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Which of the following can be used to dry HCl gas?(a) Sodium hydroxide(b) Potassium hydroxide(c) Ammonium hydroxide(d) Concentrated sulphuric acidThe question was asked in final exam.I'd like to ask this question from P-Block Elements in portion P-Block Elements of Chemistry – Class 12

Answer» CORRECT answer is (d) CONCENTRATED sulphuric ACID

The explanation is: The hydroxides are basic in nature and hence, they will react with hydrogen CHLORIDE gas. THEREFORE, concentrated sulphuric acid is used as a drying agent for hydrogen chloride gas since it does not react with it.


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