Q. A compound does not react with 2, 4 dinitrophenyl hydrazine, compound is
A) Acetone
B) Acetaldehyde
C) $CH_{3}OH$
D) $CH_{3}CH_{2}COCH_{3}$
Explanation
(c)
Only aldehydes and ketones react with 2, 4-dinitrophenyl hydrazine to give orange coloured ppt. This reaction is used as test for carbonyl group. Alcohols does not give this reaction.
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Choice (a), (b) and (d) are carbonyl compounds and they react with 2,4-dnitreophenyl hydrazine $CH_{3}OH$[choice(c)] doesn’t have carbonyl group.
$\therefore CH_{3}OH$[choice (c)] doesn’t react with 2,4-dinitrophenyl hydrazine.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.