When ammonia is passed over heated CuO, it is oxidized to :

N H O_{2}

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N_{2} O

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N_{2}

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N O_{2}

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Solution

The correct option is C $N_{2}$
Option (C) is correct.
When ammonia is passed over heated $C u O$ , it is oxidized to $N_{2}$ and $C u O$ is reduced to $C u$ .
$2 N H_{3} + 3 C u O ⟶ N_{2} + 3 C u + 3 H_{2} O$

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Pure Nitrogen can be obtained by passing ammonia vapours over heated copper (II) oxide $(C u O)$ .

(C u O)

N H_{3}

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