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Preparation of Chlorine

A solution of...

Question

A solution of colourless salt $H$ on boiling with excess $N a O H$ produces a non-flammable gas. The gas evolution ceases after some time. Upon addition of $Z n$ dust to the same solution, the gas evolution restarts. The colourless salt $H$ is/are :

N H_{4} N O_{3}

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N H_{4} N O_{2}

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N H_{4} C l

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(N H_{4})_{2} S O_{4}

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Solution

The correct options are
A $N H_{4} N O_{3}$
B $N H_{4} N O_{2}$
Reactions of process:
A. $N H_{4} N O_{3} + N a O H \to N H_{3} + N a N O_{3} + H_{2} O$
$7 N a O H + N a N O_{3} + 4 Z n \to 4 N a_{2} Z n O_{2} + N H_{3} + 2 H_{2} O$
B. $N H_{4} N O_{2} + N a O H \to N a N O_{2} + N H_{3} + H_{2} O$
$3 Z n + 5 N a O H + N a N O_{2} \to 3 N a_{2} Z n O_{2} + N H_{3} + H_{2} O$
The gas is Ammonia and compound H can be both $N H_{4} N O_{3}$ and $N H_{4} N O_{2}$

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