A) \[{{N}_{2}}\]
B) \[N{{O}_{2}}\]
C) \[NO\]
D) \[HN{{O}_{2}}\]
Correct Answer: A
Solution :
On passing ammonia gas over heated copper oxide, it gives nitrogen gas. \[3CuO+\underset{ammonia}{\mathop{2N{{H}_{3}}(g)}}\,\xrightarrow{{}}3Cu+{{N}_{2}}\uparrow +3{{H}_{2}}O\]
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