Identify C, D and E.

N H_{3}, H_{2}, N_{2}

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N_{2} O, N_{2}, O_{2}

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H_{2} O, N_{2}, C u

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M g, H_{2} O, N H_{3}

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Solution

The correct option is C $H_{2} O, N_{2}, C u$
When gaseous ammonia is passed over solid copper(II)oxide at high temperatures, nitrogen gas is formed
$2 N H_{3} + 3 C u O ⟶ N_{2} + 3 C u + 3 H_{2} O$
Water vapour are cooled and condensed, so (C) is water vapours.
Nitrogen is collected by downward displacement of water so (D) is nitrogen.
Brown Residue is Copper. So (E) is copper.

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Similar questions

Q. Balance the following equation:

C u O + N H_{3} \to N_{2} + H_{2} O + C u

The complete balanced equation is:

C u O + N H_{3} \to C u + N_{2} + H_{2} O

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C u O + N H_{3} ⟶ C u + H_{2} O + N_{2}

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