Question

what happens when aldehydes react with phenylhydrazine​

Answer 1

Answer:

Aldehydes and ketones react with phenylhydrazine to form the corresponding phenylhydrazones. Phenylhydrazones are insoluble in water and settle down as precipitates, and hence, the reaction can be used as a preliminary test for aldehydes and ketones.

Explanation:

hope it helps you mate have a good day ❤️ ✌️

Answer 2

Answer:

In phenylhydrazine, one of the hydrogens is replaced by a phenyl group, C6H5. This is based on a benzene ring.An aldehyde is a compound containing a functional group with the structure −CHO, consisting of a carbonyl center with the carbon atom also bonded to hydrogen and to an R group, which is any generic alkyl or side chain. The group—without R—is the aldehyde group, also known as the formyl group.