Which from following reactions converts carbonyl group of aldehydes and ketones to methylene group on…

Which from following reactions converts carbonyl group of aldehydes and ketones to methylene group on treatment with zinc amalgam and concentrated $\mathrm{HCl}$ ?
  1. Wolf-Kishner reaction
  2. Stephen reduction
  3. Clemmensen reduction
  4. Rosenmund reduction

Solution

$\mathrm{R}-\mathrm{C}_{\mathrm{O}}-\mathrm{H} \xrightarrow{\mathrm{Zn}-\mathrm{Hg} / \mathrm{HCl}} \mathrm{R}-\mathrm{CH}_{3}$ (Clemmensen Reduction)

Asked in: MHT CET 2021 (21 Sep Shift 1)

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