JEE Main · 2026 · 02 Apr 2026 · Shift 2 · Aldehydes Ketones and Carboxylic Acids

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A molecule ( X ) with following structure under mild acidic condition is hydrolysed to produce (Y) and (Z). Identify the correct statements about (Y) and (Z).

(X)

(A) Both (Y) and (Z) have same molar mass
(B) (Y) and (Z) can be distinguished from each other by

NaHCO_{3}

(C) (Y) and (Z) react with HCN with same rates
(D) (Y) and (Z) undergo addition reaction with 2, 4-DNP

Choose the correct answer from the options given below :

(A)A, B and C Only
(B)B and C Only
(C)C and D Only
(D)A and D Only✓ Correct

Answer: (D)

Solution

Mild acid hydrolysis of the ether cleaves each

C = C - O

linkage to its carbonyl tautomer: the prop-1-enyloxy part gives propanal and the isopropenyloxy part gives propan-2-one. Both products share the formula

C X_{3} H X_{6} O

and molar mass

58 g mo l^{- 1}

, so statement A is correct. Neither a ketone nor an aldehyde reacts with

NaHCO X_{3}

, so they cannot be told apart by it and statement B fails. The aldehyde adds HCN faster than the more hindered ketone, so statement C fails. Both carbonyl compounds condense with 2,4-dinitrophenylhydrazine, so statement D is correct. The correct statements are A and D.

JEE Main · 2026 · 02 Apr 2026 · Shift 2 · Single correct option

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JEE Main · 2026 · 02 Apr 2026 · Shift 2 · Aldehydes Ketones and Carboxylic Acids

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