Chemistry
Which gas is evolved when ammonia gas is passed over buff yellow PbO?
- N2O
- NO
- N2
- NO2
Ammonia
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Answer
N2
Reason — When ammonia gas is passed over buff yellow PbO, ammonia reduces heated lead monoxide to greyish metallic lead with the liberation of nitrogen gas.
2NH3 + 3PbO ⟶ 3Pb + 3H2O + N2 ↑
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