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Question

NH4X+NaNO2NH4NO2+NaX

Find out X.


A

O

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B

Cl

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C

OH

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D

Al

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Solution

The correct option is B

Cl


This is the laboratory method of preparing N2 gas:

Ammonium chloride and sodium nitrite are mixed together and heated.

NH4Cl+NaNO2NH4NO2+NaCl

Ammonium nitrite is formed and it is unstable.

NH4NO2N2+2H2O

So it decomposes to give nitrogen.


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