Chemistry
Prateek added warm water to magnesium nitride, and a colourless gas evolved, which, when tested with phenolphthalein, turned it pink. The gas evolved is:
- Carbon dioxide
- Ammonia
- Nitrogen
- Hydrogen chloride
Ammonia
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Answer
Ammonia
Reason — On adding warm water to magnesium nitride, colourless, basic ammonia gas is evolved. When tested with phenolphthalein, a basic substance will turn the indicator pink, confirming the presence of a base.
Mg3N2 + 6H2O ⟶ 3Mg(OH)2 + 2NH3 [g]
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