The reagent which does not react with both, acetone and benzaldehyde?
1. Sodium hydrogen sulphite
2. Phenyl hydrazine
3. Fehling's solution
4. Grignard reagent
Hint: Fehling's solution does not reacts with ketone
Acetone and benzaldehyde both do not react with Fehling's solution. Fehling's solution does not react with ketone and acetone is an ketone.
Aldehydes that lack alpha hydrogens, such as benzaldehyde or pivalaldehyde (2,2-dimethylpropanal) cannot form an enolate ion and thus do not give a positive Fehling’s test result under usual conditions.
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