Answer: formic acid.
- A acetic acid
- B oxalic acid
- C formic acid
- D benzoic acid
Correct answer: C. formic acid
Explanation: HCOOH (methanoic acid) is commonly called formic acid, first obtained from ants.
Curved arrows show the nucleophile attacking the carbonyl carbon while the C=O pi electrons move onto oxygen, giving a tetrahedral alkoxide intermediate.
Concept context
Aldehydes, ketones, carboxylic acids, and their derivatives (esters, amides, acid chlorides). Key reactions include nucleophilic addition, Aldol condensation, Cannizzaro, and Claisen. Very heavily tested in JEE and NEET.
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