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Ammonia

A metal X on ...

Question

A metal $X$ on heating in nitrogen gas gives $Y$ . $Y$ on treatment with $H_{2} O$ gives a colourless gas $Z$ . $Z$ when passed through chloroplatinic acid produces a yellow precipitate. $‘ Z^{'}$ is

M g (N O_{3})_{2}

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M g_{3} N_{2}

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{N H}_{3}

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M g O

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Solution

The correct option is C ${N H}_{3}$
$3 M g (X) + N_{2} \to M g_{3} N_{2} (Y)$

$M g_{3} N_{2} (Y) + H_{2} O \to 3 M g (O H)_{2} + 2 N H_{3} (Z)$

$H_{2} [P t C l_{6}] + 2 N H_{3} (Z) \to (N H_{4})_{2} [P t C l_{6}] (y e l l o w p r e c i p i t a t e) ↓$

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