Home › NEET UG › Chemistry › Aldehydes, Ketones and Carboxylic Acids › **Clemmensen reduction** converts C=O of a keton…
**Clemmensen reduction** converts C=O of a ketone to CH₂ using:
AZn-Hg amalgam in concentrated HCl
BLiAlH₄ in ether
CH₂/Pt (catalytic hydrogenation)
DNaBH₄ in methanol
Answer & Solution
Correct answer: A. Zn-Hg amalgam in concentrated HCl
**Clemmensen reduction**: C=O → CH₂ using **Zn-Hg / conc. HCl** (acidic conditions). Useful when there are NO acid-sensitive groups in the substrate. **Wolff-Kishner reduction** (NH₂NH₂ / KOH / ethylene glycol, hot) does the same conversion under **basic** conditions — for acid-sensitive substrates.
Related questions
Among acetic acid, chloroacetic acid, dichloroacetic acid, trichloroacetic acid, the stronCarboxylic acids are more acidic than alcohols because:Tollens' reagent gives a silver mirror with:Aldehydes are generally more reactive than ketones in nucleophilic addition because:Glycine has 2 amino acid forms in solution. Zwitterion:In Friedel-Crafts acylation, RCOCl + AlCl₃ + benzene gives:Esterification: RCOOH + R'OH + acid catalyst yields:Clemmensen reduction converts C=O to CH₂ using: