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NTA Abhyas JEE Main2020ChemistryAldehydes and KetonesPractice

An organic compound X is oxidized by using acidified K 2 C r 2 O 7 . The product obtained reacts with phenyl hydrazine, but does not answer silver mtextrror test. The possible structure of X is

Options

  1. AC H 3 C O C H 3
  2. BC H 3 2 C H O H
  3. CC H 3 C H O
  4. DC H 3 C H 2 O H

Correct answer

B. C H 3 2 C H O H

Step-by-step solution

The oxidation product of X reacts with phenyl hydrazine, thus it contains > C = 0 group. The same product does not give silver mirror test. Thus, it is a ketone, because only aldehydes give silver mirror test. Thus, the compound X must be 2 o alcohol, as only secondary alcohols give ketones on oxidation and hence, X is C H 3 2 C H O H .

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