1.

In mechanism of aldol condensation reaction the second step is

Answer»

abstraction of `alpha `- H ATOM carbon of aldehyde by base to form carbanion
The attack of carbanionon CARBONYL carbon atom of another moleculeto form alkoxide ion
The attck of carbonion on carbonyl carbon atom of another molecule to form OXOCATION
Alkkoxide ion take proton from water to form `beta` - hydroxy aldehyde

ANSWER :B


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