Question

Identify the gas evolved in each of the following cases: (i) A colorless gas liberated on decomposition of nitric acid. (ii) Water is added to calcium carbide (iii) Dilute hydrochloric acid is added to Zinc sulphide. (iv) Dilute nitric acid is added to copper.

Answer 1

Hello buddy,

◆ Answers -

(i) Oxygen

(ii) Acetylene

(iii) Hydrogen sulphide

(iv) Nitric oxide

◆ Explaination-

(i) Decomposition of nitric acid liberates oxygen gas.

HNO3 ---> NO2 + H2O + O2

(ii) Calcium carbide on reaction with water gives acetylene.

CaC2 + H20 ---> CH2=CH2 + Ca(OH)2

(iii) Zinc sulphide on addition of acid liberates hydrogen sulphide gas.

ZnS + HCl ---> ZnCl2 + H2S

(iv) Copper on addition of dil. nitric acid gives nitric oxide as gas.

Cu + HNO3 ---> Cu(NO3)2 + NO + H2O

Hope this helps...

Answer 2

Hi friends here is your answer below

(i) oxygen

(ii) Acetylene

(iii) Hydrogen sulphide

(iv)Nitric oxide

Hope the answers are correct