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Asked/Added Questions From NCERT: Chemistry


Question 1. Asked on :23 September 2019:08:42:26 PM

 what is full form of DIY

-Added by Akki chauhan Chemistry » Full Forms

Answer:

priyanshu kumar
Do it Yourself

-Answered by priyanshu kumar On 01 October 2019:10:25:51 AM


Question 2. Asked on :13 September 2019:07:09:35 PM

Pappu Karki, the popular Kumaoni folk singer has passed away. He was native of which state?

-Added by Akki chauhan Chemistry » Chemistry

Answer:

priyanshu kumar

 Uttarakhand


-Answered by priyanshu kumar On 03 October 2019:12:34:18 PM


Question 3. Asked on :13 September 2019:07:03:15 PM

Write is not a chemical change ?

-Added by Akki chauhan Chemistry » Chemistry

Answer:

priyanshu kumar
Crystallization of table salt from sea water

-Answered by priyanshu kumar On 03 October 2019:12:34:52 PM


Question 4. Asked on :13 September 2019:07:02:51 PM

 Which one of the following non metals is not a poor conductor of electricity

-Added by Akki chauhan Chemistry » Chemistry

Answer:

priyanshu kumar

 Selenium.


-Answered by priyanshu kumar On 03 October 2019:12:35:01 PM


Question 5. Asked on :02 September 2019:05:17:03 PM

who was the first president of America?

-Added by Nishant Verma Chemistry » Gk

Answer:

Akki chauhan
George Washington.

-Answered by Akki chauhan On 02 September 2019:08:54:01 PM


Question 6. Asked on :02 September 2019:12:10:35 PM

  1. Who is the inventor of electricity?

-Added by Nishant Verma Chemistry » Gk,

Answer:

Harshita Rathore
Benjamin Franklin

-Answered by Harshita Rathore On 02 September 2019:01:51:03 PM


Question 7. Asked on :25 August 2019:09:04:23 AM

 What is currency of Bardados?

-Added by Harshita Rathore Chemistry » Gk

Answer:

Shivang Gupta
 Barbadian dollar. 

-Answered by Shivang Gupta On 25 August 2019:02:45:12 PM


Question 8. Asked on :24 August 2019:01:06:41 PM

 Write the capital of kerla? 

-Added by Harshita Rathore Chemistry » Gk

Answer:

Akki chauhan

 Trivantepuram.

-Answered by Akki chauhan On 24 August 2019:02:46:41 PM


Question 9. Asked on :24 August 2019:11:10:03 AM

National game of Bhutan is

-Added by Akki chauhan Chemistry » G.k

Answer:

Akki chauhan

 Archery.

-Answered by Akki chauhan On 24 August 2019:11:11:52 AM


Question 10. Asked on :24 August 2019:09:50:24 AM

Who is Governor of Chhattisgarh.

-Added by Akki chauhan Chemistry » G.K

Answer:

Akki chauhan

Balram Dass Tandon.

-Answered by Akki chauhan On 24 August 2019:09:51:10 AM


Question 11. Asked on :21 August 2019:05:00:29 PM

What is the common name of POP, and also write its uses?

-Added by Himanshi Verma Chemistry » Ch 2

Answer:

Himanshi Verma
The common name of POP(Plaster of Paris) is Calcium sulphate hemihydrate.

It uses are:-

1. Its used for supporting fractured bones.

2. It is used for making sufaces smooth.

3. It is used in many material and making in toys.

4. It is used for making statues.

-Answered by Himanshi Verma On 21 August 2019:05:15:13 PM


Question 12. Asked on :21 August 2019:04:55:33 PM

 Write the formula of washing soda and also write its uses?

-Added by Himanshi Verma Chemistry » Ch 2

Answer:

Himanshi Verma

 The formula of washing soda is Na2Co3.10H2o. Recrystallisation of sodium carbonate gives  washing soda. It is a basic salt.

Its uses are:-

1. It is used in glass, soap and paper industries.

2. It is used in manufacture of Borax.

3. It is used as cleaning agent for domestic purpose.

4. It is used for removing permanent hardness of water.

-Answered by Himanshi Verma On 21 August 2019:04:56:37 PM


Question 13. Asked on :21 August 2019:04:53:16 PM

 What is chlor- alkali reaction?

-Added by Himanshi Verma Chemistry » Ch 2

Answer:

Himanshi Verma

 When electricity is passed through an aqueous solution of sodium chloride it decomposes to form sodium hydroxide. The process is called the chlor-alkali alkali process because of the products formed: chlor for chlorine and alkali for Sodium Hydroxide. Chlorine gas is given off at the anode and hydrogen gas at the cathode.


An aqueous solution of sodium chloride is called brine.
2NaCl (aq) + 2H2O(l) ---(electrolysis)---> 2NaOH(aq) + Cl2(g) + H2(g).

-Answered by Himanshi Verma On 21 August 2019:04:54:18 PM


Question 14. Asked on :21 August 2019:04:51:27 PM

 Name the acid present in ant sting.

-Added by Himanshi Verma Chemistry » Acid And Base

Answer:

Himanshi Verma

 Methanoic acid is present in ant sting.

-Answered by Himanshi Verma On 21 August 2019:04:52:47 PM


Question 15. Asked on :21 August 2019:04:49:16 PM

 What is electrovalent compounds?

-Added by Himanshi Verma Chemistry » Ch - 3

Answer:

Himanshi Verma

 The compunds formed by the transfer of electrons from a metal to a non- metal are called ionic compounds or electrovalent compounds.

-Answered by Himanshi Verma On 21 August 2019:04:50:17 PM


Question 16. Asked on :21 August 2019:04:46:17 PM

 How carbon attain noble gas configuration?

-Added by Himanshi Verma Chemistry » Carbon And Its Compound

Answer:

Himanshi Verma

 Carbon has 4 electrons in its outer most orbits and in order to attain the noble gas configuration it should either lose the 4 electrons and gain helium gas configuration or gain 4 electrons to obtain neon gas configuration

But is very difficult for it to gain or lose 4 electrons as very high energy is required to remove 3rd or 4th electrons and also it's very difficult for it to gain 4 electrons and hold it.
Hence carbon atom undergoes covalent bonding with other atoms to become stable. 

-Answered by Himanshi Verma On 21 August 2019:04:48:24 PM


Question 17. Asked on :21 August 2019:04:43:17 PM

Write the limitations of Mendeleev's Classification.

-Added by Himanshi Verma Chemistry » Periodic Classification Of Elements

Answer:

Himanshi Verma

 1. Position of isotopes could not be explained.

2. No fixed position for hydrogen.

3. Wrong order of atomic masses of some elements could not be explained.

-Answered by Himanshi Verma On 21 August 2019:04:44:39 PM


Question 18. Asked on :21 August 2019:04:32:06 PM

What is Calcination?

-Added by Himanshi Verma Chemistry » CH 3

Answer:

Himanshi Verma

 The carbonate ores are changed into oxides by heating strongly in limited air. This process is called Calcination.

-Answered by Himanshi Verma On 21 August 2019:04:32:51 PM


Question 19. Asked on :20 August 2019:07:40:49 PM

What are the limitations of Mendeleev's classification?

-Added by Himanshi Verma Chemistry » Periodic Classification Of Elements

Answer:

Himanshi Verma

 1. No, fixed position can be given to hydrogen in the Mendeleev's classification.

2. There are no any place for isotopes.

3. It was not possible to predict how many elements could be discovered between two elements.  

-Answered by Himanshi Verma On 20 August 2019:07:44:51 PM


Question 20. Asked on :19 August 2019:10:49:13 PM

 What is the chemical name of sand?

-Added by Himanshi Verma Chemistry » Ch 2

Answer:

Himanshi Verma

 Silicon dioxide.

-Answered by Himanshi Verma On 19 August 2019:10:56:21 PM


Question 21. Asked on :28 June 2019:03:44:38 PM

Father of is Antoine Lavoisier - source 

-Added by Md Sarfaraz Nashtar Chemistry » Who Is Father Of Chemistry?

Answer:

Himanshi Verma

 Father of Antoine Lavoisier is "Jean Antoinie Lavoisier".

-Answered by Himanshi Verma On 01 July 2019:07:27:27 PM


Question 22. Asked on :24 January 2019:05:17:44 PM

वह कौन सा विटामिन है जो गर्म होने पर नष्ट हो जाता है ?

-Added by Himanshi Verma Chemistry » G.k

Answer:

Akki chauhan

 vitamin C

-Answered by Akki chauhan On 05 February 2019:09:57:59 AM


Question 23. Asked on :23 January 2019:05:12:06 PM

 जहरील पधार्थो को क्या कहा जाता है?

-Added by Himanshi Verma Chemistry » G.k

Answer:

Akki chauhan

 Toxin

-Answered by Akki chauhan On 05 February 2019:09:57:55 AM


Answer:

Akki chauhan

 Sulphur

-Answered by Akki chauhan On 05 February 2019:09:57:50 AM


Question 25. Asked on :14 January 2019:05:43:06 PM

 How can we seprate a mixture of salt and Ammonium Chloride?

-Added by Himanshi Verma Chemistry » Is Matter Around Us Pure

Answer:

Master Purushottam
By the process of sublimation

-Answered by Master Purushottam On 24 August 2019:12:02:19 AM


Question 26. Asked on :14 January 2019:09:31:13 AM

 World's first Atomic Energy Plant.

-Added by Rohit Rajput Chemistry » First In The World

Answer:

Master Purushottam
In U.S.A

-Answered by Master Purushottam On 23 August 2019:11:50:20 PM


 

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