When a primary amine is heated with $NaNO_2/HCl$,a gas is evolved with brisk effervescence. Identify the gas.
$R-NH_2 \xrightarrow{NaNO_2/HCl} ..................$
$R-NH_2 \xrightarrow{NaNO_2/HCl} ..................$
- A$CO_2$
- B$N_2$
- C$NH_3$
- DNone of these
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