Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
MHT CET Medical202621 April 2026Morning ShiftChemistryAldehydes and KetonesActual

Which of the following reactions converts > C=O to > CH ₂ ? (A) Rosenmund's reaction (B) Aldol condensation (C) Clemmensen's reduction (D) Wolf-Kishner reduction Choose the correct answer from the options given below:

Options

  1. A(A) and (D) only.
  2. B(C) and (D) only.
  3. C(A), (B), (C) and (D).
  4. D(B), (C) and (D) only.

Correct answer

B. (C) and (D) only.

Step-by-step solution

Rosenmund's reaction is used for the partial reduction of acid chlorides to aldehydes using H ₂ and Pd/BaSO ₄ . Aldol condensation involves the reaction of two molecules of aldehydes or ketones having at least one -hydrogen in the presence of a dilute base to form -hydroxy aldehydes or ketones, which upon heating give , -unsaturated carbonyl compounds. Clemmensen's reduction involves the reduction of aldehydes and ketones to their corresponding alkanes ( > C=O > CH ₂ ) using zinc amalgam ( Zn-Hg ) and concentrated

Practice Aldehydes and Ketones on Quantrex Academy →

More from Aldehydes and Ketones

Base catalyzed aldol condensation occurs with 2026Aromatic aldehydes are less reactive than the aliphatic aldehydes in nucleophilic addition reaction this is due to 2026Identify a final product obtained when Pent-3-enenitrile is treated with AlH (i -Bu )₂ followed by acid hydrolysis. 2026When a mixture of an aldehyde and Fehling solution is boiled in hot water, a red precipitate is formed. Here the obtained red precipitate is of - 2026Which of the following reagents gives the same reduction product with propionaldehyde and acetone ? 2026Which of the following statements regarding the haloform test is NOT correct? 2026Which is the best reagent for the following conversion? CH ₃ -CH=CH-CH ₂ -CHO CH ₃ -CH=CH-CH ₂ -CH ₂ -OH 2026Aldehydes containing at least one -hydrogen atom undergo a reaction in presence of dilute aq. NaOH to form -hydroxyl aldehyde. Identify the reaction. 2026 Full Aldehydes and Ketones list All MHT CET Medical PYQs