Question

When any chloride is heated with conc. H_2SO_4, then HCl is obtained
While any bromide is heated with conc. H_2SO_4, then Br_2 is obtained and not HBr.

a) HCl is gas while HBr is a liquid

b) HCl is a liquid while HBr is a gas

c) HBr is a stronger reducing agent than HCl

d) Br_2 is a liquid and HCl is a gas.

Solution

Bromide is more strongly reducing. In the presence ofH_2SO_4 it will be reducing agent and reduce the sulphur atom.

Chloride can't reduce because chloride is not a strong agent to have reduction effect on H_2SO_4.

Therefore, option (c) is correct.