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Chemistry Question on Aldehydes, Ketones and Carboxylic Acids

Aldehydes or ketones when treated with \ceC6H5−NH−NH2\ce{C_6H_5 - NH - NH_2}, the product formed is

A

semicarbazone

B

phenylhydrazone

C

hydrazone

D

oxime

Answer

phenylhydrazone

Explanation

Solution

Aldehydes or ketones when treated with phenyl hydrazine, C6H5−NH−NH2C _{6} H _{5}- NH - NH _{2}, the product is phenylhydrazone.
For example, acetaldehyde gives the following reaction.
C6H5−NH−NH2+CH3CHO→C6H5−NH−N=CH−CH3C _{6} H _{5}- NH - NH _{2}+ CH _{3} CHO \rightarrow C _{6} H _{5}- NH - N = CH - CH _{3}