Home › CBSE Class 12 (Science) › Chemistry › Aldehydes, Ketones and Carboxylic Acids › Which reduction uses hydrazine, then KOH in ethy…
Which reduction uses hydrazine, then KOH in ethylene glycol on heating?
AClemmensen reduction
BRosenmund reduction
CStephen reduction
DWolff-Kishner reduction
Answer & Solution
Correct answer: D. Wolff-Kishner reduction
Hydrazine first forms the hydrazone, which loses nitrogen under strong base at high temperature to give the CH2 group.
Related questions
Hydrogen cyanide adds across the C=O bond of an aldehyde to give which compound?In both Clemmensen and Wolff-Kishner reductions, the carbonyl oxygen is replaced by what?Which solvent is used in the Wolff-Kishner reduction because of its high boiling point?Which reagent pair carries out the Clemmensen reduction of a carbonyl compound?What does Tollens' reagent oxidise an aldehyde to, while silver ion is reduced?Why are ketones not oxidised by mild oxidising agents?Besides aldehydes, which type of ketone also gives a positive Fehling test?In the Fehling test, what is the red precipitate formed with an aldehyde?