MCQ
Catalyst $SnC{l_2}/HCl$ is used in
  • Stephen's reduction
  • B
    Cannizzaro reaction
  • C
    Clemmensen's reduction
  • D
    Rosenmund's reduction

Answer

Correct option: A.
Stephen's reduction
a
In the Stephen's reduction alkyl cyanide is reduced to aldehyde by $SnCl _2 / HCl$.

$R - C \equiv N +2 H \stackrel{ SnCl _2 / HCl }{\longrightarrow} \underset{\text { alidine }}{ RCH }=\underset{\text { hydrochloride }}{ NH \cdot HCl } \stackrel{ H _2 O }{\longrightarrow} \underset{\text { aldehyde }}{ RCHO }+ NH _4 Cl$

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