Same chapter3 marksDifficulty: Medium
State three tests by which ammonia gas can be identified.
Study of Compounds: Ammonia
3 marksDifficulty: Medium
Why is ammonia dried over quicklime and not over concentrated sulphuric acid or phosphorus pentoxide?
Original Khojo Papers practice question — not from a past board paper.
Answer
Ammonia is a base and reacts with both concentrated sulphuric acid and phosphorus pentoxide, which are acidic drying agents, so it would be absorbed rather than dried. Quicklime, calcium oxide, is basic and does not react with ammonia.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
Anhydrous calcium chloride is also unsuitable, because it forms an addition compound with ammonia.
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