Question

During the preparation of hydrogen chloride gas on a humid day,
the gas is usually passed through the guard tube containing calcium
chloride. The role of calcium chloride taken in the guard tube is to
(a) absorb the evolved gas
(b) moisten the gas
(c) absorb moisture from the gas
(d) absorb Cl– ions from the evolved gas

NCERT Class X
Science - Exemplar Problems

Chapter_Acids, Bases and Salts

Answer 1

Answer:

c

EXPLANATION:

IT IS A DRYING AGENT

Answer 2

answer : option (c) absorb moisture from the gas.

explanation : During the preparation of hydrogen chloride gas , the gas is usually passed through the guard tube containing calcium chloride , it is because calcium chloride is good drying agent. it helps to absorb moisture from the gas.

[ note : basically, common drying agents are anhydrous inorganic salts like CaCl2, AgCl3 etc... that acquire water of hydration when exposed to wet solution or moist air ]