stem. 

3. Cytokinins= It promote cell division.

4. Abscisic Acid = It inhibit growth. Its effect include wilting of leaves.

5. Ethylene= It help in ripening of fruits.


-Answered by Himanshi Verma On 08 July 2019:04:46:31 PM


Question 17. Asked on :06 July 2019:10:09:34 AM

What is melting point and boiling point?

-Added by Hitesh kumar Science » Matter

Answer:

Himanshi Verma

 Melting point = The temperature at which any solid get melted is called melting point.


Boiling point= The temperature at which any liquid material get boil is called its boiling point.

-Answered by Himanshi Verma On 07 July 2019:08:24:27 AM


Question 18. Asked on :06 July 2019:09:56:58 AM

 Write the various of excretion in plant ?

-Added by Akki chauhan Science » Life Process

Answer:

Himanshi Verma

 Oxygen is a by product generated during photosynthesis, exits through stomata root cell walls and other routs. Plants can get rid of excess water by transportation. Plants also excrete some waste substances into the soil around them.

-Answered by Himanshi Verma On 07 July 2019:09:24:57 AM


Question 19. Asked on :06 July 2019:09:55:56 AM

 Describe the mechanism of urine formation ?

-Added by Akki chauhan Science » Life Process

Answer:

Himanshi Verma

 Urine formation begins with the delivery of blood to the glomerulus  followed by its filtration past the glomerular barrier. The filtered portion of plasma continues through the nephron whereas the unfiltered portion passes into the peritubular capillaries.

-Answered by Himanshi Verma On 07 July 2019:09:29:46 AM


Question 20. Asked on :06 July 2019:09:54:27 AM

 Name three causes that reduce the activity of kidney ?

-Added by Akki chauhan Science » Life Process


Question 21. Asked on :06 July 2019:09:46:45 AM

 Name the process by which amoeba take food ?

-Added by Akki chauhan Science » Life Process

Answer:

Himanshi Verma

 The process by which amoeba takes its food is Endocytosis.

-Answered by Himanshi Verma On 06 July 2019:07:14:48 PM


Question 22. Asked on :06 July 2019:09:43:04 AM

Explain the process of alimentary canal ?

-Added by Akki chauhan Science » Life Process

Answer:

Himanshi Verma

 The alimentary canal is mainly referred to as the pathway by which food enters our body. It is a tube like structure  which starts from  the mouth and ends at the Large intestine. The alimentary canal plays a primary role in the human digestion process and is also termed as the digestive tract.

-Answered by Himanshi Verma On 07 July 2019:09:36:43 AM


Question 23. Asked on :06 July 2019:09:42:14 AM

 What are Enzymes ?

-Added by Akki chauhan Science » Life Process

Answer:

Himanshi Verma

 A substance produced by a living organism which acts as a catalyst to bring about a specific biochemical reaction is called enzymes.

-Answered by Himanshi Verma On 06 July 2019:07:23:55 PM


Question 24. Asked on :06 July 2019:09:40:41 AM

What are Stomata ?  write any three uses.

-Added by Akki chauhan Science » Life Process

Answer:

Himanshi Verma
The small pores on the leaves is called stomata.

Its functions are:-

1. It helps in exchange of gases Co2, and O2.

2. Its helps in transpiration.

3. Its helps in absorption. 

-Answered by Himanshi Verma On 06 July 2019:07:16:36 PM


Question 25. Asked on :06 July 2019:09:14:23 AM

What is life process? Explain all such processes of the body. 

-Added by ATP Admin Science » Life Process

Answer:

Himanshi Verma

 The process which required for maintenance growth and required for sustain life is called life process.

The process which is body are:-

1. Excretion

2. Nutrition

3. Respiration

4. Transportation

5. Control and coordination

-Answered by Himanshi Verma On 07 July 2019:08:28:09 AM


Question 26. Asked on :05 July 2019:10:54:45 PM

 What is fibre?

-Added by ATP Admin Science » Fibres And Plastics

Answer:

ATP Admin

 A thread or filament like structure which is obtained from plants and chemical substances is called fibre. Fibres are used to make yan and fabrics.

-Answered by ATP Admin On 05 July 2019:10:59:33 PM


Question 27. Asked on :05 July 2019:09:29:03 AM

 Name the process of movement of ions into roots cells.

-Added by Akki chauhan Science » Life Process

Answer:

Himanshi Verma

 The process of movement of ions into roots cell is called active transport. 

-Answered by Himanshi Verma On 07 July 2019:08:35:56 AM


Question 28. Asked on :05 July 2019:09:27:59 AM

Name two main constitution  of urine.

-Added by Akki chauhan Science » Life Process

Answer:

ATP Admin

Urea and chloride are two main constitutions of urine. Urine is a liquid byproduct of the body which is secreted by kidney, this process is called urination and passes out through urethra.

-Answered by ATP Admin On 05 July 2019:11:07:33 PM


Question 29. Asked on :05 July 2019:09:27:26 AM

 Define Excretion.

-Added by Akki chauhan Science » Life Process

Answer:

ATP Admin

 Excrete out the waste materials from the body is called excretion. Excretion is mainly performed by kidney and skin. 

-Answered by ATP Admin On 05 July 2019:10:56:58 PM


Question 30. Asked on :05 July 2019:09:26:46 AM

 How does water rise in tall tree?

-Added by Akki chauhan Science » Life Process

Answer:

ATP Admin

In plants or trees, there is steady movement of water in root xylem, creating a column of water that is steadily pushed upwards. 

Sometimes this pressure is unlikely to be enough to move water over the heights. So the tall tree uses an another strategy to move water in the xylem upwards to the highest point of the plant body. The plant has an adequate supply of water, the water which is lost through the stomata is replaced by water from xylem vessels in the leaf. This transpiration of water molecules from the cells of leaves creates a suction which pulls water from root xylem. This process continuously helps the tall tree to movement of water upward.     

-Answered by ATP Admin On 05 July 2019:11:34:24 PM


Question 31. Asked on :05 July 2019:09:25:59 AM

 Write the function of valve of heart.

-Added by Akki chauhan Science » Life Process

Answer:

Himanshi Verma

The heart consists of four chambers. There is a valve through which blood passes before leaving each Chambers of the heart. The valves prevent the backward flow of blood.

-Answered by Himanshi Verma On 08 July 2019:05:09:22 PM


Question 32. Asked on :05 July 2019:09:25:07 AM

 Why are capillaries thin walled?

-Added by Akki chauhan Science » Life Process


Question 33. Asked on :05 July 2019:09:23:39 AM

Why the breathing rate much faster in aquatic animal than others?

-Added by Akki chauhan Science » Life Process

Answer:

ATP Admin

Aquatic animal take their breath from the oxygen dissolved in water which is less amount than that of other animal like terrestrial animal. Because of terrestrial animal breaths in much amount of oxygen. Hence aquatic animals have to take more breath than the others. So breathing rate is much faster. 

-Answered by ATP Admin On 05 July 2019:11:50:34 PM


Question 34. Asked on :05 July 2019:09:22:40 AM

 Explain the events of photosynthesis.

-Added by Akki chauhan Science » Life Process

Answer:

ATP Admin

Events of the photosynthesis is as follows:

(i) Absorption of light energy by chlorophyll.

(ii) Conversion of light energy to chemical energy and splitting of water molecules into hydrogen and oxygen. 

(iii) Reduction of carbon dioxide to carbohydrates. 

-Answered by ATP Admin On 05 July 2019:11:56:38 PM


Answer:

Akki chauhan

 (a) sugar C12H22O11

 (b) Glucose C6H12O6

 (c) Vinegar CH3COOH

 (d) Pyruvic C3H4O3

 (e) Tartaric C4H6O6

-Answered by Akki chauhan On 05 July 2019:09:13:27 AM


Question 36. Asked on :02 July 2019:07:36:04 PM

 what are Amphoteric oxides?

-Added by Rohit rajput Science » Chemical Reactions

Answer:

Akki chauhan

 An amphoteric compound is a molecule or ion that can react both as an acid and as a base many metal such as zinc , copper , tin , lead , aluminium beryllium formed amphoteric oxides.

-Answered by Akki chauhan On 05 July 2019:09:00:26 AM


Question 37. Asked on :02 July 2019:04:47:31 PM

Why the cooking utensils are made up of aluminum brass and steel?


-Added by Himanshi Verma Science » Chemistry

Answer:

Akki chauhan

 Cooking utensils are made up of metal because utensils need to conduct heat well, but also need to chemically unreactive so that they do not alter the flavor of the food . most material that conductive enough to heat evenly are to use in food preparation.

-Answered by Akki chauhan On 05 July 2019:09:05:00 AM


Question 38. Asked on :28 June 2019:10:27:18 AM

 write the chemical properties of metal ?

-Added by Akki chauhan Science » Metal And Non Metals

Answer:

Himanshi Verma

 1. Metal have high M.P and B.P.

2.  Metal are good conductor of heat and electricity.

3. Metals react with air and corrode.

-Answered by Himanshi Verma On 01 July 2019:07:31:12 PM


Question 39. Asked on :28 June 2019:10:26:10 AM

 What is thermit reaction?

-Added by Akki chauhan Science » Metal And Non Metals

Answer:

Himanshi Verma

 Thermit reaction is the reaction in which 3 parts of iron oxide and one part of aluminium is taken and ignited by burning magnesium and barium peroxide. Aluminium is reducing agent so it reduces iron oxide to molten iron.

-Answered by Himanshi Verma On 02 July 2019:07:24:36 PM


Question 40. Asked on :28 June 2019:10:26:10 AM

 What is thermit reaction?

-Added by Akki chauhan Science » Metal And Non Metals


Question 41. Asked on :28 June 2019:10:24:39 AM

What is combination reaction?

-Added by Akki chauhan Science » Chemical Reactions

Answer:

Himanshi Verma

 The reaction in which two or more substances that combined together to form a single product are known as combination reaction.

-Answered by Himanshi Verma On 02 July 2019:07:27:23 PM


Question 42. Asked on :28 June 2019:10:23:00 AM

 Write the difference between displacemeant and double displacemeant reaction?

-Added by Akki chauhan Science » Chemical Reactions

Answer:

Himanshi Verma

 Displacement reaction= Those reaction in which an atom or group of atom is replaced by another atom and group of atom are called displacement reaction.


Double Displacement reaction= These are the reaction in which exchange of ions between the reactants are called double displacement reaction.

-Answered by Himanshi Verma On 02 July 2019:07:29:42 PM


Question 43. Asked on :28 June 2019:10:21:59 AM

 What is exothermeic reaction and endothermic reaction.

-Added by Akki chauhan Science » Chemical Reactions

Answer:

Himanshi Verma

 Exothermic Reaction= The reaction in which heat is evolved and heat is produced in large amount is called exothermic reaction.


Endothermic Reaction= The reaction in heat is absorbed and heat is not produced is called endothermic reaction.

-Answered by Himanshi Verma On 02 July 2019:07:32:42 PM


Question 44. Asked on :17 June 2019:12:34:11 AM

 Name the physical quantities which can change the state of matters.

-Added by ATP Admin Science » Matters And Its States

Answer:

Himanshi Verma

 There are two physical quantities  which can change the state of matter:-

1. Temperature

2. Pressure

-Answered by Himanshi Verma On 07 July 2019:08:48:56 AM


Question 45. Asked on :08 May 2019:08:32:58 AM

 List conditions under which combustion can rake place 

-Added by Sonu kumar Science » Combustion And Flame `

Answer:

Hitesh kumar

 combustion is a process of reaction of a substance with oxygen there are 

-Answered by Hitesh kumar On 11 May 2019:08:29:25 AM


Question 46. Asked on :07 May 2019:10:15:48 AM

Write four chemical reaction 

-Added by killer master Science » Chemical And Reaction

Answer:

sonu kumar

 Chemical reactions can be categorized principally into four basic types. These do not cover all reactions though. Some, such as redox reactions may fit into more than one category.

-Answered by sonu kumar On 07 May 2019:10:17:34 AM


Question 47. Asked on :07 May 2019:10:15:48 AM

Write four chemical reaction 

-Added by killer master Science » Chemical And Reaction

Answer:

Sonu kumar

 Chemical reactions can be categorized principally into four basic types. These do not cover all reactions though. Some, such as redox reactions may fit into more than one category.

-Answered by Sonu kumar On 08 May 2019:08:41:06 AM


Question 48. Asked on :07 May 2019:10:12:40 AM

 What is chemical

-Added by Sohail royal Science » Chemical And Reaction

Answer:

sonu kumar

chemical is any substance consisting of matter. This includes any liquid, solid, or gas. A chemical is any pure substance (an element) or any mixture (a solution, compound, or gas). Chemicals occur naturally and can be made artificially.

-Answered by sonu kumar On 07 May 2019:10:14:36 AM


Question 49. Asked on :07 May 2019:08:36:02 AM

 which is liberated when metals react with aluminium?

-Added by priyanshu kumar Science » Chemical And Reaction

Answer:

Sonu kumar

  Except HNO3, Aluminum reacts with other mineral acids to form their respective salts and liberate Hydrogen gas. However with HNO3, it forms an oxide coating over the metal. It renders metal passive and protects the metal from further attack of the acid.

-Answered by Sonu kumar On 08 May 2019:08:17:51 AM


Question 50. Asked on :07 May 2019:08:28:56 AM

 Which of the following reaction takes place when aluminium react with

sodium hydroxide?

-Added by priyanshu kumar Science » Chemical And Reaction

Answer:

sonu kumar

 5 mins ago - Which of the following reaction takes place when aluminium react withsodium hydroxide? Science Chemical ... sodium hydroxide? -Added by ...

-Answered by sonu kumar On 07 May 2019:10:13:00 AM


Question 51. Asked on :06 May 2019:10:29:47 AM

 what is meant by the term 'industry?

-Added by priyanshu kumar Science » Industries

Answer:

sonu kumar

  services within an economy.he term 'industry' implies an economic activity involving goods production, mineral extraction or provision of consumer services. Industry is the production of goods or related

-Answered by sonu kumar On 06 May 2019:10:34:37 AM


Question 52. Asked on :06 May 2019:10:26:55 AM

 what is plantation agriculture?

-Added by priyanshu kumar Science » Agriculture

Answer:

sonu kumar

 Plantation agriculture is a form of commercial farming where crops are grown for profit. Large land areas are needed for this type of agriculture. Countries that haveplantation agriculture usually experience tropical climate with high annual temperatures and receive high annual rainfall.

-Answered by sonu kumar On 06 May 2019:10:30:03 AM


Question 53. Asked on :06 May 2019:08:30:55 AM

 कंप्यूटर क्या है? कंप्यूटर के 10 उपयोग लिखो

-Added by rocki kumar Science » Computer

Answer:

Sonu kumar

 Sep 9, 2018 - आज के युग में लगभग सभी लोग कंप्यूटर से परिचित होंगे क्योंकि लगभग हर जगह मतलब की सभी ऑफिस में, स्कूल में, कॉलेज में इत्यादी जगह पर कंप्यूटर का उपयोग होता है| अब तो लगभग सभी लोगो के घर में कंप्यूटर मौजूद होता है| Computer का उपयोग आजकल हर .... मौसम के बारे में पहले पता लग जाता है और उसके बाद हम मौसम के हिसाब से अपना routine बनाते हैं की आज क्या करना है, कब करना है, ... 10. Banking. बैंकिंग क्षेत्र में कंप्यूटर का इस्तेमाल अपने customer का record रखने के लिए किया जाता है| तरह तरह के ...

-Answered by Sonu kumar On 06 May 2019:08:37:01 AM


Question 54. Asked on :06 May 2019:08:25:23 AM

  

-Added by rocki kumar Science » Computer


Question 55. Asked on :06 May 2019:08:20:15 AM

 भोजन के लाभ लिखो 

-Added by rocki kumar Science » Science

Answer:

Sonu kumar

 ऐसा कोइ भी पदार्थ जो शर्करा (कार्बोहाइड्रेट), वसा, जल तथा/अथवा प्रोटीन से बना हो और जीव जगत द्वारा ग्रहण किया जा सके, उसे भोजन कहते हैं। जीव न केवल जीवित रहने के लिए बल्कि स्वस्थ और सक्रिय जीवन बिताने के लिए भोजनकरते हैं। भोजन में अनेक .

-Answered by Sonu kumar On 06 May 2019:08:30:14 AM


Question 56. Asked on :05 May 2019:08:09:48 AM

FULL form CFC 

-Added by rocki kumar Science » Science

Answer:

Hitesh kumar

 Chlorofluorocarbon(CFC) is any of various halocarbon compounds consisting of carbon, hydrogen, chlorine, and fluorine. CFC were once used widely as aerosol propellants and refrigerants.Chlorofluorocarbons are believed to cause depletion of the atmospheric ozone lay

-Answered by Hitesh kumar On 05 May 2019:08:18:33 AM


Answer:

Hitesh kumar

** भारत के राज्य और उनकी राजधानी **-----------------------------------------------------

1. बिहार - पटना

2. पश्चिम बंगाल - कोलकाता

3. असम - दिसपुर

4. आंध्रप्रदेश - अमरावती (new),  हैदराबाद (old)

5. उड़ीसा - भुवनेश्वर

6. उत्तर प्रदेश - लखनऊ

7. कर्नाटक - बंगलौर

8. केरल - तिरुवनन्तपुरम्

9. गुजरात - गांधीनगर

10. जम्मू-कश्मीर - श्रीनगर

11. तमिलनाडु - चेन्नई

12. त्रिपुरा - अगरतल्ला

13. नागालैंड - कोहिमा

14. पंजाब - चंडीगढ़

15. हरियाणा - चंडीगढ़

16. मणिपुर - इम्फाल

17. मध्यप्रदेश - भोपाल

18. महाराष्ट्र - मुंबई

19. मेघालय - शिलांग

20. राजस्थान - जयपुर

21. हिमाचल प्रदेश - शिमला

22. सिक्किम - गंगटोक

23. मिजोरम - आइजॉल

24. अरुणाचल प्रदेश - ईटानगर

25. गोवा - पणजी

26. उत्तराखंड - देहरादून

27. छत्तीसगढ़ - रायपुर

28. झारखंड - रांची

29. तेलंगाना - हैदराबाद

केंद्रशासित राज्य और उसकी राजधानी 

1.दिल्ली - नई दिल्ली

2. लक्षद्वीप - कवारत्ती

3. दमन और दीव - दमन

4. अंडमान-निकोबार - पोर्ट ब्लेयर

5. चंडीगढ़ - चंडीगढ़

6. पुदुचेरी - पुदुचेरी

7. दादर व नगर हवेली - सिलवासा

Share with your friends..........श्रीराम कोचिंग, सीकर

अमरावती

-Answered by Hitesh kumar On 05 May 2019:08:20:43 AM


Question 58. Asked on :05 May 2019:07:55:51 AM

कृषि की हानियाँ 

-Added by rocki kumar Science » Science

Answer:

Sonu kumar

 Jan 18, 2018 - तुफैल इदरीसी अमेठी: भारतीय कृषि जैविक केंद्र गाजियाबाद देश में एक बहुत बड़ी क्रांति लाने में सफल हुए हैं आज जहां किसान महंगे रासायनिक खाद कीटनाशक आदि का उपयोग करते-करते अपने खेत की मिट्टी को अनुपजाऊ कठोर और जहरीला बना ...

-Answered by Sonu kumar On 06 May 2019:08:31:46 AM


Question 59. Asked on :04 May 2019:10:30:18 AM

कृषि के फायदे क्या है

-Added by Hitesh kumar Science » Science

Answer:

Hitesh kumar

 इस भाग में संरक्षण खेती के फायदे की जानकारी दी गई है। ... का गिरना, भू-जलस्तर में गिरावट, कृषि मजदूरों में कमी व कृषि आयातों की बढ़ती कीमतों की वजह से पारम्परिक खेती के अन्तर्गत उत्पादन खर्च में वृद्धि व शुद्ध मुनाफे में कमी हो रही है।

-Answered by Hitesh kumar On 05 May 2019:08:26:53 AM


Question 60. Asked on :04 May 2019:09:55:15 AM

 What is the name of  reproduction  in which fusion of male and female gametes takes place ?  

-Added by Prince Rawat Science » Science

Answer:

rocki kumar

 Fusioiplon. During sexual reproduction, a male and female gamete will merge together to form a new organism. The two haploid cells will fuse together to form a did cell called a zygote.

-Answered by rocki kumar On 04 May 2019:10:01:56 AM


Question 61. Asked on :04 May 2019:09:53:12 AM

 What are two modes by which animals reproduce?


-Added by Prince Rawat Science » Science

Answer:

rocki kumar

 Some simple animals, many of whom are single celled, reproduce asexually. The different modes of asexual reproduction in animals include gemmules (sponges),fragmentation (planarians), regeneration (echinoderms) and parthenogenesis (ants, wasps

-Answered by rocki kumar On 04 May 2019:10:03:42 AM


Question 62. Asked on :03 May 2019:10:24:23 AM

कोशिका क्या  है

-Added by ravi varma Science » Science

Answer:

sonu kumar

 कोशिका (Cell) सजीवों के शरीर की रचनात्मक और क्रियात्मक इकाई है और प्राय: स्वत: जनन की सामर्थ्य रखती है। यह विभिन्न पदार्थों का वह छोटे-से-छोटा संगठित रूप है जिसमें वे सभी क्रियाएँ होती हैं जिन्हें सामूहिक रूप से हम जीवन कहतें हैं

-Answered by sonu kumar On 03 May 2019:10:29:20 AM


Question 63. Asked on :03 May 2019:08:39:26 AM

प्रकाश की परिभाषा दीजिये?

-Added by Hitesh kumar Science » Science

Answer:

ravi varma

 यह एक प्रकार की ऊर्जा है जब प्रकाश हमारी आँख की रेटिना पर पड़ता है तो इसके रेटिना पर गिरने से दृष्टि संवेदना उत्पन्न होती है और हमें वस्तुएं दिखाई देती है। प्रकाश ...

-Answered by ravi varma On 03 May 2019:10:07:11 AM


Question 64. Asked on :03 May 2019:08:42:42 AM

 Explain asexual reproduction

-Added by killer master Science » Human Bodies

Answer:

sonu kumar

 Asexual reproduction is a type of reproduction by which offspring arise from a single organism, and inherit the genes of that parent only; it does not involve the fusion of gametes, and almost never changes the number of chromosomes. ... Many plants and fungi sometimes reproduce asexually.

-Answered by sonu kumar On 03 May 2019:10:19:01 AM


Question 65. Asked on :03 May 2019:08:36:52 AM

what do you mean by sperm are product in the male reproductive organ

-Added by killer master Science » Science Mindly Questions

Answer:

ravi varma

The internal organs of the male reproductive system, also called accessoryorgans, include the following: Epididymis: The epididymis is a long, coiled tube that rests on the backside of each testicle. It transports and stores sperm cells that are produced in the testes. 

-Answered by ravi varma On 03 May 2019:10:12:38 AM


Question 66. Asked on :03 May 2019:08:33:34 AM

 वास्पीकरण किसे कहते है ?

-Added by Hitesh kumar Science » Science

Answer:

ravi varma

 किसी तत्त्व या यौगिक का द्रव अवस्था से गैस अवस्था में परिवर्तन वाष्पीकरण (Vaporization या vaporisation) कहलाता है। वाष्पीकरण दो प्रकार का होता है- वाष्पन, तथा क्वथन। इन्हें भी देखें[संपादित करें]. वाष्पन (evaporation); क्वथन · संघनन · ऊर्ध्वपातन.

-Answered by ravi varma On 03 May 2019:10:15:48 AM


Question 67. Asked on :03 May 2019:08:34:30 AM

 प्रकाश क्या है?

-Added by killer master Science » Science Mindly Questions

Answer:

Hitesh kumar

  प्रकाश एक प्रकार की ऊर्जा है, जो विद्युत चुंबकीय तरंगों के रूप में संचारित होती है। इसका ज्ञान हमें आँखों द्वारा होता है इसका तरंग दैर्ध्य 3900 Ӑ से 7800 Ӑ के बीच होता है। प्रकाश का विद्युत चुंबकीय तरंग सिद्धांत प्रकाश के केवल ...


-Answered by Hitesh kumar On 03 May 2019:08:37:57 AM


Question 68. Asked on :03 May 2019:08:30:51 AM

 differentiate between internal fertilisation and external fertilisation

-Added by killer master Science » Science Mindly Questions

Answer:

sonu kumar

 The difference between internal and external fertilization is that internal fertilization occurs inside the body, whereas external fertilizationhappens outside the body. Fertilization is the process by which a sperm cell and an egg cell unite to form a completely new individual.

-Answered by sonu kumar On 03 May 2019:10:50:56 AM


Question 69. Asked on :03 May 2019:08:30:51 AM

 differentiate between internal fertilisation and external fertilisation

-Added by killer master Science » Science Mindly Questions

Answer:

ravi varma

 The difference between internal and external fertilization is that internal fertilization occurs inside the body, whereas external fertilizationhappens outside the body. Fertilization is the process by which a sperm cell and an egg cell unite to form a completely new individual.

-Answered by ravi varma On 03 May 2019:10:23:30 AM


Question 70. Asked on :03 May 2019:08:29:05 AM

 What is metamorphosis ? give example

-Added by killer master Science » Science Mindly Questions

Answer:

sonu kumar

 MetamorphosisMetamorphosis, in biology, striking change of form or structure in an individual after hatching or birth. ... Examples of metamorphosis include the tadpole, an aquatic larval stage that transforms into the land-dwelling frog (class Amphibia).

-Answered by sonu kumar On 03 May 2019:10:32:07 AM


Answer:

sonu kumar

 क्या सभी जीवों को एक ही किस्म के भोजन की आवश्यकता होती है? Answer: नही, सभी जीवों को एक ही किस्म के भोजन की आवश्यकता नही होती है विभिन्न तरह के जीवों को विभिन्न तरह के भोजन कि आवश्यकता होती है। जैसे: शाकाहारी जीव 

-Answered by sonu kumar On 03 May 2019:10:27:39 AM


Question 72. Asked on :03 May 2019:08:25:32 AM

 Describe the process fertilisation in human beings

-Added by killer master Science » Science Mindly Questions

Answer:

ravi varma

 Human fertilization is the union of a human egg and sperm, usually occurring in the ampulla of the fallopian tube. The result of this union is the production of a zygote cell, or fertilized egg, initiating prenatal development. ... The process of fertilizationinvolves a sperm fusing with an ovum.

-Answered by ravi varma On 03 May 2019:10:32:12 AM


Question 73. Asked on :03 May 2019:08:25:32 AM

 Describe the process fertilisation in human beings

-Added by killer master Science » Science Mindly Questions

Answer:

rocki kumar

 17अक्टूबर1887

-Answered by rocki kumar On 04 May 2019:08:21:07 AM


Question 74. Asked on :02 May 2019:10:09:06 AM

समांगी और विस्मांगी में अन्तर स्पस्ट कीजिए  

-Added by ravi varma Science » Science

Answer:

priyanshu kumar

  समांगी मिश्रण : ऐसे मिश्रण जिसमें दो या दो से अधिक अवयव उपस्थित होते हैं किंतु उंहें अलग-अलग देखा नहीं जा सकता उन्हें समांगी मिश्रण कहते हैं। उदाहरण : नमक और पानी का मिश्रण. विषमांगी मिश्रण : ऐसे मिश्रण जिनमें दो या दो से ...

-Answered by priyanshu kumar On 02 May 2019:10:56:10 AM


Question 75. Asked on :30 April 2019:09:55:52 AM

 What do you mean by non- metals

-Added by Sohail alam Science » Science Mindly Questions

Answer:

priyanshu kumar

  Nonmetal or non-metal is a chemical element thatdoes not have the properties of a metal. ... Usually, gases or brittle solids are non-metals. Elements on the periodic table can be classified as metal, semimetal, or non-metal. Five times more elementsare metals than nonmetals.

-Answered by priyanshu kumar On 02 May 2019:10:58:43 AM


Question 76. Asked on :27 April 2019:08:22:53 AM

 explain the differences between pure air and polluted air


-Added by Sohail alam Science » Pollution

Answer:

Hitesh kumar

 These steps, as well as many others, are things we all can do to help reduce air pollution. Conserve energy – remember to turn off lights, computers, and electric appliances when not in use. Use energy efficient light bulbs and appliances. Participate in your local utility's energy conservation programs

-Answered by Hitesh kumar On 27 April 2019:08:28:20 AM


Question 77. Asked on :27 April 2019:08:23:14 AM

what will happen if we drink polluted water  

-Added by Hitesh kumar Science » S.s.t

Answer:

priyanshu kumar

 Drinking or swimming in unclean water can cause: Vomiting or diarrhea. A sick stomach. ... Reproductive problems (Some kinds of reproductive problems, like infertility, can happen afterdrinking polluted water for a long period of time)

-Answered by priyanshu kumar On 29 April 2019:10:36:20 AM


Question 78. Asked on :27 April 2019:08:19:35 AM

 How would the disposal of garbage etc. affects the livings organisms

in the river

-Added by Sohail alam Science » Pollution

Answer:

priyanshu kumar

 how would the disposal of garbage affect the living organisms in the river. Groundwater contamination from pesticides causes reproductive damage within wildlife in ecosystems. ... Ecosystems are destroyed by the rising temperature in the water, as coral reefs are affected by the bleaching effect due to warmer temperatures.

-Answered by priyanshu kumar On 29 April 2019:10:41:40 AM


Question 79. Asked on :27 April 2019:08:17:51 AM

What can we do to reduce air pollution

 

-Added by Sohail alam Science » Pollution

Answer:

priyanshu kumar

 These steps, as well as many others, are things we all can do to help reduce air pollution.

-Answered by priyanshu kumar On 30 April 2019:10:16:26 AM


Question 80. Asked on :27 April 2019:08:17:00 AM

Which of the following is not true

-Added by Hitesh kumar Science » S.s.t

Answer:

priyanshu kumar

 Jan 19, 2019 - Which of the following is 'NOT' true? Options: A) Teaching Is An Art. B) Teachers Can Be Trained. C) Teachers Are Born. D) All Of The Above ...


-Answered by priyanshu kumar On 29 April 2019:10:44:53 AM


Question 81. Asked on :27 April 2019:08:14:40 AM

have you heard of the ozone hole

 

-Added by Sohail alam Science » Pollution

Answer:

Sonu kumar

 Chlorofluorocarbons and ozone. Many people have heard that the ozone hole is caused by chemicals called CFCs, short for chlorofluorocarbons. CFCs escape into the atmosphere from refrigeration and propellant devices and processes. In the lower atmosphere, they are so stable that they persist for years, even decades.Oct 18, 2018

-Answered by Sonu kumar On 30 April 2019:10:16:54 AM


Question 82. Asked on :27 April 2019:08:08:05 AM

 How did the partition affect life in Delhi

-Added by Hitesh kumar Science » S.s.t

Answer:

priyanshu kumar

 Answer: The Partition of India in 1947 led to a massive transfer of populations on both sides of the new border. As a result, the population of Delhi swelled, the kinds of jobs people did changed, and the culture of the city became different. ... Thousands of people in Delhi were killed and their homes looted and burned.

-Answered by priyanshu kumar On 30 April 2019:10:26:31 AM


Question 83. Asked on :26 April 2019:08:38:06 AM

 What are the causes of hearing impairment?

-Added by priyanshu kumar Science » Sound

Answer:

Sohail alam

 Damage to the inner ear. Aging and exposure to loud noise may cause wear and tear on the hairs or nerve cells in the cochlea that send sound signals to the brain. When these hairs or nerve cells are damagedor missing, electrical signals aren't transmitted as efficiently, and hearing loss occurs.

-Answered by Sohail alam On 26 April 2019:08:43:39 AM


Question 84. Asked on :26 April 2019:08:30:23 AM

 What is noise ? Do you enjoy the sound produced by horns of buses and trucks ? why ?

-Added by priyanshu kumar Science » Sound

Answer:

Sohail alam

 The truck BHA007 features the insanely loud, india-madetruck Horns. These horns are ridiculously loud and, more importantly, actually sound like a blast! The horns are hand-tuned in the india. Simply put, they sound completely authentic. ... responsibility to comply with local noise ordinances and D.O.T. sound level laws.

-Answered by Sohail alam On 26 April 2019:08:46:36 AM


Question 85. Asked on :26 April 2019:08:27:52 AM

 Do you feel the vibrations?

-Added by priyanshu kumar Science » Sound

Answer:

priyanshu kumar

 Yes I feel the vibrations.

-Answered by priyanshu kumar On 26 April 2019:08:46:49 AM


Question 86. Asked on :26 April 2019:08:19:47 AM

 

-Added by Sohail alam Science » Science


Question 87. Asked on :25 April 2019:09:39:31 PM

Write the law of reelection?

-Added by Nitish kumar Science » Light

Answer:

Sohail alam

 Election law is a discipline falling at the juncture of constitutional law and political science. It researches "the politics of law and the law of politics". The conceptual knowledge behind election law focuses on who votes, when that person can vote, and the construction behind the tabulated totals.[1]

-Answered by Sohail alam On 26 April 2019:08:01:10 AM


Question 88. Asked on :25 April 2019:09:37:40 PM

 What is reflected rays?

-Added by Nitish kumar Science » Light

Answer:

priyanshu kumar

 An incident ray is a ray of light that strikes a surface. ... The reflected ray corresponding to a given incident ray, is the ray that represents the lightreflected by the surface. The angle between the surface normal and the reflected ray is known as the angle of reflection.

-Answered by priyanshu kumar On 26 April 2019:09:02:27 AM


Question 89. Asked on :25 April 2019:09:35:53 PM

 What is incident rays?

-Added by Nitish kumar Science » Light

Answer:

priyanshu kumar

 An incident ray is a ray of light that strikes a surface. The angle between this ray and the perpendicular or normal to the surface is the angle of incidence.An incident ray is a ray of light that strikes a surface. The angle between this ray and the perpendicular or normal to the surface is the angle of incidence.

-Answered by priyanshu kumar On 26 April 2019:08:54:16 AM


Question 90. Asked on :25 April 2019:09:34:06 PM

 What are iris ?Write the function of iris?

-Added by Nitish kumar Science » Light

Answer:

Sohail alam

 The function of iris is to control the diameter and size of the pupil and the functionof pupil is to control the amount of light that enters the eye. The primary function of the human pupil is to regulate the amount of light that enters the eye.

-Answered by Sohail alam On 26 April 2019:08:56:45 AM


Question 91. Asked on :25 April 2019:09:32:50 PM

 What is Corina?

-Added by Nitish kumar Science » Light

Answer:

priyanshu kumar

 A female given name, a variant of Corinna.

-Answered by priyanshu kumar On 26 April 2019:08:55:16 AM


Question 92. Asked on :25 April 2019:09:29:33 PM

 What is S.I unit of wave length?

-Added by Nitish kumar Science » Sound

Answer:

priyanshu kumar

 Wavelength is also measured in metres (m) - it is a length after all. The frequency, f, of a wave is the number of waves passing a point in a certain time. We normally use a time of one second, so this gives frequency the unit hertz (Hz), since one hertz is equal to one wave per second.

-Answered by priyanshu kumar On 26 April 2019:08:57:15 AM


Question 93. Asked on :25 April 2019:09:27:02 PM

 What is S.I unit of frequency ?

-Added by Nitish kumar Science » Sound

Answer:

priyanshu kumar

 Units. The SI derived unit of frequency is the hertz (Hz), named after the German physicist Heinrich Hertz. One hertz means that an event repeats once per second.

-Answered by priyanshu kumar On 26 April 2019:09:00:24 AM


Question 94. Asked on :25 April 2019:09:24:08 PM

 What is minimum audible distance from sound source to barrier medium?

-Added by Nitish kumar Science » Sound

Answer:

priyanshu kumar

 of compressions and rarefactions in the elastic medium, as illustrated by Figure 1.1(a). When .... to a distance from the source equal to about a wavelength of sound or equal to three times the .... The minimum audible level occurs at .... such as barriers and reflectors on the sound pressure level at an observation point.

-Answered by priyanshu kumar On 26 April 2019:08:58:14 AM


Question 95. Asked on :25 April 2019:09:21:16 PM

 What is minimum audible range of human ears?

-Added by Nitish kumar Science » Sound

Answer:

priyanshu kumar

 The commonly stated range of human hearing is 20 Hz to 20 kHz. Under ideal laboratory conditions,humans can hear sound as low as 12 Hz and as high as 28 kHz, though the threshold increases sharply at 15 kHz in adults, corresponding to the last auditorychannel of the cochlea.

-Answered by priyanshu kumar On 26 April 2019:09:01:00 AM


Question 96. Asked on :25 April 2019:09:17:33 PM

 What is eco sound?

-Added by Nitish kumar Science » Sound

Answer:

priyanshu kumar

 echo. An echo is a repetition or imitation of sound. When sound waves hit a hard surface they might reflect, making the sound bounce and repeat.

-Answered by priyanshu kumar On 26 April 2019:09:03:16 AM


Question 97. Asked on :25 April 2019:08:48:24 AM

what do you mean by butterfly life cycle

-Added by Sohail alam Science » G.k

Answer:

Nishant verma

ans.The LIFE-CYCLE OF A BUTTERFLYButterflies and moths undergo complete metamorphosis in which they go through four different life stages. Egg - A butterflystarts its life as an egg. Larva - The larva (caterpillar) hatches from an egg and eats leaves or flowers almost constantly. 

-Answered by Nishant verma On 25 April 2019:05:34:29 PM


Question 98. Asked on :25 April 2019:08:22:56 AM

Write the five properties of Base?

-Added by Prince Rawat Science » Acids, Bases And Salts

Answer:

Nishant verma

ans.Chemical Properties of Bases

  • Bases change the colour of litmus from red to blue.
  • They are bitter in taste.
  • Bases lose their basicity when mixed with acids.
  • Bases react with acids to form salt and water. ...
  • They can conduct electricity.
  • Bases feel slippery or soapy.
  • Some bases are great conductors of electricity.

 

-Answered by Nishant verma On 25 April 2019:05:35:46 PM


Question 99. Asked on :25 April 2019:08:18:05 AM

 What is natural acids? 

-Added by Prince Rawat Science » Acids, Bases And Salts

Answer:

Nishant verma

 ans. Nitric acid, sulfuric acid, hydrocloric and all organic acids. ... They all can be created naturaly, though not all of them exist in nature as acid, becouse some of them react imediately with its suroundings or is unstable in some way. You could say there is some sort of fancy acid .

-Answered by Nishant verma On 25 April 2019:05:38:09 PM


Question 100. Asked on :25 April 2019:08:20:12 AM

What do you mean by natural gas ?

 

-Added by Sohail alam Science » G.k

Answer:

Nishant verma

 ans.

natural gas

flammable gas, consisting largely of methane and other hydrocarbons, occurring naturally underground (often in association with petroleum) and used as fuel.

-Answered by Nishant verma On 25 April 2019:05:45:42 PM


Question 101. Asked on :25 April 2019:08:12:59 AM

how will she find the nature of the gas?

-Added by Sohail alam Science » G.k

Answer:

Sonu kumar

 Mar 22, 2018 - Saloni took a piece of burning charcoal and collected the gas evolved in a test tube. How will she find the nature of the gas? Write down word ...

-Answered by Sonu kumar On 30 April 2019:10:26:14 AM


Question 102. Asked on :25 April 2019:08:12:59 AM

how will she find the nature of the gas?

-Added by Sohail alam Science » G.k

Answer:

priyanshu kumar

 Mar 22, 2018 - Saloni took a piece of burning charcoal and collected the gas evolved in a test tube. How will she find the nature of the gas? Write down word ...


-Answered by priyanshu kumar On 30 April 2019:10:19:44 AM


Question 103. Asked on :25 April 2019:08:12:59 AM

how will she find the nature of the gas?

-Added by Sohail alam Science » G.k

Answer:

Sonu kumar

 question_answer 1) Saloni took a piece of burning charcoal and collected the gas evolved in a test tube. (a) How will she find the nature of the gas? (b) Write ...

-Answered by Sonu kumar On 30 April 2019:10:22:29 AM


Question 104. Asked on :25 April 2019:08:04:53 AM

Give reasons


aluminium foils are used to wrap foods item




-Added by Sohail alam Science » G.k

Answer:

Nishant verma

 ans.Aluminium foils are used to wrap food items because aluminium being a soft malleable metal it can be beaten to in sheets to form thin wrapping sheets. Moreover it does not react with food items. Immersion rods are made of metallic substances metals are good conductors of heat and electricity.

-Answered by Nishant verma On 25 April 2019:05:53:30 PM


Question 105. Asked on :25 April 2019:08:06:52 AM

 Do you see any waves there?

-Added by priyanshu kumar Science » Sound

Answer:

priyanshu kumar

 Aug 21, 2013 - Alpha waves are rhythmical electrical fields generated in the brain. ... So why don't we see something roughly 10 times every second? ... well, showing that there is a frequency correspondence does not suffice, one would ...


-Answered by priyanshu kumar On 30 April 2019:10:24:33 AM


Question 106. Asked on :24 April 2019:08:26:41 AM

 name two natural causes of deforestation.

-Added by Sohail alam Science » Conservation Of Plant And Animals

Answer:

rocki kumar

 Apr 23, 2019 - Give an example of plant that belongs to group Bryophyta? ... Chapter 12 Reproduction In Plants (3) ... Conservation Of Plant And Animals (1).


-Answered by rocki kumar On 04 May 2019:08:27:07 AM


Question 107. Asked on :23 April 2019:09:51:51 AM

 Give to examples of plants that belongs it group angiosperm?

-Added by Nitish kumar Science » ORGANISATION IN THE LIVING WORLD

Answer:

Sohail alam

 some examples of angiosperms are as follows: Apple (Malus pumila) Brinjal (Solanum melongena) Guava (Psidium guajava) Jackfruit (Artocarpus heterophyllus) Litchi (Litchi chinensis) Mango (Mangifera indica) Papaya (Carica papaya) Pea (Pisum sativum)

-Answered by Sohail alam On 24 April 2019:08:08:20 AM


Question 108. Asked on :23 April 2019:09:49:28 AM

 Hoe male cone of pinus is different from female cone of pinus?

-Added by Nitish kumar Science » ORGANISATION IN THE LIVING WORLD

Answer:

Sohail alam

 Female pine cones hold the seeds whereas male pine cones contain the pollen. Most conifers, or cone-bearing trees, have female and male pine cones on the same tree. A female pine cone, also called a megasporangiate strobilus, consists of cone or seed scales that hold two ovules, the unfertilized seeds.

-Answered by Sohail alam On 24 April 2019:08:11:06 AM


Question 109. Asked on :23 April 2019:09:48:26 AM

 What are cones in pinus?

-Added by Nitish kumar Science » ORGANISATION IN THE LIVING WORLD

Answer:

Sohail alam

 A cone (in formal botanical usage: strobilus, plural strobili) is an organ on plants in the division Pinophyta (conifers) that contains the reproductive structures. The familiar woody cone is the female cone, which produces seeds.

-Answered by Sohail alam On 24 April 2019:08:18:29 AM


Question 110. Asked on :23 April 2019:09:46:44 AM

 Give an example of plant that belongs to group Bryophyta?

-Added by Nitish kumar Science » ORGANISATION IN THE LIVING WORLD

Answer:

rocki kumar

 The king was told that in order to decide the right time for doing something, it was necessary to look into the future. Since only magicians could do so, he wasadvised to go to magicians

-Answered by rocki kumar On 05 May 2019:08:45:31 AM


Question 111. Asked on :23 April 2019:09:41:58 AM

Give one identifying feature of group which Spirogyra belongs?

-Added by Nitish kumar Science » ORGANISATION IN THE LIVING WORLD Fdsg

Answer:

priyanshu kumar

 Mar 27, 2018 - Mention the shape of chloroplast in spirogyra give one identifying feature of the group to which spirogyra belongs.

-Answered by priyanshu kumar On 30 April 2019:10:31:48 AM


Question 112. Asked on :23 April 2019:09:40:51 AM

 What is the biological name of mushroom ?

-Added by Nitish kumar Science » ORGANISATION IN THE LIVING WORLD

Answer:

Sohail alam

 Basidiomycota, The biological name of mushroom

-Answered by Sohail alam On 24 April 2019:08:12:29 AM


Question 113. Asked on :23 April 2019:09:38:37 AM

 What is common name for Funaria and Dryopteris?

-Added by Nitish kumar Science » ORGANISATION IN THE LIVING WORLD

Answer:

rocki kumar

 - What is common name for Funaria and Dryopteris? Science ORGANISATION IN THE LIVING ... Mathematics (100) · General Knowledge (387).


-Answered by rocki kumar On 08 May 2019:08:10:58 AM


Question 114. Asked on :23 April 2019:09:36:45 AM

 Alga belongs to which group ?

-Added by Nitish kumar Science » ORGANISATION IN THE LIVING WORLD

Answer:

Sonu kumar

 Algae, singular alga, members of a group of predominantly aquatic photosyntheticorganisms of the kingdom Protista. Algae have many types of life cycles, and they range in size from microscopic Micromonas species to giant kelps that reach 60 metres (200 feet) in length

-Answered by Sonu kumar On 02 May 2019:10:11:33 AM


Question 115. Asked on :23 April 2019:07:47:27 AM

what is organ 

-Added by Sohail alam Science » Science Mindly Questions

Answer:

Sonu kumar

 a part of an organism which is typically self-contained and has a specific vital function.

-Answered by Sonu kumar On 02 May 2019:10:26:45 AM


Question 116. Asked on :22 April 2019:03:57:11 PM

 What is carbon 

-Added by Sohail alam Science » Science

Answer:

Sonu kumar

 Carbon is a chemical element, like hydrogen, oxygen, lead or any of the others in the periodic table. Carbon is a very abundant element. It exists in pure or ...

-Answered by Sonu kumar On 02 May 2019:10:23:55 AM


Question 117. Asked on :22 April 2019:03:55:52 PM

 Write three elements of gases


-Added by Sohail alam Science » Science


Question 118. Asked on :22 April 2019:03:55:00 PM

 What is force

-Added by Sohail alam Science » Science

Answer:

Sonu kumar

 What is force? This definition explains what force is in the physical sciences and discusses its properties.

-Answered by Sonu kumar On 02 May 2019:10:29:27 AM


Question 119. Asked on :22 April 2019:03:51:55 PM

What do you mean by growth hormone  

-Added by Sohail alam Science » Science

Answer:

sonu kumar

 tation agriculture is a form of commercial farming where crops are grown for profitLarge land areas are needed for this type of agricultureCountries that have plantation agriculture usually expePlanrience high annual temperatures and receive high annual rainfallPlantation agriculture as mentioned above was introduced ...

-Answered by sonu kumar On 06 May 2019:10:32:15 AM


Question 120. Asked on :22 April 2019:03:48:16 PM

What is human


-Added by Sohail alam Science » Science Mindly Questions

Answer:

Sonu kumar

 As far as we know, human beings are the only creatures on earth that possess a brain developed to such an extent that they can ask this question of themselves: ...


-Answered by Sonu kumar On 02 May 2019:10:35:37 AM


Question 121. Asked on :22 April 2019:09:58:08 AM

A metal cylinder is melted and the whole mass is cast in the shape of a cube. What happens to its density? Give reasons. 

-Added by Nitish kumar Science » FORCE

Answer:

Hitesh kumar

 Density is constant for given substance or material. So, when it is cast into different shapes, the density of the material remains same as before.


Density is defined as the mass of the substance per unit volume. 


Density = Mass / Volume.


Mass of the metal cylinder and that of the cube will be same when measured via spring balance experiment. 


Mass of water displaced in both cases doesn't change. 


Similarly, volume of the water displaced in the measuring unit of the spring balance remains same in both the scenario.


So, density remains same. 



-Answered by Hitesh kumar On 22 April 2019:03:24:11 PM


Question 122. Asked on :22 April 2019:09:56:43 AM

 At which temperature the density of water is maximum?

-Added by Nitish kumar Science » FORCE

Answer:

Sohail alam

 39 °F

Answer: When cooled from room temperature liquid water becomes increasingly dense, as with other substances, but at approximately 4 °C (39 °F), pure water reaches its maximum density. As it is cooled further, it expands to become less 

-Answered by Sohail alam On 22 April 2019:03:28:08 PM


Question 123. Asked on :22 April 2019:09:55:34 AM

 What would be the unit of displaced weight of liquid?

-Added by Nitish kumar Science » FORCE

Answer:

rocki kumar

 The mass of the displaced fluid can be expressed in terms of the density and its volume, m = ρV. The fluid displaced has aweight W = mg, where g is acceleration due to gravity. Therefore, the weight of the displaced fluid can be expressed as W = ρVg.

-Answered by rocki kumar On 08 May 2019:08:22:19 AM


Question 124. Asked on :22 April 2019:09:53:13 AM

 When happens when we immerse an object in bucket of water which is not filled to the brim?

-Added by Nitish kumar Science » FORCE

Answer:

priyanshu kumar

 Now, if we immerse an object into this bucket full of water, then the object will ... a bucket of water which is not filled to the brim, then the object will displace water ...

-Answered by priyanshu kumar On 04 May 2019:08:27:13 AM


Question 125. Asked on :22 April 2019:09:51:01 AM

 What is relation between volume of an object immersed in water and volume of displaced water?

-Added by Nitish kumar Science » FORCE

Answer:

priyanshu kumar

 The amount of fluid displaced is directly related (via Archimedes' principle) to its volume. In the case of an object that sinks (is totally submerged), the volume of the object is displaced. In the case of an object that floats, the amount of fluid displaced will be equal in weight to the displacing object.

-Answered by priyanshu kumar On 06 May 2019:10:02:39 AM


Question 126. Asked on :22 April 2019:09:48:36 AM

 What is meaning of term ''displaced liquid''.

-Added by Nitish kumar Science » ORGANISATION IN THE LIVING WORLD

Answer:

priyanshu kumar

 We can then know the volume of the object: it is equal to the volume of fluid displaced.

-Answered by priyanshu kumar On 06 May 2019:10:03:51 AM


Question 127. Asked on :22 April 2019:09:46:54 AM

 What is relative density?

-Added by Nitish kumar Science » ORGANISATION IN THE LIVING WORLD

Answer:

rocki kumar

 Is the ratio of the density (mass of a unit volume) of a substance to the density of a given reference material. Specific gravity usually means relative density with respect to water. ... If the reference material is water then a substance with a relative density (or specific gravity ...

-Answered by rocki kumar On 07 May 2019:08:21:19 AM


Question 128. Asked on :22 April 2019:09:42:48 AM

 What is hypertonic solution?

-Added by Nitish kumar Science » ORGANISATION IN THE LIVING WORLD


Question 129. Asked on :22 April 2019:09:42:07 AM

 What is isotonic solution?

-Added by Nitish kumar Science » ORGANISATION IN THE LIVING WORLD

Answer:

Rohit Rajput

 An isotonic solution refers to two solutions having the same osmotic pressure across a semipermeable membrane. This state allows for the free movement of water across the membrane without changing the concentration of solutes on either side

-Answered by Rohit Rajput On 08 May 2019:08:33:35 AM


Question 130. Asked on :22 April 2019:09:40:14 AM

What is endosmosis? 

-Added by Nitish kumar Science » ORGANISATION IN THE LIVING WORLD

Answer:

Rohit Rajput

 The main difference between endosmosis and exosmosis is that endosmosis is the movement of water into the cell whereas exosmosis is the movement of water out of the cell. Endosmosis occurs when cells are placed in hypotonic solutions. ... Exosmosis occurs when cells are placed in hypertonic solutions.

-Answered by Rohit Rajput On 08 May 2019:08:34:40 AM


Question 131. Asked on :22 April 2019:09:38:05 AM

 What happens to the raisins when they are kept in warm water for few hours?

-Added by Nitish kumar Science » ORGANISATION IN THE LIVING WORLD

Answer:

rocki kumar

When raisins are kept in water for a few hours, the raisins will swell up or theywill expand in size. This happens due to osmosis, which is the movement of molecules from a region of its higher to its lower concentration through a semi or selectively permeable membrane. ... When raisins are soaked in waterthey swell. 

-Answered by rocki kumar On 08 May 2019:08:28:45 AM


Question 132. Asked on :22 April 2019:09:36:24 AM

 Do rate of endosmosis increase when kept at low temperature? why?

-Added by Nitish kumar Science » ORGANISATION IN THE LIVING WORLD


Question 133. Asked on :22 April 2019:09:33:53 AM

 What happens if a plant cell is placed in a high concentrated solution of sugar?

-Added by Nitish kumar Science » ORGANISATION IN THE LIVING WORLD


Question 134. Asked on :22 April 2019:09:32:07 AM

 Give an example of a substance where the material imbibes water?

-Added by Nitish kumar Science » ORGANISATION IN THE LIVING WORLD


Question 135. Asked on :22 April 2019:09:30:58 AM

 What is imbibition?

-Added by priyanshu kumar Science » ORGANISATION IN THE LIVING WORLD


Question 136. Asked on :22 April 2019:09:31:13 AM

 What is hypotonic solution?

-Added by Nitish kumar Science » ORGANISATION IN THE LIVING WORLD


Question 137. Asked on :22 April 2019:09:29:56 AM

What is imbibition pressure?

-Added by Nitish kumar Science » ORGANISATION IN THE LIVING WORLD


Question 138. Asked on :22 April 2019:09:27:07 AM

 Do raisins sweli up when kept in water? if yes, why?

-Added by Nitish kumar Science » ORGANISATION IN THE LIVING WORLD


Question 139. Asked on :22 April 2019:09:25:34 AM

 What are the features of striated muscle fibre? Where do we find these in our body?

-Added by Nitish kumar Science » ORGANISATION IN THE LIVING WORLD


Question 140. Asked on :22 April 2019:09:21:41 AM

Mention the function of skeletal muscles in or body.

-Added by priyanshu kumar Science » ORGANISATION IN THE LIVING WORLD


Question 141. Asked on :22 April 2019:09:23:37 AM

 You can bite fruits like guava, grapes,banana etc, but not a piece of wood. why?

-Added by Nitish kumar Science » ORGANISATION IN THE LIVING WORLD


Question 142. Asked on :22 April 2019:09:22:11 AM

 Mention the main function of sclerenchyma tissue?

-Added by Nitish kumar Science » ORGANISATION IN THE LIVING WORLD

Answer:

Himanshi Verma

 It gives strength to the plants.

-Answered by Himanshi Verma On 14 May 2019:11:20:29 AM


Question 143. Asked on :22 April 2019:09:20:18 AM

 Which tissue, when matured, has dead cells?

-Added by Nitish kumar Science » ORGANISATION IN THE LIVING WORLD


Question 144. Asked on :22 April 2019:09:13:55 AM

  In the transverse section of stem, which tissue occupies larger space-Parenchyma or Sclerenchyma?

-Added by Nitish kumar Science » ORGANISATION IN THE LIVING WORLD


Question 145. Asked on :22 April 2019:09:13:16 AM

 What are myelinated nerves?

-Added by Nitish kumar Science » ORGANISATION IN THE LIVING WORLD


Question 146. Asked on :22 April 2019:09:12:13 AM

 Which cells are found in the stiff parts of the plant?

-Added by Nitish kumar Science » ORGANISATION IN THE LIVING WORLD


Question 147. Asked on :22 April 2019:09:11:09 AM

 Which tissue helps in movement and locomotion of body?

-Added by Nitish kumar Science » ORGANISATION IN THE LIVING WORLD

Answer:

priyanshu kumar
Muscular tissue.

-Answered by priyanshu kumar On 22 April 2019:09:12:41 AM


Question 148. Asked on :22 April 2019:09:10:12 AM

 Name the membrane that covers the muscle fibre?

-Added by Nitish kumar Science » ORGANISATION IN THE LIVING WORLD

Answer:

priyanshu kumar

 Sarcoiemma

-Answered by priyanshu kumar On 22 April 2019:09:11:24 AM


Question 149. Asked on :22 April 2019:09:08:40 AM

 Which cell provides mechanical strength to the plant body?

-Added by Nitish kumar Science » ORGANISATION IN THE LIVING WORLD


Question 150. Asked on :22 April 2019:09:07:45 AM

 What is the main function of nervous tissue?

-Added by Nitish kumar Science » ORGANISATION IN THE LIVING WORLD


Question 151. Asked on :22 April 2019:09:06:29 AM

 Name a multinucleated muscle fibre.

-Added by Nitish kumar Science » ORGANISATION IN THE LIVING WORLD

Answer:

priyanshu kumar

 Striated muscle

-Answered by priyanshu kumar On 22 April 2019:09:08:39 AM


Question 152. Asked on :22 April 2019:09:05:07 AM

 Name the tissue found in brain, spinal cord and nerves?

-Added by Nitish kumar Science » ORGANISATION IN THE LIVING WORLD


Question 153. Asked on :22 April 2019:08:57:34 AM

Which chemical substance gets deposited over sclerenchymatous cells to make their cell wall thickened?

-Added by Nitish kumar Science » ORGANISATION IN THE LIVING WORLD

Answer:

priyanshu kumar

 Lignin.

-Answered by priyanshu kumar On 22 April 2019:09:07:59 AM


Question 154. Asked on :22 April 2019:08:56:03 AM

How many dendrites and axons are found in a nerve cell?

-Added by Nitish kumar Science » ORGANISATION IN THE LIVING WORLD


Question 155. Asked on :22 April 2019:08:54:05 AM

Name three major parts of a nerve cell? 

-Added by Nitish kumar Science » ORGANISATION IN THE LIVING WORLD

Answer:

priyanshu kumar

 Cell body axon and dendrite.

-Answered by priyanshu kumar On 22 April 2019:09:04:42 AM


Question 156. Asked on :22 April 2019:08:50:11 AM

 Name the plant tissue which is dead at maturity-parenchyma or Sclerenchyma?

-Added by Nitish kumar Science » ORGANISATION IN THE LIVING WORLD

Answer:

priyanshu kumar

  Sclerenchyma

-Answered by priyanshu kumar On 22 April 2019:08:54:37 AM


Question 157. Asked on :22 April 2019:08:47:16 AM

 How parenchyma cells are different from sclerenchyma cells?

-Added by Nitish kumar Science » ORGANISATION IN THE LIVING WORLD


Question 158. Asked on :22 April 2019:08:42:00 AM

what is the shape of parenchyma cells.

-Added by priyanshu kumar Science » ORGANISATION IN THE LIVING WORLD


Question 159. Asked on :22 April 2019:08:45:41 AM

 Name the longest cell present in the human body?

-Added by Nitish kumar Science » ORGANISATION IN THE LIVING WORLD

Answer:

priyanshu kumar

 Nerve cell.

-Answered by priyanshu kumar On 22 April 2019:08:53:05 AM


Question 160. Asked on :22 April 2019:08:43:47 AM

 What is a tissue?

-Added by Nitish kumar Science » ORGANISATION IN THE LIVING WORLD

Answer:

priyanshu kumar

 Tissue is a group of cells of similar structure and function.

-Answered by priyanshu kumar On 22 April 2019:08:48:56 AM


Question 161. Asked on :22 April 2019:08:40:29 AM

 What do we use glycerine for mounting?

-Added by Nitish kumar Science » ORGANISATION IN THE LIVING WORLD


Question 162. Asked on :22 April 2019:08:39:12 AM

 Name the stain used for staining onion peel cells?

-Added by Nitish kumar Science » ORGANISATION IN THE LIVING WORLD


Question 163. Asked on :22 April 2019:08:37:56 AM

 What is the shape of cheek cells?

-Added by Nitish kumar Science » ORGANISATION IN THE LIVING WORLD

Answer:

priyanshu kumar

 They are irregular in shape.

-Answered by priyanshu kumar On 22 April 2019:08:39:24 AM


Question 164. Asked on :22 April 2019:08:36:06 AM

 How dose the onion peel appear before staining?

-Added by Nitish kumar Science » ORGANISATION IN THE LIVING WORLD


Question 165. Asked on :22 April 2019:08:33:17 AM

What is the general shape of the onion cell? 

-Added by Nitish kumar Science » ORGANISATION IN THE LIVING WORLD


Question 166. Asked on :22 April 2019:08:32:36 AM

 What is the colour of Iodine?

-Added by Nitish kumar Science » FOOD


Question 167. Asked on :22 April 2019:08:26:38 AM

 Name the solution used for testing starch in food-stuff?

-Added by Nitish kumar Science » FOOD

Answer:

priyanshu kumar

 Iodine solution


-Answered by priyanshu kumar On 22 April 2019:08:29:07 AM


Question 168. Asked on :22 April 2019:08:23:06 AM

Priya used potato for testing starch. can you give reason why she choose potato for testing starch? 

-Added by Nitish kumar Science » FOOD


Question 169. Asked on :22 April 2019:08:20:36 AM

Which carbohydrate is injected in patient to give instant energy-Glucose or starch? 

-Added by Nitish kumar Science » FOOD


Question 170. Asked on :22 April 2019:08:15:16 AM

 Name two food material which contain starch in it?

-Added by Nitish kumar Science » FOOD

Answer:

priyanshu kumar

 Potato and Rice.

-Answered by priyanshu kumar On 22 April 2019:08:36:40 AM


Question 171. Asked on :21 April 2019:11:55:10 AM

 Is there any similarity between compounds LiH, MgO and K2S?

-Added by Nitish kumar Science » Types Of Chemical Reactions


Question 172. Asked on :21 April 2019:11:52:19 AM

 Why is it suggested to wear dark coloured goggles while watching the burning of magnesium ribbon in air?

-Added by Nitish kumar Science » Types Of Chemical Reactions


Question 173. Asked on :21 April 2019:11:49:19 AM

 Name gas that turns lime water milky?

-Added by Nitish kumar Science » Types Of Chemical Reactions

Answer:

Akki chauhan

 Carbon Dioxide

-Answered by Akki chauhan On 05 July 2019:09:20:09 AM


Question 174. Asked on :21 April 2019:11:42:42 AM

 Is there a possibility of a compound other than MgO formed in the reaction of magnesium and oxygen?

-Added by Nitish kumar Science » Types Of Chemical Reactions


Question 175. Asked on :21 April 2019:11:37:14 AM

 Why dose the red litmus paper turn blue when touched with aqueous solution of magnesium oxide?

-Added by Nitish kumar Science » Types Of Chemical Reactions

Answer:

ATP Admin

 Magnesium oxide is basic in nature as it is a metalic oxide and its aqueous solution gives (OH-) ions so it turns red litmus paper into blue in colour. 

-Answered by ATP Admin On 17 June 2019:01:24:07 AM


Question 176. Asked on :21 April 2019:11:31:07 AM

 Why should magnesium ribbon be cleaned before burning it in air?

-Added by Nitish kumar Science » Types Of Chemical Reactions


Question 177. Asked on :21 April 2019:11:28:49 AM

 What is the basic principal involved in this experiment ?

-Added by Nitish kumar Science » Types Of Chemical Reactions


Question 178. Asked on :21 April 2019:11:25:45 AM

 What are the industrial applications of the type of the reaction being stuided?

-Added by Nitish kumar Science » Types Of Chemical Reactions


Question 179. Asked on :21 April 2019:11:23:29 AM

 Which gas, with brown fumes, is liberated on heating lead nitrate? 

-Added by Nitish kumar Science » Types Of Chemical Reactions


Question 180. Asked on :21 April 2019:11:22:31 AM

 Which gas catches fire with pop sound?

-Added by Nitish kumar Science » Types Of Chemical Reactions

Answer:

Hitesh kumar

  Hydrogen gas.

-Answered by Hitesh kumar On 22 April 2019:08:01:26 AM


Question 181. Asked on :21 April 2019:11:21:25 AM

 Is magnesium oxide acidic or basic?

-Added by Nitish kumar Science » Types Of Chemical Reactions

Answer:

Hitesh kumar

 It is basic in nature. 

-Answered by Hitesh kumar On 22 April 2019:08:03:01 AM


Question 182. Asked on :21 April 2019:11:18:03 AM

 What is observed in the solution of copper sulphate after the chemical reaction?

-Added by Nitish kumar Science » Types Of Chemical Reactions

Answer:

Hitesh kumar

  When Iron nail (Ferrum) is dipped in Copper sulphate (CuSO4) there takesreaction between them and coppersulphate change its color from blue to light green. ... 2) colour of the solution turns from blue to light green. The formula for this reaction is: Fe + CuSO4 --> FeSO4 + Cu. Here, Fe is more reactive than Cu.

-Answered by Hitesh kumar On 22 April 2019:08:03:50 AM


Question 183. Asked on :21 April 2019:11:16:26 AM

 In which type of reaction, dose an exchange of ions take place?

-Added by Nitish kumar Science » Types Of Chemical Reactions

Answer:

Hitesh kumar

 Double Displacement reaction.

-Answered by Hitesh kumar On 22 April 2019:08:04:55 AM


Question 184. Asked on :21 April 2019:11:13:34 AM

 In which type of reaction when aqueous solution of sodium hydroxide is treated with sulphuric acid?

-Added by Nitish kumar Science » Types Of Chemical Reactions

Answer:

Hitesh kumar

 In Decomposition reaction a compound breaks down to give two or more simpler substances. In this reaction there is only one reactant. Decomposition reaction is the opposite of a combination reaction. E.g : 1.Mercury (II) oxide on heating decomposes to give Mercury and oxygen.

-Answered by Hitesh kumar On 22 April 2019:08:08:05 AM


Question 185. Asked on :21 April 2019:11:11:45 AM

 What is the type of reaction in which the reactants give similar products?

-Added by Nitish kumar Science » Types Of Chemical Reactions


Question 186. Asked on :21 April 2019:11:08:40 AM

 What will be change in colour of CuSO4,if a Zn rod, cipped in it for two days? 

-Added by Nitish kumar Science » Types Of Chemical Reactions

Answer:

Himanshi Verma

 it get colourless.

-Answered by Himanshi Verma On 21 April 2019:11:20:48 AM


Question 187. Asked on :21 April 2019:11:07:47 AM

 what is displacement reaction?

-Added by Nitish kumar Science » Types Of Chemical Reactions

Answer:

Himanshi Verma

 The reaction in which the highly reactive element displace the less reactive element is called displacement reaction.

-Answered by Himanshi Verma On 21 April 2019:11:22:06 AM


Question 188. Asked on :21 April 2019:11:06:11 AM

What are combination reaction? 

-Added by Nitish kumar Science » Types Of Chemical Reactions

Answer:

Himanshi Verma

 A reaction in which a single product is formed from two or more rectant is known as combination reaction.

-Answered by Himanshi Verma On 21 April 2019:11:07:53 AM


Question 189. Asked on :21 April 2019:11:04:25 AM

 what is decomposition reaction?

-Added by Nitish kumar Science » Types Of Chemical Reactions

Answer:

Himanshi Verma

 The reactant in which a single reactant breaks down into two or more than two simpler products is called decomposition reaction.

-Answered by Himanshi Verma On 21 April 2019:11:09:12 AM


Question 190. Asked on :21 April 2019:11:01:15 AM

 Can copper displace iron from FeSO4 solution?Why?

-Added by Nitish kumar Science » Types Of Chemical Reactions

Answer:

Himanshi Verma

 Copper displace iron from ferrous sulphate because copper is highly rective metal.

-Answered by Himanshi Verma On 21 April 2019:11:10:50 AM


Question 191. Asked on :21 April 2019:10:54:23 AM

 What is reactivity series of metals?

-Added by Nitish kumar Science » Types Of Chemical Reactions

Answer:

Himanshi Verma

Arrangement of metals in a vertical column in decreasing order of their reactivity mis called reactivity series.

-Answered by Himanshi Verma On 21 April 2019:10:56:48 AM


Question 192. Asked on :21 April 2019:10:50:16 AM

 What happens when hydrogen burns with airs?

-Added by Nitish kumar Science » Types Of Chemical Reactions

Answer:

Himanshi Verma

 In a flame of pure hydrogen gas, burning in air, the hydrogen (H2) reacts with oxygen (O2) to form water (H2O) and releases heat. If carried out in atmospheric airinstead of pure oxygen (as is usually the case), hydrogen combustion may yield small amounts of nitrogen oxides, along with the water vapor.

-Answered by Himanshi Verma On 21 April 2019:11:00:47 AM


Question 193. Asked on :21 April 2019:10:49:17 AM

 What is sublimation?

-Added by Nitish kumar Science » Types Of Chemical Reactions

Answer:

Himanshi Verma

 Sublimation is the process in which solid is directly converted into gas and gas change into solid.

-Answered by Himanshi Verma On 21 April 2019:11:01:13 AM


Question 194. Asked on :21 April 2019:10:48:12 AM

 What is reduction?

-Added by Nitish kumar Science » Types Of Chemical Reactions

Answer:

Himanshi Verma

 The reaction in which addition of hydrogen or removal of Oxygen is called ruduction.

-Answered by Himanshi Verma On 21 April 2019:11:02:20 AM


Question 195. Asked on :21 April 2019:10:44:07 AM

 What are the type of chemical reaction ?

-Added by Nitish kumar Science » Types Of Chemical Reactions

Answer:

Himanshi Verma

 Chemical reaction are five types:

1) Combination reaction

2) Decomposition reaction

3) Displacement reaction

4) Double Displacement reaction

5) Oxidation and reduction.

-Answered by Himanshi Verma On 21 April 2019:11:04:01 AM


Question 196. Asked on :21 April 2019:10:41:17 AM

 Is a chemical change also called chemical reaction ?

-Added by Nitish kumar Science » Types Of Chemical Reactions

Answer:

Himanshi Verma

 Yes, chemical change also called chemical reaction.

-Answered by Himanshi Verma On 21 April 2019:11:05:42 AM


Question 197. Asked on :21 April 2019:10:38:50 AM

 Balance a reaction between Al and aq dil. HCI.

-Added by Nitish kumar Science » Types Of Chemical Reactions


Question 198. Asked on :21 April 2019:10:35:21 AM

 What is chemical equation?

-Added by Nitish kumar Science » Types Of Chemical Reactions

Answer:

Himanshi Verma

  A written representation of a chemical reaction, in which the symbols and amounts of the reactants are separated from those of the products by an equal sign, arrow, or a set of opposing arrows. For example, Ca(OH) 2 + H2SO4 = CaSO 4 + 2H2O, is an equation.

-Answered by Himanshi Verma On 21 April 2019:11:06:57 AM


Question 199. Asked on :21 April 2019:09:47:49 AM

What are colloids ?

-Added by Nitish kumar Science » Nature Of Matter

Answer:

Himanshi Verma

  In certain mixtures the relatively large particles called the dispersed phase are distribution throughout a solvent like medium called dispersing medium. So one particle is an aggregation of several atoms or molecules or ions. These particles and mixture is called a colloids. 

-Answered by Himanshi Verma On 21 April 2019:11:07:35 AM


Question 200. Asked on :21 April 2019:09:45:40 AM

 Can you see the colloidal particle by naked eye ?

-Added by Nitish kumar Science » Nature Of Matter

Answer:

Himanshi Verma

 No size of colloidal particles are to small to be individually seen by naked eyes.

-Answered by Himanshi Verma On 21 April 2019:10:56:14 AM


Question 201. Asked on :21 April 2019:09:44:06 AM

 Give one example of colloid of a gas in liquid ?

-Added by Nitish kumar Science » Nature Of Matter

Answer:

Himanshi Verma

 Foam, shaving cream. 

-Answered by Himanshi Verma On 21 April 2019:10:56:25 AM


Question 202. Asked on :21 April 2019:09:41:10 AM

 Give one example of solution of a gas in liquid ?

-Added by Nitish kumar Science » Nature Of Matter

Answer:

Himanshi Verma

  Oxygen in water.

-Answered by Himanshi Verma On 21 April 2019:10:56:36 AM


Question 203. Asked on :21 April 2019:09:39:16 AM

 Why are the particles of a true solution not visible to naked eye ?

-Added by Nitish kumar Science » Nature Of Matter

Answer:

Himanshi Verma

 Particles of true solutions are too small to be visible.

-Answered by Himanshi Verma On 21 April 2019:11:12:03 AM


Question 204. Asked on :21 April 2019:09:36:43 AM

 Do a particle of suspension scatter a beam of light?

-Added by Nitish kumar Science » Nature Of Matter

Answer:

Himanshi Verma

  Yes ,it makes its path visible. 

-Answered by Himanshi Verma On 21 April 2019:11:12:15 AM


Question 205. Asked on :21 April 2019:09:34:32 AM

 Which sol is a colloid of solid in solid ?

-Added by Nitish kumar Science » Nature Of Matter

Answer:

Himanshi Verma

 Coloured gemstone and milky glass are such sols.

-Answered by Himanshi Verma On 21 April 2019:11:12:26 AM


Question 206. Asked on :21 April 2019:09:33:49 AM

 What is emulsion .

-Added by Nitish kumar Science » Nature Of Matter

Answer:

Himanshi Verma

  It is a colloid of liquid in liquid,i.e.,milk, face cream.

-Answered by Himanshi Verma On 21 April 2019:11:12:37 AM


Question 207. Asked on :21 April 2019:09:33:02 AM

 what is gel.

-Added by Nitish kumar Science » Nature Of Matter

Answer:

Himanshi Verma

  A colloidal of liquid in solid is called gel. i.e., jelly, cheese,butter.

-Answered by Himanshi Verma On 21 April 2019:11:12:50 AM


Question 208. Asked on :21 April 2019:09:11:44 AM

 What is solution?

-Added by Prince Rawat Science » Nature Of Matter

Answer:

Himanshi Verma

 Any homogeneous mixture of two or more substances (solid, liquid or gases) is called solution .In solutions there is a homogeneity at micro level.

-Answered by Himanshi Verma On 21 April 2019:11:13:03 AM


Question 209. Asked on :21 April 2019:09:11:05 AM

 What is suspension .

-Added by Nitish kumar Science » Nature Of Matter

Answer:

Himanshi Verma

 Materials of smaller particle size, insoluble in a solvent but visible to naked eye, give suspension.

-Answered by Himanshi Verma On 21 April 2019:11:13:20 AM


Question 210. Asked on :21 April 2019:09:09:46 AM

 Do suspension shows Tyndall effect? 

-Added by Prince Rawat Science » Nature Of Matter

Answer:

Himanshi Verma

 They may or may not show Tyndall effect.

-Answered by Himanshi Verma On 21 April 2019:11:13:50 AM


Question 211. Asked on :21 April 2019:09:09:10 AM

 What is physical nature of matter .

-Added by Nitish kumar Science » Nature Of Matter

Answer:

Himanshi Verma

  Matter is made up of small particles if a spoonfull of  salt is dissolved in a glass of water, the level of water does not change. 

-Answered by Himanshi Verma On 21 April 2019:11:13:34 AM


Question 212. Asked on :21 April 2019:09:07:25 AM

 Give to examples of colloidal solution. 

-Added by Prince Rawat Science » Nature Of Matter

Answer:

Himanshi Verma

  Blood, milk and gum. etc.

-Answered by Himanshi Verma On 21 April 2019:11:14:03 AM


Question 213. Asked on :19 April 2019:03:56:08 PM

 what do you mean by tilling 


-Added by Sohail alam Science » Science

Answer:

Himanshi Verma

 Tillage is the agricultural preparation of soil by mechanical agitation of various types, such as digging, stirring, and overturning. Examples of human-powered tilling methods using hand tools include shovelling, picking, mattock work, hoeing, and raking. ... "Tillagecan also mean the land that istilled.

-Answered by Himanshi Verma On 21 April 2019:11:14:18 AM


Question 214. Asked on :19 April 2019:02:51:12 PM

 

-Added by Sohail alam Science » Science H


Question 215. Asked on :19 April 2019:08:31:06 AM

 कॉमबाइन मशीन किसे कहते है?

-Added by priyanshu kumar Science » फसल उत्पादन एवं प्रबंध

Answer:

Sohail alam

 machine that simultaneously cutsthreshes, and cleans a standing crop of grain

-Answered by Sohail alam On 19 April 2019:02:49:21 PM


Question 216. Asked on :19 April 2019:08:29:31 AM

 What is chemical reaction.

-Added by Prince Rawat Science » Chemical Reaction And Equation

Answer:

Sohail alam

 Chemical reaction, a process in which one or more substances, the reactants, are converted to one or more different substances, the products. Substances are either chemical elements or compounds. A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products.

-Answered by Sohail alam On 19 April 2019:03:03:21 PM


Question 217. Asked on :18 April 2019:08:15:05 AM

 What do you mean by agriculture implements


-Added by Sohail alam Science » Science Mindly Questions

Answer:

Himanshi Verma

 The agricultural implements cover ploughs, threshers, axes, powrahs, chaffcutter machine, cultivators, seed drills, etc. These implements are used for agriculture work to improve the efficiency and reduce the labour. A large variety of agricultural implements are also used as attachments to tractors.

-Answered by Himanshi Verma On 21 April 2019:10:38:14 AM


Question 218. Asked on :17 April 2019:10:51:40 AM

 Where do the households or offices in cities get their drinking water from? 

-Added by Rohit Rajput Science » Pollution Of Air And Water Where


Question 219. Asked on :17 April 2019:10:46:16 AM

 What is potable water?

-Added by Rohit Rajput Science » Pollution Of Air And Water

Answer:

Hitesh kumar

 Potable water” simply means water that is safe to drink, and it is becoming scarcer in the world Increasing use is stressing freshwater resources worldwide, and a seemingly endless list of contaminants can turn once potable water into a health hazard or simply make it unacceptable aesthetically.


-Answered by Hitesh kumar On 20 April 2019:08:04:54 AM


Question 220. Asked on :17 April 2019:10:41:54 AM

 Which gas is most responsible for global warming?  

-Added by Rohit Rajput Science » Pollution Of Air And Water

Answer:

Himanshi Verma

 Co2 gas is most responsible for Global Warming. 

-Answered by Himanshi Verma On 21 April 2019:10:39:02 AM


Question 221. Asked on :17 April 2019:10:39:40 AM

What are the reasons of water scarcity? 

-Added by Rohit Rajput Science » Pollution Of Air And Water

Answer:

Himanshi Verma

 Economic water scarcity is caused by a lack of investment in infrastructure or technology to draw water from rivers, aquifers or other water sources, or insufficient human capacity to satisfy the demand for water. One quarter of the world's population is affected by economic water scarcity.

-Answered by Himanshi Verma On 21 April 2019:10:39:14 AM


Question 222. Asked on :17 April 2019:10:38:38 AM

 What is meant by air pollution? 

-Added by Rohit Rajput Science » Pollution Of Air And Water

Answer:

Himanshi Verma

 Air pollution is defined as the introduction of pollutants, organic molecules, or other unsafe materials into Earth’s atmosphere. This can be in the form of excessive gases like carbon dioxide and other vapours that cannot be effectively removed through natural cycles, such as the carbon cycle or the nitrogen cycle.

-Answered by Himanshi Verma On 21 April 2019:10:39:27 AM


Question 223. Asked on :17 April 2019:10:36:43 AM

 How is water getting polluted?

-Added by Rohit Rajput Science » Pollution Of Air And Water

Answer:

Himanshi Verma

 Chemical waste from factories is sometimes dumped into rivers and lakes, or directly into the ground. Pesticides (chemicals that kill insects) applied to farmland enter surface water and groundwater, often in large quantities. Once a pollutant enters a water supply, it is difficult to get rid of it.

-Answered by Himanshi Verma On 21 April 2019:10:39:38 AM


Question 224. Asked on :17 April 2019:10:34:47 AM

 Name the greenhouse gases.

-Added by Rohit Rajput Science » Pollution Of Air And Water

Answer:

Hitesh kumar

 Carbon dioxide (CO. ...

Methane (CH. ...

  • Nitrous oxide (N. 2O)
  • Ozone (O. ...
  • Chlorofluorocarbons (CFCs)
  • Hydrofluorocarbons (incl. HCFCs and HFCs)

-Answered by Hitesh kumar On 20 April 2019:10:00:10 AM


Question 225. Asked on :17 April 2019:10:32:33 AM

 what is greenhouse gases?

-Added by Rohit Rajput Science » Pollution Of Air And Water

Answer:

Himanshi Verma

  Greenhouse gas, any gas that has the property of absorbing  emitted from Earth’s surface and reradiating it back to Earth’s surface, thus contributing to the green house effect. carbon dioxide and methane and water vapour are the most important greenhouse gases. (To a lesser extent, surface-level  fluorinated gases also trap infrared radiation.) Greenhouse gases have a profound effect on the energy. budget of the Earth system despite making up only a fraction of all atmospheric gases. Concentrations of greenhouse gases have varied substantially during Earth’s history, and these variations have driven substantial climate changes. at a wide range of timescales. In general, greenhouse gas concentrations have been particularly high during warm periods and low during cold periods.

-Answered by Himanshi Verma On 21 April 2019:10:39:54 AM


Question 226. Asked on :17 April 2019:10:31:20 AM

 What sources in the home may lead to noise ? 

-Added by Rohit Rajput Science » Sound

Answer:

Himanshi Verma

  Household sources: Gadgets like food mixer, grinder, vacuum cleaner, washing machine and dryer, cooler, air conditioners, can be very noisy and injurious to health. Others include loud speakers of sound systems and TVs, ipods and ear phones.

-Answered by Himanshi Verma On 21 April 2019:10:40:16 AM


Question 227. Asked on :17 April 2019:10:27:51 AM

 Can you list some sources of noise pollution?

-Added by Rohit Rajput Science » Sound

Answer:

Himanshi Verma

  What are the sources of noise pollutionNoise can come from many places. ... Gadgets like food mixer, grinder, vacuum cleaner, washing machine and dryer, cooler, air conditioners, can be very noisy and injurious to health. Others include loud speakers of sound systems and TVs, ipods and ear phones.

-Answered by Himanshi Verma On 21 April 2019:10:40:28 AM


Question 228. Asked on :17 April 2019:10:25:16 AM

 Play this instrument and identify its vibrating part.

-Added by Rohit Rajput Science » Sound

Answer:

Himanshi Verma

  The vibrating part of the- flute is the air column which is vibrating and comes from within the instrument. veena is usually the strings, but they do it by means of the saddle and the bridge. tabla is the membranes which vibrate upon beating it.

-Answered by Himanshi Verma On 21 April 2019:10:40:44 AM


Question 229. Asked on :17 April 2019:10:24:03 AM

 Touch the school bell when not in use. what do you feel?

-Added by Rohit Rajput Science » Sound

Answer:

Himanshi Verma

 It feels like vibirating because all the things that produce sound vibrates

-Answered by Himanshi Verma On 21 April 2019:10:41:32 AM


Question 230. Asked on :17 April 2019:10:23:03 AM

 Make a list of sound you hear in your surroundings.

-Added by Rohit Rajput Science » Sound

Answer:

Himanshi Verma

 (1) horn of Vehicles

(2) Unpleasant sound of clubs, D.J

(3) Sound of Phone

-Answered by Himanshi Verma On 21 April 2019:10:42:18 AM


Question 231. Asked on :17 April 2019:10:20:09 AM

How do you come to know that a 'period' is over in your school?

-Added by Rohit Rajput Science » Sound

Answer:

Himanshi Verma

 When bell is rang by the poen we hear the sound bell and we know that t6he period is over in school.

-Answered by Himanshi Verma On 21 April 2019:10:44:41 AM


Question 232. Asked on :17 April 2019:10:16:39 AM

 WHY do kabaddi players rub their hands with the soil?

-Added by Rohit Rajput Science » Friction

Answer:

Himanshi Verma

 The kabaddi players rub their hands with the soil before the game start, because the soil increases the rough ness and hence the friction while catching the playerfirmly such that not to slip.

-Answered by Himanshi Verma On 21 April 2019:10:45:42 AM


Question 233. Asked on :17 April 2019:08:59:58 AM

 Define vibration. what is its other name?

-Added by Rohit Rajput Science » Sound

Answer:

Himanshi Verma

 A periodic motion of the particles of an elastic body or medium in alternately opposite directions from the position of equilibrium when that equilibrium has been disturbed (as when a stretched cord produces musical tones or molecules in the air transmit sounds to the ear)

-Answered by Himanshi Verma On 21 April 2019:10:50:16 AM


Question 234. Asked on :17 April 2019:08:58:35 AM

 Define plane.

-Added by Rohit Rajput Science » Light

Answer:

Himanshi Verma

 A flat surface on which a straight line joining any two points on it would wholly lie.

-Answered by Himanshi Verma On 21 April 2019:10:50:28 AM


Question 235. Asked on :17 April 2019:08:57:12 AM

 How many image, does one mirror from?

-Added by Rohit Rajput Science » Light

Answer:

Himanshi Verma

 Infinite images are formed by two parallel mirrors. But not many are seen as the light gets a little absorbed every time it reached and strikes the mirror.

-Answered by Himanshi Verma On 21 April 2019:10:51:18 AM


Question 236. Asked on :17 April 2019:08:55:55 AM

 What is virtual image?

-Added by Rohit Rajput Science » Light

Answer:

Himanshi Verma

 An optical image formed from the apparent divergence of light rays from a point, as opposed to an image formed from their actual divergence.

-Answered by Himanshi Verma On 21 April 2019:10:52:13 AM


Question 237. Asked on :17 April 2019:08:53:00 AM

 Define incident ray.


-Added by Rohit Rajput Science » Light

Answer:

Himanshi Verma
An incident ray is a ray of light that strikes a surface. The angle between this ray and the perpendicular or normal to the surface is the angle ofincidence.

-Answered by Himanshi Verma On 21 April 2019:10:53:01 AM


Question 238. Asked on :15 April 2019:02:28:01 PM

Name the unit in which calorific  value of a fuel is expressed 

-Added by Sohail alam Science » Science

Answer:

priyanshu kumar

  The calorific value of fuel is the amount of heat produced by the complete combustion of 1 kg of fuel. Hence, the calorific value of the fuel is 40,000 kJ/kg.

-Answered by priyanshu kumar On 17 April 2019:08:56:27 AM


Question 239. Asked on :13 April 2019:03:39:27 PM

what do you mean by Virus

 

-Added by Sohail alam Science » Science

Answer:

Nitish kumar

 A computer virus is a malicious software program loaded onto a user's computer without the user's knowledge and performs malicious actions. ... It can self-replicate, inserting itself onto other programs or files, infecting them in the process. Not all computer viruses are destructive though

-Answered by Nitish kumar On 16 April 2019:08:27:07 AM


Question 240. Asked on :13 April 2019:03:32:32 PM

what is microorganism


 

-Added by Sohail alam Science » Science Questions

Answer:

priyanshu kumar

 A microscopic organism, especially a bacterium, virus, or fungus.

-Answered by priyanshu kumar On 17 April 2019:08:59:14 AM


Question 241. Asked on :09 April 2019:09:52:03 AM

 What are two modes by which animals reproduce?


-Added by Himanshi Verma Science » Reproduction In Animals

Answer:

Nitish kumar

  The different modes of asexual reproduction in animals include gemmules (sponges), fragmentation (planarians), regeneration (echinoderms) and parthenogenesis (ants, wasps).

-Answered by Nitish kumar On 15 April 2019:10:15:30 AM


Question 242. Asked on :09 April 2019:09:50:06 AM

 Does charcoal produce a flame on burning?

-Added by Himanshi Verma Science » Combustion And Flame `

Answer:

priyanshu kumar

  As David Curran correctly stated in his answer, charcoal can produce a flamewhen burning. However, charcoal frequently exhibits a non-flaming type ofcombustion. This is because flames only occur when combustion is occurring in the gas phase, (or if the combustion reaction is producing gas.)

-Answered by priyanshu kumar On 17 April 2019:09:01:29 AM


Question 243. Asked on :09 April 2019:09:48:11 AM

 Name a substance which burs itself in air.

-Added by Himanshi Verma Science » Combustion And Flame `

Answer:

priyanshu kumar

  CNG is a cleaner fuel. The substances which burn in air are called combustible. During the process of combustion, heat and light are given out.

-Answered by priyanshu kumar On 17 April 2019:09:03:22 AM


Question 244. Asked on :09 April 2019:09:46:19 AM

 

-Added by Prince Rawat Science » Crop Production And Maagement


Question 245. Asked on :09 April 2019:09:43:42 AM

 Name the bacterium present in the nodules of the roots pf leguminous plants which fixes atmosphere nitrogen.


-Added by Prince Rawat Science » Science

Answer:

Hitesh kumar

  Root nodules are found on the roots of plants, primarily legumes, that form a symbiosis with nitrogen-fixing bacteria. Under nitrogen-limiting conditions, capable plants form a symbiotic relationship with a host-specific strain of bacteria known as rhizobia.

-Answered by Hitesh kumar On 20 April 2019:10:03:03 AM


Question 246. Asked on :09 April 2019:09:40:14 AM

 Name the chemical substances which are rich in a particular nutrient ? 

-Added by Prince Rawat Science » Crop Production And Management

Answer:

Himanshi Verma

 Carbon hydrogen oxygen potassium sulphur etc.

-Answered by Himanshi Verma On 15 April 2019:04:32:55 PM


Question 247. Asked on :29 March 2019:07:46:02 AM

 Q. what is irrigation ? Describe two methods of irrigation which conserve water :-


-Added by Krishna Verma Science » Crop Production And Management

Answer:

Himanshi Verma

 The process of watering the crops is called irrigationTwo methods of irrigationare: (i) Sprinkler system : This system is used on the uneven land where less wateris available. ... (ii) Drip irrigation: This system is used to save water as it allows the water to flow drop by drop at the roots of the plants.

-Answered by Himanshi Verma On 06 April 2019:06:42:21 PM


Question 248. Asked on :28 March 2019:05:13:59 PM

Why is sodium carbonate a main component of antacid?

-Added by Himanshi Verma Science » Acid Bases And Salts

Answer:

Nitish kumar

  Sodium Hydrogen carbonate is a main component of antacid because it is a basic substance which reacts with stomach’s acid HCl and neutralizes it.  

-Answered by Nitish kumar On 09 April 2019:09:29:13 AM


Question 249. Asked on :28 March 2019:05:10:49 PM

Why is respiration considered an exothermic reaction? Explain.

-Added by Rohit rajput Science » रासयिनिक अभिक्रियाए और समीकरण

Answer:

Himanshi Verma

 Respiration takes place in our body cells regularly. This is an exothermic reaction. After breaking down of obtained carbohydrate from food converts into glucose, which provides energy to our body combine with oxygen. Hence the exothermic reaction gives energy in very large quantity so the respiration is also called an exothermic reaction.

-Answered by Himanshi Verma On 28 March 2019:05:12:33 PM


Question 250. Asked on :28 March 2019:05:05:08 PM

 संतुलित रसायनिक समीकरण क्या है ? रसायनिक समीकरण को संतुलित करना क्यों आवश्यक है ?

-Added by Rohit rajput Science » रासयिनिक अभिक्रियाए और समीकरण

Answer:

Himanshi Verma

 जब अभिकारक और उत्पाद दोनों तरफ के प्रत्येक तत्व के परमाणुओं की संख्या समान हो तो ऐसे समीकरण को संतुलित रासायनिक समीकरण कहते है | द्रव्यमान संरक्षण के नियम को संतुष्ट करने के लिए रासायनिक समीकरण को संतुलित किया जाता है |

-Answered by Himanshi Verma On 28 March 2019:05:05:54 PM


Question 251. Asked on :28 March 2019:05:03:45 PM

 वायु में जलाने से पहले मैग्नीशियम रिबन को साफ क्यों किया जाता है ?

-Added by Rohit rajput Science » रासयिनिक अभिक्रियाए और समीकरण

Answer:

Himanshi Verma

वायु में जलाने से पहले मैग्नीशियम रिबन को साफ किया जाता है ताकि वह जलते समय पूरी तरह वायु के संपर्क में रहे | 


-Answered by Himanshi Verma On 28 March 2019:05:06:59 PM


Question 252. Asked on :28 March 2019:04:29:59 PM

 What is Newland's Law of Octaves and what is its limitation?

-Added by Himanshi Verma Science » Periodic Classification Of Elements

Answer:

Manisha kumari

 Every eighth element had properties similar to that of that first this law is known as Newland's Law of Octaves.                                                      Limitations of law of octavesThe law of octaveshas the following limitations ; (A) The law of octaves was found to be applicable only upto calcium. (B)It was not applicable to elements of higher atomic masses. (C) Newlands placed two elements in the same slot to fit elements in the table.

-Answered by Manisha kumari On 05 April 2019:04:47:09 PM


Question 253. Asked on :25 March 2019:03:59:09 PM

Q.what are microoorganism ?

-Added by Nishant verma Science » Science

Answer:

priyanshu kumar

 A microorganism is any living organism like bacteria, protozoa, or even fungi that cannot be seen with the naked eye. Microorganisms can only be viewed through a microscope and are extremely important to plant life, plant health, and soil composition.

-Answered by priyanshu kumar On 17 April 2019:08:55:24 AM


Question 254. Asked on :23 March 2019:04:35:20 PM

 Q. State difference between manure and fertilizer?

-Added by Shruti Srivastva Science » Science

Answer:

Himanshi Verma

 Fertiliser : 

1.) A fertiliser is an inorganic salt. 

2.) A fertiliser is prepared in factories. 

3.) A fertiliser does not provide any humus to the soil. 

4.) Fertilisers are very rich in plant nutrients like nitrogen, phosphorus and potassium. 


Manure : 

1.) Manure is a natural substance obtained by the decomposition of cattle dung, human waste and plant residues. 

2.) Manure can be prepared in the fields. 

3.) Mqnure provides a lot of humus to the soil. 

4.) Manure is relatively less rich in plant nutrients. 

-Answered by Himanshi Verma On 25 March 2019:04:28:56 PM


Question 255. Asked on :23 March 2019:04:30:53 PM

 Q. 

-Added by Shruti Srivastva Science » Science


Question 256. Asked on :22 March 2019:04:56:00 PM

 What is Electromagnetic waves?

-Added by Rohit rajput Science » Physics

Answer:

Himanshi Verma

 The waves which do not require medium for their propagation i.e., which can propagate even through the vaccum are called electromagnetic waves.

Light radio waves, X- rays, etc are the examples of electromagnetic waves. These wave propagate with the velocity of light in vaccum.  

-Answered by Himanshi Verma On 23 March 2019:05:49:30 PM


Question 257. Asked on :22 March 2019:04:49:43 PM

 Who discovered Cathode Rays?

-Added by Himanshi Verma Science » Atomic

Answer:

Himanshi Verma

  Cathode ray was  discovered by sir William Crooke.

-Answered by Himanshi Verma On 23 March 2019:05:49:49 PM


Question 258. Asked on :22 March 2019:04:32:24 PM

 Why it is dangerous to sleep in an unventilated room with fair burning

-Added by Gunnaj sheikh Science » Chemistry

Answer:

Himanshi Verma

 It is dangerous to sleep in an inventilated room with fire burning inside because the fire produce carbon monoxide and carbon dioxide gases which are very harmful for us.

-Answered by Himanshi Verma On 22 March 2019:04:37:33 PM