Asked/Added Questions From NCERT: Chemistry

-Answered by Suraj Kumar On 10 November 2019:03:52:38 PM

 Uttarakhand

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

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

 Selenium.

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

-Answered by priyanshu kumar On 20 October 2019:09:51:45 AM

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

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

 Trivantepuram.

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

 Archery.

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

 Berlin.

-Answered by priyanshu kumar On 10 November 2019:03:26:19 PM

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

 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

 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.

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

 Methanoic acid is present in ant sting.

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

 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

 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

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

 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

 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

 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

 Silicon dioxide.

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

 Father of Antoine Lavoisier is "Jean Antoinie Lavoisier".

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

 vitamin C

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

 Toxin

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

 Sulphur

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

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

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