How are carboxylic acids prepared from nitriles ?

Explanation

Alkyl Nitriles upon acid/base hydrolysis gets hydrolysed to amides which upon heating further get hydrolysed to carboxylic acids.
`underset("Alkane nitrile")(R-CN)+H_(2)O overset(H^(+))rarr underset("Amide")(RCONH_(2))+H_(2)O underset(Delta)rarr underset("Carboxylic acid")(RCOOH)+NH_(3)`