Question

Define cross aldol condensation

Answer 1

$\bold{Crossed \: Aldol \: Condensation}$

Crossed aldol condensation is a variation of aldol condensation.

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Answer 2

$\huge\textcolor{green}{\texttt{Answer :-}}$

The condensation of two different molecules of aldehydes or ketones is called cross aldol condensation.

It is a useful synthetic reaction only if one of the aldehydes does not contain $\alpha-$hydrogen atoms i.e., formaldehyde, benzaldehyde, etc.