Answer: Ketone.
- A Aldehyde
- B Ketone
- C Carboxylic acid
- D Ether
Correct answer: B. Ketone
Explanation: Secondary alcohols are oxidised to ketones.
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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