JEE Main Chemistry question

Which of the following is a pair of functional isomers?

(A)CH₃COCH₃, CH₃CHO
(B)C₂H₅CO₂H, CH₃CO₂CH₃Correct
(C)C₂H₅CO₂H, HCO₂C₂H₅
(D)CH₃CO₂H, CH₃CHO

Answer: (B)

Solution

Propanoic acid (C₂H₅CO₂H) and methyl acetate (CH₃CO₂CH₃) share molecular formula C₃H₆O₂ but belong to different functional classes (acid vs. ester) — functional isomers. The

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Question ID VK-139224