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3-hydroxybutanal is formed when $(X)$ reacts with $(Y)$ in dilute $(Z)$ solution. What are $X, Y$ and $Z$ ?
$\begin{array}{lll}X & Y & Y\end{array}$
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$\begin{array}{lll}X & Y & Y\end{array}$
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The correct answer is:
$\mathrm{CH}_3 \mathrm{CHO}, \quad \mathrm{CH}_3 \mathrm{CHO}, \quad \mathrm{NaOH}$
Aldehydes having $\alpha$-H-atoms undergoes aldol condensation in the presence of dil. $\mathrm{NaOH}$ and yield $\beta$-hydroxy aldehydes.
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