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Q.
$CH_{3}COCH_{3} \, $ and $CH_{3}CH_{2}CHO$ can be distinguished by
NTA AbhyasNTA Abhyas 2022
Solution:
By neutral $\text{FeCl}_{\text{3}}$ only allylic and phenol can be distinguished.
By $\text{NaHSO}_{3}$ and 2,4-DNP: ketone and aldehyde both can give test.
Ketone and aldehyde can be distinguished by Tollen's reagent, Fehling's solution and Schiff's reagent.
$CH_{3}COCH_{3}$ (ketone) and $CH_{3}CH_{2}CHO \, $ (aldehyde) can be distinguished by Tollen's reagent. $CH_{3}CH_{2}CHO$ reacts with Tollen's reagent to give silver mirror while $CH _3 CH _2 CHO + Ag _2 O \stackrel{\Delta}{\rightarrow} CH _3 CH _2 COOH +2 Ag$
Silver mirror
$CH _3 COCH _3+ Ag _2 O \stackrel{\Delta}{\rightarrow}$ No reaction