COMEDK202510 May 2025Morning ShiftChemistryAldehydes and KetonesActual
Two statements, one Assertion (A) and the other Reason (R) are given. Choose the correct option. Assertion: Compound [ X ] reacts with Hydrazine in presence of KOH / Glycol to form the product [ Y ] .
Options
- ABoth A and R are correct and R is the correct explanation of A .
- BBoth A and R are correct but R is not the correct explanation of A .
- CA is wrong but R is correct.
- DA is correct but R is wrong.
Correct answer
A. Both A and R are correct and R is the correct explanation of A .
Step-by-step solution
The reaction shown is the Wolff-Kishner reduction, which uses hydrazine ( NH₂NH₂ ) in the presence of a strong base like KOH and a high-boiling solvent like ethylene glycol to reduce a carbonyl group (aldehyde or ketone) to a methylene group ( -CH₂- ). In the given reaction, the aldehyde group ( -CHO ) in compound [X] is reduced to a methyl group ( -CH₃ ) to form compound [Y]. The Wolff-Kishner reduction is specifically designed to reduce carbonyl compounds to alkanes. It does not affect other functional groups lik