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Q. The reaction,
$R CN + SnCl _{2}+ HCl \longrightarrow R CH == NH \xrightarrow{ H _{3}\overset{+}{O}}R CHO$ is known as

Aldehydes Ketones and Carboxylic Acids

Solution:

The said reaction is known as Stephen reaction. In this reaction Nitrites are reduced to corresponding imine, which on hydrolysis given corresponding aldehyde.