Question

Which of the acids cannot be prepared by Grignard reagent ?
A. acetic acid
B. succine acid
C. Formic acid
D. All of these

Answer 1

Correct Answer - C
Carboxylic acids are prepared by reaction of Grignard reagent with `CO_(2)`
`:.` Formic acid (HCOOH) has only one carbon atom.
`:.` Formic acid cannot be prepared from Grignard reagent
`underset("Grignard reagent")(RMgX)+CO_(2) to R- overset(O) overset(|)C-OMg overset(HOH) to underset("Acid")(RCOOH)`