question_answer

The reagent with which both acetaldehyde and acetophenone react easily are:

A)  Fehlings solution            

B)  Schiffs reagent

C)  Tollens reagent

D)         sodium bisulphite

E)  2, 4-dinitrophenylhydrazine

Correct Answer: E

Solution :

Aldehydes and ketones both can react with 2, 4-dinitrophenyl hydrazine as \[\underset{aldehyde\text{ }phenyl\text{ }hydrazone}{\mathop{RCH=N.NH{{C}_{6}}{{H}_{5}}}}\,+{{H}_{2}}O\] \[\underset{ketone\text{ }phenyl\text{ }hydrazone}{\mathop{{{R}_{2}}C=N.NH{{C}_{6}}{{H}_{5}}}}\,+{{H}_{2}}O\]