Dry HCl(g) can be prepared by passing the gas through fused CaCl2. The role of calcium chloride is to: a) Absorb the evolved gas. b) Moisten the gas c) Absorb moisture from the gas d) Absorb chloride Ion from the gas
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c) Absorb moisture from the gas
Calcium chloride is used as an absorbent in the guard tube while hydrogen chloride is being formed on a humid day as it can absorb the moisture present in the air. HCl corrosively reacts with water leading to the formation of hydrochloric acid as it is strongly acidic in nature. It gives out white fumes on reacting with moisture.
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