LiAlH4 is a more reactive reducing agent than NaBH4
and it will also reduce -COOH and -COOR, and -CHO
to corresponding primary alcohols .LiAlH4 also reduce
-NO2 to -NH2 and many alkyl halides are reduced to
alkanes .
Since, p−O2N−C6H4CHO is reduced to p−H2N−C6H4CH2OH