Question

Identify the gases in each of the following : [5]

(i) Sodium carbonate reacts with dil.H2SO4

to liberate a gas which shows no

effect on acidi ed KMnO4

.

(ii) A gas which gives dense white fume with dil.HCl acid.

(iii) A gas which turns potassium iodide paper brown.

(iv) A gas which turns moist cobalt chloride paper blue to pink.

(v) A gas which turns moist blue litmus paper red and then bleaches it in excess

gas.​

Answer 1

Explanation:

(i) Sodium carbonate reacts with dil.H2SO4  to liberate a gas which shows no  effect on acidied KMnO4

 

(ii) A gas which gives dense white fume with dil.HCl acid.

(iii) A gas which turns potassium iodide paper brown.

(iv) A gas which turns moist cobalt chloride paper blue to pink.

(v) A gas which turns moist blue litmus paper red and then bleaches it in excess