under Clemmensen reduction conditions will give HOOC .
Statement II :
under Wolff-Kishner reduction condition will give
In the light of the above statements, choose the correct answer from the options given below :
(A)Statement I is false but Statement II is true
(B)Both Statement I and Statement II are false
(C)Statement I is true but Statement II is false✓ Correct
(D)Both Statement I and Statement II are true
Answer: (C)
Solution
Under Clemmensen conditions zinc amalgam with concentrated hydrochloric acid reduces the ketone carbonyl to a methylene group, and in the strongly acidic aqueous medium the amide end is hydrolysed to a carboxylic acid, so the keto-amide is carried through to pentanoic acid; the first statement is true. Wolff-Kishner conditions use hydrazine with base, and the chlorine on the carbon next to the carbonyl is lost by elimination in this strongly basic medium, so instead of a clean reduction to the methylene compound an alkene results; the second statement is false. Thus the first statement is true while the second is false.
JEE Main · 2023 · 24 Jan 2023 · Shift 2 · Single correct option
