1.

RCOOH after treatment with PCl_(5) and KCN is subjected to hydrolysis followed by Clemmension's reduction, product obtained as :

Answer»

`RCH_(2)-COCL`
`RCH_(2)-COOH`
`RCOCN`
`RCN`

Solution :`RCOOH+PCl_(5)toRCOCl+POCl_(3)+HCL overset(KCN)toRCOCN+KCl overset(2H_(2)O)toRCOCOOH+2NH_(3) underset(Zn-Hg//conc.HCl)overset("Clemmen's reduction")toRCH_(2)COOH+H_(2)O`


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