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Reaction with Metal Oxides

A reddish bro...

Question

A reddish brown solid metallic compound X is formed on reaction of ammonia with copper oxide and Y gas is released . Identify X and Y based on the information provided.

A

X: Mg ; Y:

O_{2}

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B

X: Na ; Y:

H_{2}

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C

X: Cu ; Y:

N_{2}

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D

X: Cu ; Y:

{C O}_{2}

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Solution

The correct option is C X: Cu ; Y: $N_{2}$
Ammonia reduces heated metallic oxides to give metals, water vapours and nitrogen gas. X is copper (Cu) and the gas released is nitrogen.

The chemical equation is given as:
2 ${N H}_{3}$ (g) + 3CuO (s) → 3Cu (s) + 3 $H_{2} O$ (l) + $N_{2}$ (↑)

The correct answer is option (a).

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