Question:medium
In order to prepare dry hydrogen chloride gas in a humid atmosphere, the gas produced is passed through a guard tube (drying tube) which contains:
In order to prepare dry hydrogen chloride gas in a humid atmosphere, the gas produced is passed through a guard tube (drying tube) which contains:
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Calcium chloride is commonly used to dry gases because it absorbs water and keeps gases dry.
Updated On: Feb 6, 2026
- Calcium chloride
- Calcium oxide
- Calcium hydroxide
- Calcium carbonate
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The Correct Option is A
Solution and Explanation
Hydrogen chloride gas is passed through a calcium chloride drying tube in a humid environment. Calcium chloride, being hygroscopic, absorbs moisture, thus drying the gas.The correct response is (a).
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