Asked/Added Questions From NCERT: Science

Question 1. Asked on :22 March 2020:08:15:31 PM

Which is the more reactive metal?

-Added by Aman Senapati Science » Metal And Non Metals

Answer:

Master Mind

Potassium (K) is the most reactive metal.

-Answered by Master Mind On 22 March 2020:08:55:15 PM

Question 2. Asked on :18 February 2020:11:28:40 AM

What is meant by chloroplast?

-Added by Sohail alam Science » Our Earth

Answer:

Master Mind

Chloroplast is a green pigment present in leaves of plants. Which give green colour to leaves.

-Answered by Master Mind On 18 February 2020:06:19:12 PM

Question 3. Asked on :07 February 2020:03:28:01 PM

Define stamen?

-Added by Suman Kumari Science » Science

Answer:

priyanshu kumar

Stamen is a reproductive part of plant.

-Answered by priyanshu kumar On 17 February 2020:02:49:27 PM

Question 4. Asked on :07 February 2020:03:27:17 PM

Define pistil?

-Added by Suman Kumari Science » Science

Answer:

priyanshu kumar

Pistil is a reproductive part of plant.

-Answered by priyanshu kumar On 17 February 2020:02:49:40 PM

Question 5. Asked on :07 February 2020:03:25:22 PM

Name the reproductive part o a plant?

-Added by Suman Kumari Science » Science

Answer:

priyanshu kumar

Stamen and pistil.

-Answered by priyanshu kumar On 17 February 2020:02:49:57 PM

Question 6. Asked on :07 February 2020:09:44:31 AM

What is Electric Current?

-Added by Akki chauhan Science » Electricity

Answer:

priyanshu kumar
The rate of flow of charge of electron is called Electric current

-Answered by priyanshu kumar On 17 February 2020:02:50:22 PM

Question 7. Asked on :07 February 2020:09:40:02 AM

What is full form ADP?

-Added by Akki chauhan Science » Life Process.

Answer:

priyanshu kumar
Adenosine Dri Phosphate.

-Answered by priyanshu kumar On 17 February 2020:02:50:33 PM

Question 8. Asked on :07 February 2020:09:39:20 AM

What is full form o ATP?

-Added by Akki chauhan Science » Life Process

Answer:

Akki chauhan
Adenosine Tri phosphate.

-Answered by Akki chauhan On 07 February 2020:09:42:12 AM

Question 9. Asked on :07 February 2020:09:36:26 AM

What is full form of DNA?

-Added by Akki chauhan Science » Life Process

Answer:

priyanshu kumar
Deoxyribo Nucleic Acid.

-Answered by priyanshu kumar On 17 February 2020:02:51:05 PM

Question 10. Asked on :03 February 2020:06:43:20 PM

Why respiration considered as Exothermic reaction?

-Added by Akki chauhan Science » Chemistry

Question 11. Asked on :03 February 2020:06:42:38 PM

Why we store silver chloride in dark bottles?

-Added by Akki chauhan Science » Chemistry

Answer:

priyanshu kumar
Silver chloride is stored in dark coloured bottles because it reacts with sunlight and decomposes to form silver and chlorine gas. So to prevent this it is stored in dark coloured bottles. the type of reaction is photolytic decomposition reaction.

-Answered by priyanshu kumar On 17 February 2020:02:51:34 PM

Question 12. Asked on :03 February 2020:06:41:54 PM

Write chemical equation of decomposition reaction?

-Added by Akki chauhan Science » Chemistry

Answer:

priyanshu kumar
A decomposition reaction occurs when one reactant breaks down into two or more products. This can be represented by the general equation: AB → A + B. Examples of decomposition reactions include the breakdown of hydrogen peroxide to water and oxygen, and the breakdown of water to hydrogen and oxygen

-Answered by priyanshu kumar On 17 February 2020:02:51:43 PM

Question 13. Asked on :03 February 2020:06:41:04 PM

What happens when quick lime is added to water?

-Added by Akki chauhan Science » Chemistry

Answer:

priyanshu kumar
When Calcium oxide i.e. quick lime is added to water filled in a bucket, it reacts vigorously with water to produce slaked lime (calcium hydroxide) releasing a large amount of he

-Answered by priyanshu kumar On 17 February 2020:02:51:53 PM

Question 14. Asked on :03 February 2020:06:19:10 PM

Explain the fleming's left hand rule.

-Added by Khushi Chauhan Science » Magnetic Effects Of Electricity

Answer:

priyanshu kumar
Stretch the thumb, Fore inger and middle inger of your left hand such that they are perpendicular to each other. If fore finger indicates the magnetic field and middle inger indiactes the direction of current and thumb indicates direction of force or motion.

-Answered by priyanshu kumar On 17 February 2020:02:52:41 PM

Question 15. Asked on :31 January 2020:07:14:21 PM

Name excretory organ in amoeba and earthworm?

-Added by Himanshi Verma Science » Life Processes

Answer:

priyanshu kumar

Amoeba- cell memebrane

Earthworm- outer covering (skin

-Answered by priyanshu kumar On 17 February 2020:02:53:17 PM

Question 16. Asked on :31 January 2020:07:13:07 PM

Woody plants carry gaseous exchange through?

-Added by Himanshi Verma Science » Life Processes

Answer:

priyanshu kumar

Lenticles.

-Answered by priyanshu kumar On 17 February 2020:02:53:29 PM

Question 17. Asked on :31 January 2020:07:10:26 PM

What is dialysis?

-Added by Himanshi Verma Science » Life Processes

Answer:

priyanshu kumar

The process by which blood is cleared of metabolic wastes in case o kidney failure is called dialysis.

-Answered by priyanshu kumar On 17 February 2020:02:53:38 PM

Question 18. Asked on :31 January 2020:07:09:17 PM

What is refractive Index?

-Added by Himanshi Verma Science » Light

Answer:

priyanshu kumar
The ratio of the velocity of light in a vaccum to its velocity in a specified medium. This is called Refractive Index.

-Answered by priyanshu kumar On 17 February 2020:02:53:48 PM

Question 19. Asked on :31 January 2020:06:31:45 PM

What is reflection of light?

-Added by Himanshi Verma Science » Light

Answer:

priyanshu kumar
Bouncing back of light from highly polished surface like mirror is called relection of light.

-Answered by priyanshu kumar On 17 February 2020:02:53:57 PM

Question 20. Asked on :26 January 2020:02:05:33 PM

Write the colours of sun ?

-Added by Manisha Kumari Science » Light And Reflection

Answer:

priyanshu kumar
White

-Answered by priyanshu kumar On 17 February 2020:02:55:00 PM

Question 21. Asked on :14 January 2020:09:44:29 AM

What is meant by scattering of light?

-Added by Akki chauhan Science » Human Eye

Answer:

A??k Pal
Change of direction of light on striking a scattered.

-Answered by A??k Pal On 15 January 2020:11:37:13 AM

Question 22. Asked on :14 January 2020:09:39:02 AM

What phenomenon causes twinkling of star on a clear night?

-Added by Akki chauhan Science » Human Eye

Answer:

A??k Pal
Atmospheric refraction.

-Answered by A??k Pal On 15 January 2020:11:37:21 AM

Question 23. Asked on :14 January 2020:09:38:11 AM

Which defect of vision can be rectified using a concave lens?

-Added by Akki chauhan Science » Human Eye

Answer:

A??k Pal
Myopia.

-Answered by A??k Pal On 15 January 2020:11:39:21 AM

Question 24. Asked on :14 January 2020:09:37:27 AM

State one effect produced by the scattering of light by the atmosphere?

-Added by Akki chauhan Science » Human Eye

Answer:

A??k Pal
Tyndall Effect.

-Answered by A??k Pal On 15 January 2020:11:39:30 AM

Question 25. Asked on :14 January 2020:09:36:49 AM

Which type of Image formed on the retina of the eye?

-Added by Akki chauhan Science » Human Eye

Answer:

A??k Pal
Real and Inverted.

-Answered by A??k Pal On 15 January 2020:11:39:42 AM

Question 26. Asked on :14 January 2020:09:34:30 AM

As light rays pass from into glass prism, are they reflected towards or away from the normal?

-Added by Akki chauhan Science » Human Eye

Answer:

A??k Pal
Towards the normal.

-Answered by A??k Pal On 15 January 2020:11:39:48 AM

Question 27. Asked on :14 January 2020:09:33:50 AM

Who was the first person to obtain the spectrum of sunlight?

-Added by Akki chauhan Science » Human Eye

Answer:

A??k Pal
Issac Newton.

-Answered by A??k Pal On 15 January 2020:11:39:58 AM

Question 28. Asked on :14 January 2020:09:32:46 AM

Which color has largest Wavelength?

-Added by Akki chauhan Science » Human Eye

Answer:

A??k Pal
Red

-Answered by A??k Pal On 15 January 2020:11:40:09 AM

Question 29. Asked on :14 January 2020:09:31:46 AM

The defect of myopia can be corrected by using

-Added by Akki chauhan Science » Human Eye

Answer:

A??k Pal
Concave lens.

-Answered by A??k Pal On 15 January 2020:11:40:26 AM

Question 30. Asked on :14 January 2020:09:24:18 AM

What are Ores?

-Added by Akki chauhan Science » Metal And Non Metals

Answer:

A??k Pal
A naturally occurring solid material from which a metal or valuable mineral can be extracted profitably. this is called Ores.

-Answered by A??k Pal On 16 January 2020:11:03:07 AM

Question 31. Asked on :14 January 2020:09:23:45 AM

What are Minerals?

-Added by Akki chauhan Science » Metal And Non Metals

Answer:

A??k Pal
Minerals are the substances that are formed naturally in the earth. this is called minerals.

-Answered by A??k Pal On 16 January 2020:11:03:33 AM

Question 32. Asked on :09 January 2020:06:11:58 PM

What is the far point of the normal eye?

-Added by Himanshi Verma Science » The Human Eye And The Colourful World

Answer:

A??k Pal

Infinity.

-Answered by A??k Pal On 16 January 2020:11:03:45 AM

Question 33. Asked on :09 January 2020:06:06:21 PM

What are the different ways by which speciation takes place?

-Added by Himanshi Verma Science » Heredity And Evolution

Answer:

A??k Pal

1. Gene flow: occurs between population that are partly but not completely separated.

2. Genetic Drift: It is the random change in the frequency of allels in a population over successive generations.

3. Natural selection: The process by which nature slects and consolidate those organisms which are more suitable adapted and possess favourable variations.

4. Geographical isolation: It is caused by mountain ranges, rivers etc. geographical isolation leads to reproductive isolation due to which there is no low of genes between seprated groups of population.

-Answered by A??k Pal On 16 January 2020:11:03:56 AM

Question 34. Asked on :09 January 2020:06:04:35 PM

What is evolution?

-Added by Himanshi Verma Science » Heredity And Evolution

Answer:

A??k Pal

Evolution is the sequence of gradual changes which takes place in the primitive organisms, over million of years, in which new species are produced.

-Answered by A??k Pal On 16 January 2020:11:04:41 AM

Question 35. Asked on :09 January 2020:06:01:45 PM

Who was known as the father of genetics?

-Added by Himanshi Verma Science » Heredity And Evolution

Answer:

priyanshu kumar
Gregor Mendel, known as the "father of modern genetics," was born in Austria in 1822. A monk, Mendel discovered the basic principles of heredity through experiments in his monastery's garden.

-Answered by priyanshu kumar On 15 January 2020:11:19:57 AM

Question 36. Asked on :08 January 2020:06:03:04 PM

What is catenation?

-Added by Himanshi Verma Science » Carbon And Its Compound

Answer:

A??k Pal

Carbon can link with carbon atoms by means o covalent bonds to form long chains, branched chains and closed ring compound. Carbon atom may be linked by single, dpouble, or triple bonds.

-Answered by A??k Pal On 16 January 2020:11:05:04 AM

Question 37. Asked on :03 January 2020:07:40:00 PM

What is hydrocarbon?

-Added by Aarohi Chauhan Science » Carbon And Its Compound

Answer:

A??k Pal
The compound formed from hydrogen and carbon is said to be hydrocarbon.

-Answered by A??k Pal On 16 January 2020:11:05:14 AM

Question 38. Asked on :03 January 2020:07:38:35 PM

What is soapanification?

-Added by Aarohi Chauhan Science » Carbon And Its Compound

Answer:

priyanshu kumar

Saponification is a process by which triglycerides are reacted with sodium or potassium hydroxide (lye) to produce glycerol and a fatty acid salt, called "soap." The triglycerides are most often animal fats or vegetable oils.

-Answered by priyanshu kumar On 15 January 2020:11:20:23 AM

Question 39. Asked on :27 December 2019:07:10:10 PM

how many laws are having for reflection?

-Added by Aman Senapati Science » Light

Answer:

Rohit Rajput

There are two laws of refection:-

1st law of reflection

The angle of incidence is equal to the angle of reflection or l_i=l_r.

2nd law of reflection

The incident ray, the normal at the point of incidence and the reflected ray lie on the same plane.

-Answered by Rohit Rajput On 29 December 2019:10:16:38 AM

Question 40. Asked on :27 December 2019:07:08:02 PM

Define Anode?

-Added by Aman Senapati Science » Chemical Effect Of Electric Current

Answer:

priyanshu kumar

The electrode connected to the positive terminal of a cell or battery.

-Answered by priyanshu kumar On 15 January 2020:11:21:04 AM

Question 41. Asked on :27 December 2019:07:00:17 PM

Name the biggest plant in the world having largest bloom?

-Added by Aman Senapati Science » Plants.

Answer:

priyanshu kumar

Rafflesia Arnoldii

-Answered by priyanshu kumar On 15 January 2020:11:21:13 AM

Question 42. Asked on :27 December 2019:06:46:04 PM

Define Cathode?

-Added by Aman Senapati Science » Chemical Effect Of Electric Current

Answer:

priyanshu kumar

The electrode connected to the negative terminal of a cell or battery.

-Answered by priyanshu kumar On 15 January 2020:11:21:37 AM

Question 43. Asked on :27 December 2019:06:43:40 PM

Name two devices which can detect even a weak current?

-Added by Aman Senapati Science » Chemical Effect Of Electric Current

Answer:

priyanshu kumar

LED and Magnetic Compass.

-Answered by priyanshu kumar On 15 January 2020:11:21:46 AM

Question 44. Asked on :20 December 2019:06:50:39 PM

Excess noise around us causes which pollution?

-Added by Aman Senapati Science » Sound

Answer:

priyanshu kumar

Noise pollution.

-Answered by priyanshu kumar On 23 December 2019:09:08:56 AM

Question 45. Asked on :20 December 2019:06:47:47 PM

In a wind instrument,sound is produced by which column?

-Added by Aman Senapati Science » Sound

Answer:

priyanshu kumar

Air column.

-Answered by priyanshu kumar On 23 December 2019:09:09:08 AM

Question 46. Asked on :20 December 2019:06:45:47 PM

In which medium does sound travel fastest?

-Added by Aman Senapati Science » Sound

Answer:

priyanshu kumar

Solid medium.

-Answered by priyanshu kumar On 23 December 2019:09:09:24 AM

Question 47. Asked on :20 December 2019:06:43:02 PM

The loudness of sound is measured in which unit?

-Added by Aman Senapati Science » Sound

Answer:

priyanshu kumar

Decibel[dB]

-Answered by priyanshu kumar On 23 December 2019:09:09:35 AM

Question 48. Asked on :20 December 2019:06:40:01 PM

What is the unit of frequency?

-Added by Aman Senapati Science » Sound

Answer:

Rohit Rajput

Hazards.

-Answered by Rohit Rajput On 29 December 2019:10:19:23 AM

Question 49. Asked on :15 December 2019:10:34:06 AM

What is the distance between our Earth and the Sun?

-Added by Aman Senapati Science » Star And Solar System

Answer:

priyanshu kumar

1.4 million kilometres.

-Answered by priyanshu kumar On 23 December 2019:09:12:46 AM

Question 50. Asked on :15 December 2019:10:31:52 AM

In which year Pluto and Xena come under the category of Dwarf Planet?

-Added by Aman Senapati Science » Stars And The Solar System

Answer:

Rohit Rajput

[2003 UB]

-Answered by Rohit Rajput On 29 December 2019:10:20:03 AM

Question 51. Asked on :15 December 2019:10:27:55 AM

Define globular clusters?

-Added by Aman Senapati Science » Star And Solar System

Answer:

Rohit Rajput

The clusters of stars in the constellation are called globular clusters.

-Answered by Rohit Rajput On 29 December 2019:10:20:13 AM

Question 52. Asked on :15 December 2019:10:24:05 AM

Which Dwarf planet is biggest in our galaxy?

-Added by Aman Senapati Science » Star And Solar System

Answer:

Rohit Rajput
Pluto.

-Answered by Rohit Rajput On 29 December 2019:10:20:30 AM

Question 53. Asked on :15 December 2019:10:23:03 AM

Which star appears stationary?

-Added by Aman Senapati Science » Star And Solar System

Answer:

Rohit Rajput

Pole star.

-Answered by Rohit Rajput On 29 December 2019:10:20:53 AM

Question 54. Asked on :15 December 2019:10:21:39 AM

How many constellation have been recognized and named?

-Added by Aman Senapati Science » Star And Solar System

Answer:

Rohit Rajput

-Answered by Rohit Rajput On 29 December 2019:10:21:38 AM

Question 55. Asked on :15 December 2019:10:19:41 AM

On which temperature stars starts shining?

-Added by Aman Senapati Science » Star And Solar System

Answer:

Rohit Rajput

2 to 5 million degree celsius.

-Answered by Rohit Rajput On 29 December 2019:10:21:50 AM

Question 56. Asked on :15 December 2019:10:03:19 AM

What is the temperature of moon during sunshines?

-Added by Aman Senapati Science » Stars And The Solar System

Answer:

Rohit Rajput

123 degree C [253 Degree F]

-Answered by Rohit Rajput On 29 December 2019:10:22:03 AM

Question 57. Asked on :14 December 2019:08:18:29 PM

What is the another name of pole star?

-Added by Aman Senapati Science » Stars And The Solar System

Answer:

Rohit Rajput

Dhruvatara.

-Answered by Rohit Rajput On 29 December 2019:10:22:21 AM

Question 58. Asked on :14 December 2019:08:16:57 PM

Neil Armstrong was landed on moon on which day?

-Added by Aman Senapati Science » Stars And The Solar System

Answer:

priyanshu kumar

Dhruvatara.

-Answered by priyanshu kumar On 23 December 2019:09:15:34 AM

Question 59. Asked on :14 December 2019:08:15:36 PM

How much distance is having in between our Earth and Moon?

-Added by Aman Senapati Science » Star And Solar System

Answer:

Rohit Rajput

3,84,400 km.

-Answered by Rohit Rajput On 29 December 2019:10:22:37 AM

Question 60. Asked on :14 December 2019:08:14:35 PM

How many hours having in a solar day?

-Added by Aman Senapati Science » Star And Solar System

Answer:

Rohit Rajput

24 hours.

-Answered by Rohit Rajput On 29 December 2019:10:23:28 AM

Question 61. Asked on :14 December 2019:08:09:05 PM

Define phases of moon?

-Added by Aman Senapati Science » Star And Solar System

Answer:

Rohit Rajput

The day-to-day changes in the size and shape of the moon as seen during a month are called phases of moon.

-Answered by Rohit Rajput On 29 December 2019:10:23:56 AM

Question 62. Asked on :14 December 2019:08:04:59 PM

What is the name of the day on which more than half of the moon is visible?

-Added by Aman Senapati Science » Star And Solar System

Answer:

Rohit Rajput

Gibbous moon.

-Answered by Rohit Rajput On 29 December 2019:10:24:11 AM

Question 63. Asked on :14 December 2019:08:01:50 PM

What is the name of the day on which a small portion of moon is visible?

-Added by Aman Senapati Science » Star And Solar System

Answer:

Rohit Rajput

Crescent moon.

-Answered by Rohit Rajput On 29 December 2019:10:24:26 AM

Question 64. Asked on :14 December 2019:08:00:26 PM

What is the name of the day on which a perfectly moon is visible?

-Added by Aman Senapati Science » Star And Solar System

Answer:

Rohit Rajput

Full moon day.

-Answered by Rohit Rajput On 29 December 2019:10:24:46 AM

Question 65. Asked on :14 December 2019:07:58:15 PM

What is the name of the day on which moon is not visible?

-Added by Aman Senapati Science » Star And Solar System

Answer:

Rohit Rajput

New moon day.

-Answered by Rohit Rajput On 29 December 2019:10:25:03 AM

Question 66. Asked on :14 December 2019:07:52:39 PM

How many stars are having in our galaxy?

-Added by Aman Senapati Science » Star And Solar System

Answer:

Rohit Rajput

100 billion stars.

-Answered by Rohit Rajput On 29 December 2019:10:25:19 AM

Question 67. Asked on :14 December 2019:07:51:25 PM

What do mean by Supercluster?

-Added by Aman Senapati Science » Star And Solar System

Answer:

Rohit Rajput

The Milky Way itself is only a tiny part of grouping of galaxies called a Supercluster.

-Answered by Rohit Rajput On 29 December 2019:10:25:31 AM

Question 68. Asked on :14 December 2019:07:50:34 PM

What is the shape of our galaxy?

-Added by Aman Senapati Science » Star And Solar System

Answer:

Rohit Rajput

Our galaxy is a spiral type galaxy.

-Answered by Rohit Rajput On 29 December 2019:10:26:53 AM

Question 69. Asked on :14 December 2019:07:46:52 PM

What is Astronomy and Astronomers?

-Added by Aman Senapati Science » Star And Solar System

Answer:

Rohit Rajput

The science that deals with the study of universe is called Astronomy and The scientists who study the universe are known as Astronomers.

-Answered by Rohit Rajput On 29 December 2019:10:28:41 AM

Question 70. Asked on :14 December 2019:07:43:12 PM

What is the another name of Milky Way Galaxy?

-Added by Aman Senapati Science » Stars And The Solar System

Answer:

Rohit Rajput

Akash Ganga

-Answered by Rohit Rajput On 29 December 2019:10:28:55 AM

Question 71. Asked on :14 December 2019:07:15:05 PM

Why our galaxy known as 'Milky Way Galaxy'?

-Added by Aman Senapati Science » Stars And The Solar System

Answer:

Rohit Rajput

Our galaxy is known as Milky Way Galaxy because it looks like a trail of milk split across the sky.

-Answered by Rohit Rajput On 29 December 2019:10:29:07 AM

Question 72. Asked on :10 December 2019:07:39:51 PM

What is sound?

-Added by Aman Senapati Science » Sound

Answer:

Suraj Kumar

Sound is a form of energy which is produced by vibration.

-Answered by Suraj Kumar On 11 December 2019:08:27:41 AM

Question 73. Asked on :10 December 2019:07:13:00 PM

What are the types of instrument?

-Added by Aman Senapati Science » Sound

Answer:

priyanshu kumar

Wind Instrument

Stringed Instrument

Percussion instruments

-Answered by priyanshu kumar On 11 December 2019:08:23:41 AM

Question 74. Asked on :10 December 2019:06:39:20 PM

What is the full form of LED?

-Added by Aman Senapati Science » Chemical Effects Of Electric Current

Answer:

Suraj Kumar

Light Emitting Diode.

-Answered by Suraj Kumar On 11 December 2019:08:28:08 AM

Question 75. Asked on :10 December 2019:06:26:11 PM

which physicists first calculated the speed of sound?

-Added by Aman Senapati Science » Sound

Answer:

Suraj Kumar

GIOVANI ALFONSO BORELLI AND VINCENZO VIVIANI

-Answered by Suraj Kumar On 11 December 2019:08:28:28 AM

Question 76. Asked on :10 December 2019:06:18:57 PM

What are the parts of human ear?

-Added by Aman Senapati Science » Sound

Answer:

priyanshu kumar

1]Outer ear.

2]middle ear.

3]Inner ear.

-Answered by priyanshu kumar On 11 December 2019:08:24:07 AM

Question 77. Asked on :10 December 2019:06:15:02 PM

What are the kinds of friction?

-Added by Aman Senapati Science » Friction

Answer:

priyanshu kumar

1]Static friction.

2]Sliding friction.

3]Rolling friction.

-Answered by priyanshu kumar On 11 December 2019:08:24:16 AM

Question 78. Asked on :10 December 2019:06:09:08 PM

What are the causes of friction?

-Added by Aman Senapati Science » Friction

Answer:

Suraj Kumar

1] Due to the interlocking between the surfaces.

2]Due to force of adhesion between the two surfaces.

-Answered by Suraj Kumar On 11 December 2019:08:28:57 AM

Question 79. Asked on :10 December 2019:05:50:38 PM

Define Electrode?

-Added by Aman Senapati Science » Chemical Effect Of Electric Current

Answer:

Suraj Kumar

The rod[or plate]through which electric current either enters or leaves an electrolytic solution.

-Answered by Suraj Kumar On 11 December 2019:08:29:11 AM

Question 80. Asked on :21 November 2019:09:07:23 AM

suggest three measure to protected ourselves lighting?

-Added by Sohail alam Science » Our Body

Answer:

Sohail alam
Three measures to stay protected from lightning are: (i) Stay indore or under covered area. (ii) Don't take bath during lightning. Avoid any contact with running water.

-Answered by Sohail alam On 21 November 2019:09:09:20 AM

Question 81. Asked on :21 November 2019:09:04:45 AM

Explain why charged body loses its if we touch it with our hand

-Added by Sohail alam Science » Our Body

Answer:

priyanshu kumar
When we touch a charged object, our body conducts its charges to the earth. That is why a charged body loses its charge, if we touch it with our hand. This phenomenon is known as electric discharge.

-Answered by priyanshu kumar On 02 December 2019:08:32:55 AM

Question 82. Asked on :15 November 2019:03:22:28 PM

how do frogs respiration?

-Added by Suman Kumari Science » Science

Answer:

Suraj Kumar

Lungs and skins.

-Answered by Suraj Kumar On 21 November 2019:08:38:47 AM

Question 83. Asked on :15 November 2019:03:20:29 PM

What is one breath?

-Added by Suman Kumari Science » Science

Answer:

Suraj Kumar

A breath means on inhalation and exhalation plus.

-Answered by Suraj Kumar On 21 November 2019:08:39:12 AM

Question 84. Asked on :15 November 2019:03:18:33 PM

Name the respirately organised in cockroach?

-Added by Suman Kumari Science » Science

Answer:

Suraj Kumar

Spiracles.

-Answered by Suraj Kumar On 21 November 2019:08:39:21 AM

Question 85. Asked on :15 November 2019:03:05:30 PM

Variation in the breathing rate during different activities?

-Added by Suman Kumari Science » Science

Answer:

Suraj Kumar

Sleeping ,learning, cloth-washing , running ,walking.

-Answered by Suraj Kumar On 21 November 2019:08:39:31 AM

Question 86. Asked on :15 November 2019:03:04:35 PM

What is breathing rate?

-Added by Suman Kumari Science » Science

Answer:

Suraj Kumar

The number of times a person breathes in a minute is termed as a breathing rate.

-Answered by Suraj Kumar On 21 November 2019:08:39:44 AM

Question 87. Asked on :15 November 2019:03:03:43 PM

What is breathing?

-Added by Suman Kumari Science » Science

Answer:

Suman Kumari
Breathing is the process of moving air into and out of the lungs to facilitate gas exchange with the internal environment, mostly by bringing in oxygen and flushing out carbon dioxide.

-Answered by Suman Kumari On 15 November 2019:03:11:23 PM

Question 88. Asked on :15 November 2019:03:02:35 PM

What product the chest cavity?

-Added by Suman Kumari Science » Science

Answer:

Suraj Kumar

This cavity is surrounded by ribs on the side rib cage.

-Answered by Suraj Kumar On 21 November 2019:08:40:21 AM

Question 89. Asked on :15 November 2019:02:58:58 PM

Where lungs are situated ?

-Added by Suman Kumari Science » Science

Answer:

Suraj Kumar

Lungs are situated in chest cavity.

-Answered by Suraj Kumar On 21 November 2019:08:40:29 AM

Question 90. Asked on :09 November 2019:06:43:47 PM

What are the limitations of Dobereiner's Triads?

-Added by Akki chauhan Science » Periodic Classification Of Elements

Answer:

Rohit Rajput

Limitations of Dobereiner's classification: Dobereiner could find only three triads; .i.e total of 9 elements only. However the total number of elements were more than that of those encompassed in Dobereiner's Triad. Thus, Dobereiner's could not be classify most of the elements known at that time.

-Answered by Rohit Rajput On 10 November 2019:06:06:48 PM

Question 91. Asked on :08 November 2019:03:38:28 PM

What product the chest cavity?

-Added by Suman Kumari Science » Science

Answer:

priyanshu kumar
Chest Cavity and Lung and Airway Disorders - Learn about from the MSD Manuals - Medical Consumer Version.

-Answered by priyanshu kumar On 10 November 2019:03:07:34 PM

Question 92. Asked on :08 November 2019:03:37:23 PM

What is Diaphagm?

-Added by Suman Kumari Science » Science

Answer:

Akki chauhan
The diaphragm is a thin skeletal muscle that sits at the base of the chest and separates the abdomen from the chest. It contracts and flattens when you inhale. This creates a vacuum effect that pulls air into the lungs. When you exhale, the diaphragm relaxes and the air is pushed out of lungs.

-Answered by Akki chauhan On 09 November 2019:06:26:04 PM

Question 93. Asked on :08 November 2019:03:35:50 PM

Where lungs are situated?

-Added by Suman Kumari Science » Science

Answer:

Akki chauhan
The lungs are a pair of spongy, air-filled organs located on either side of the chest (thorax). The trachea (windpipe) conducts inhaled air into the lungs through its tubular branches, called bronchi. The bronchi then divide into smaller and smaller branches (bronchioles), finally becoming microscopic.

-Answered by Akki chauhan On 09 November 2019:06:26:14 PM

Question 94. Asked on :08 November 2019:03:35:01 PM

What is nasal cavity?

-Added by Suman Kumari Science » Science

Answer:

Akki chauhan
The nasal cavity is a large, air-filled space above and behind the nose in the middle of the face. The nasal septum divides the cavity into two fossae. Each fossa is the continuation of one of the two nostrils. ... The paranasal sinuses surround and drain into the nasal cavity.

-Answered by Akki chauhan On 09 November 2019:06:26:27 PM

Question 95. Asked on :08 November 2019:03:30:09 PM

write the difference between anaerobic and aerobic respiration?

-Added by Suman Kumari Science » Science

Answer:

Akki chauhan
As we touched on, the main difference between aerobic and anaerobic respiration is whether or not oxygen is present. Aerobic respiration needs oxygen to occur, while anaerobic does not. ... During aerobic respiration, carbon dioxide, water, and ATP are produced.

-Answered by Akki chauhan On 09 November 2019:06:26:38 PM

Question 96. Asked on :08 November 2019:03:27:55 PM

Which acid is present in ant bite?

-Added by Suman Kumari Science » Science

Answer:

priyanshu kumar
Formic acid.

-Answered by priyanshu kumar On 10 November 2019:03:08:19 PM

Question 97. Asked on :08 November 2019:03:25:09 PM

What is the function of retina in human eye.

-Added by Nishant Verma Science » Gk

Answer:

priyanshu kumar
The retina acts as a screen on which the image is formed in the eye. The retina has a large number of light-sensitive cells. When the image falls on the retina then these light-sensitive cells get activated and generate electrical signals.

-Answered by priyanshu kumar On 10 November 2019:03:08:44 PM

Question 98. Asked on :08 November 2019:03:24:50 PM

What is the effect of DNA copying, which is not perfectly accurate, on the reproduction process?

-Added by Nishant Verma Science » Gk

Answer:

Suraj Kumar

The DNA copying which is not perfectly accurate in the reproduction process results in variations in

-Answered by Suraj Kumar On 09 November 2019:08:45:35 AM

Question 99. Asked on :08 November 2019:03:24:38 PM

"Energy flow in a food chain is unidirectional" Justify this statement.

-Added by Nishant Verma Science » Gk

Answer:

Suraj Kumar

The flow of energy in the ecosystem is said to be unidirectional because the energy lost as heat from the living organisms of a food chain cannot be reused by plants in photosynthesis.

-Answered by Suraj Kumar On 09 November 2019:08:45:45 AM

Question 100. Asked on :08 November 2019:03:23:04 PM

Define oscillation?

-Added by Suman Kumari Science » Science

Answer:

Suraj Kumar
Oscillation is the repetitive variation, typically in time, of some measure about a central value (often a point of equilibrium) or between two or more different states. The term vibration is precisely used to describe mechanical oscillation.

-Answered by Suraj Kumar On 09 November 2019:08:46:00 AM

Question 101. Asked on :08 November 2019:03:24:02 PM

A concave mirror of focal length 15 cm can form a magnified, erect as well as inverted image of an object placed in front of it." Justify this statement stating the position of the object with respect to the pole of the mirror in both the cases for obtaining the images.

-Added by Nishant Verma Science » Gk

Answer:

Suraj Kumar

For magnified and erect image the object is placed between pole P and focus F. For magnified and inverted image the object is placed either at focus or anywhere between F and C.

-Answered by Suraj Kumar On 09 November 2019:08:46:24 AM

Question 102. Asked on :08 November 2019:03:23:46 PM

What kind of combustion is observed in alkanes? Why do air holes of a gas burner have to be adjusted when vessel being heated gets blackened by the flame?

-Added by Nishant Verma Science » Gk

Answer:

Rohit Rajput

Alkanes are saturated hydrocarbons and generally burn in air with a blue, non-sooty flame.

If the bottoms of the cooking vessels in our homes are getting blackened, it shows that the air holes of the gas stove are getting blocked and the fuel is not burning completely.

-Answered by Rohit Rajput On 10 November 2019:06:10:10 PM

Question 103. Asked on :08 November 2019:03:23:35 PM

How is menarche different from menopause?

-Added by Nishant Verma Science » Gk

Answer:

Suraj Kumar

The first occurrence of menstruation at the age of 12 in females is called menarche. Menarche is the beginning of the reproductive life of a girl. Menstruation stops when a woman reaches the age of 50 approx. At this age she loses her ability to bear child in her womb, i.e., she becomes infertile. This stage of permanent stoppage of menstruation is called the menopause. Thus, reproductive life of a woman starts at menarche and ends at menopause.

-Answered by Suraj Kumar On 09 November 2019:08:46:47 AM

Question 104. Asked on :08 November 2019:03:23:24 PM

Write the molecular formula of first two members of homologous series having functional group – OH.

-Added by Nishant Verma Science » Gk

Answer:

Suraj Kumar

The general formula for the homologous series of functional group −OH is C_nH_2n+1OH.

The two consecutive members of this series are:

a. CH₃OH(Methanol)

b. CH₃CH₂OH (Ethanol)

where n is 1 and 2 respectively

The molecular formula for both of them are CH₄O and C₂H₆O.

-Answered by Suraj Kumar On 09 November 2019:08:46:59 AM

Question 105. Asked on :08 November 2019:03:23:10 PM

What is meant by acquired and inherited traits? Explain with one example each.

-Added by Nishant Verma Science » Gk

Answer:

Suraj Kumar
Inherited Trait: A trait or characteristic of an organism which is caused by a change in its genes is called an inherited trait. Example: The characteristics received by a child from its parents like the son inherits his father’s red hair.

-Answered by Suraj Kumar On 09 November 2019:08:47:18 AM

Question 106. Asked on :08 November 2019:03:22:55 PM

What is a solenoid? Draw the pattern of magnetic Field lines of a solenoid through which a steady current flows. What does the pattern of field lines‟? Inside the solenoid indicate?

-Added by Nishant Verma Science » Gk

Answer:

Suraj Kumar
Solenoid can be defined as a coil of many circular turn of insulated copper wire wrapped in cylindrical structure.

-Answered by Suraj Kumar On 09 November 2019:08:47:27 AM

Question 107. Asked on :08 November 2019:03:22:43 PM

Dark reaction of photosynthesis does not need light. Do plants undergo dark reaction at night? Explain.

-Added by Nishant Verma Science » Current Gk

Answer:

Akki chauhan
Dark reaction does not mean that it occurs in the absence of light i.e., at night. Infact, it is the reaction occuring simultaneously with light reaction. It a chemical process occurring independent of light. This reaction is completely based on enzymes.

-Answered by Akki chauhan On 09 November 2019:07:10:02 PM

Question 108. Asked on :08 November 2019:03:22:27 PM

What is the important function of presence of ozone in earth’s atmosphere?

-Added by Nishant Verma Science » Gk

Answer:

Akki chauhan
Ozone is the Earth’s natural process for all life forms. It shields our planet from the UV radiations, as these ultraviolet rays are harmful for all the living things. Therefore, any change in the size of this layer will automatically affect the life of people, plants and animals living on earth.

-Answered by Akki chauhan On 09 November 2019:07:10:10 PM

Question 109. Asked on :08 November 2019:03:21:08 PM

Explain why a ray of light passing through the centre of curvature of concave minor gets reflected along the same path.

-Added by Nishant Verma Science » Current Gk

Answer:

Akki chauhan
The light falling on the centre of curvature is reflected back along the same path because incident ray falls on the mirror along the normal to the reflecting surface.

-Answered by Akki chauhan On 09 November 2019:07:10:19 PM

Question 110. Asked on :08 November 2019:03:17:36 PM

What is rusting?

-Added by Suman Kumari Science » Science

Answer:

Suraj Kumar
Rust is an iron oxide, a usually red oxide formed by the redox reaction of iron and oxygen in the presence of water or air moisture. Several forms of rust are distinguishable both visually and by spectroscopy, and form under different circumstances.

-Answered by Suraj Kumar On 09 November 2019:08:48:15 AM

Question 111. Asked on :08 November 2019:03:16:32 PM