Question

In the activity shown in the diagram, if the climate is humid, the role of calcium chloride taken in the guard tube is to :

(a) Absorb the evolved gas

(b) Warm up the gas

(c) Dry the gas

(d) Absorb chloride ions from the evolved gas

Answer 1

Correct answer is (c) Dry the gas

2 Nacl + H₂SO₄ \(\overset{\triangle}{\longrightarrow}\) Na₂SO₄ + 2HCl↑

Calcium chloride is used to dry the HCl gas.

Calcium chloride is highly hygroscopic in nature.