The impurities formed during laboratory preparation of dinitrogen from ammonium chloride and sodium nitride is/are:

H C l

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H N O_{3} a n d N O

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N O_{2}

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H N O_{2}

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Solution

The correct options are
B $H N O_{3} a n d N O$
C $N O_{2}$
$N H_{4} C l + N a N O_{2} \to N_{2} + N a C l + 2 H_{2} O$
The impurities formed are small amount of $N O$ and $H N O_{3}$ , which can be removed by passing gas through aqueous sulphuric acid containing potassium dichromate.

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