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B
Butanaldehyde
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C
Acetone
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D
None of these
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Solution
The correct option is B Acetone
This is Wolff-Kishner reduction process, where reduction of an aldehyde or ketone carbonyl group (C=O) into a methylene group (CH2) takes place.
The aldehyde or ketone is condensed with hydrazine to form a hydrazone. This hydrazone is then reduced by reaction with a strong base like sodium ethoxide to form a carbanion intermediate, which is subsequently protonated.
Among all options, acetone has three carbon (as in product) and having −C=O group, hence undergoes given reaction and gives propane.