1(xii)
Ammonia gas is collected by downward displacement of air since ammonia is:
- (a)very slightly soluble in water.
- (b)heavier than air.
- (c)lighter than air.
- (d)insoluble in water.
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lighter than air
Reason — Ammonia gas is lighter than air and hence collected by the downward displacement of air. Ammonia is not collected over water since it is highly soluble in water.