Same chapter3 marksDifficulty: Medium
Describe the fountain experiment with hydrogen chloride and state what it demonstrates.
Study of Compounds: Hydrogen Chloride
2 marksDifficulty: Easy
State why concentrated sulphuric acid is used in the laboratory preparation of hydrogen chloride gas.
Original Khojo Papers practice question — not from a past board paper.
Answer
Concentrated sulphuric acid is a strong, non-volatile acid. On heating with sodium chloride it displaces the more volatile hydrogen chloride, which escapes as a gas.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
A less volatile acid displaces a more volatile acid from its salt.
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