Q. Assertion (A) is preferred as a reagent in the oxidation of nitroalkanes to alkanamines.
Reason (R) Iron scrap and is preferred in the reduction reaction of nitrobenzene.

 1434  160 Amines Report Error

Solution:

Reduction of nitro compounds with Fe scrap and is preferred because formed gets hydrolysed to release during the reaction. Thus, only a small amount of is required to initiate the reaction.