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Q.
Carbylamine test is performed in alcoholic $KOH$ by heating a mixture of:
Haloalkanes and Haloarenes
Solution:
Carbylamine test is given by $1^{\circ}$ amine with $CHCl _3 + KOH$
$RNH_2 + CHCl_3 + KOH \rightarrow \underset{\text{Isocyanide}}{R\overset{\oplus}{N} \equiv \overset{\ominus}{C}}$
It gives an offensive smell of isocyanide
Mechanism proceeds via carbene
$\left(: CCl _2\right) $ or $\left(: CX _2\right) $ or $\left(: CXX ^1\right)$
$\left( XX ^1 \Rightarrow\right.$ Two different halogens)