MCQ
Carbylamine test is done by heating alcoholic $KOH$ with
- AChloroform and silver powder
- ✓Trihalogen methane and primary amine
- CAlkyl halide and primary amine
- DAlkyl cyanide and primary amine
$CHC{l_3} + C{H_3}N{H_2} + \mathop {3KOH}\limits_{{\rm{alc}}{\rm{.}}} \to \mathop {C{H_3}N\vec = }\limits_{\scriptstyle{\rm{Methyl }}\atop\scriptstyle{\rm{isocyanide}}} \mathop {C + 3KCl + 3{H_2}O}\limits_{} $
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$(A)$ Upon heating, $H _3 PO _3$ undergoes disproportionation reaction to produce $H _3 PO _4$ and $PH _3$.
$(B)$ While $H _3 PO _3$ can act as reducing agent, $H _3 PO _4$ cannot.
$(C)$ $H _3 PO _3$ is a monobasic acid.
$(D)$ The $H$ atom of $P - H$ bond in $H _3 PO _3$ is not ionizable in water.