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During the preparation of hydrogen chloride gas on a humid day, the gas is usually passed through a guard tube containing calcium chloride. The role of $\ce{CaCl2}$ taken in guard tube is to
- (a)Absorb the evolved gas
- (b)Moisten the gas
- (c)Absorb moisture from the gas
- (d)Absorb chloride ions from the evolved gas
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(C)/ Absorb moisture from the gas (1 Mark)