JEE Main Chemistry question

Which of the acids cannot be prepared by Grignard reagent?

(A)Acetic acid
(B)Formic acidCorrect
(C)Succinic acid
(D)All of these

Answer: (B)

Solution

Carboxylic acids are prepared from Grignard reagents by reaction with CO₂ followed by hydrolysis (RMgX + CO₂ → RCOOH), which always installs a new carbon-bearing –COOH group derived from CO₂

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Question ID VK-149258