JEE Main Chemistry question

The general formula CₙH₂ₙO₂ could be for an open-chain

(A)Diketones
(B)Carboxylic acidsCorrect
(C)Diols
(D)Dialdehydes

Answer: (B)

Solution

A saturated open-chain monocarboxylic acid R–COOH has formula CₙH₂ₙO₂ (e.g., CH₃COOH = C₂H₄O₂, fits n=2: 2n=4 ✓). Diketones and dialdehydes (two C=O groups, each

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Question ID VK-138956