3-hydroxybutanal is formed when $(X)$ reacts with $(Y)$ in dilute $(Z)$ solution. What are $X, Y$ and $Z$ ?…

3-hydroxybutanal is formed when $(X)$ reacts with $(Y)$ in dilute $(Z)$ solution. What are $X, Y$ and $Z$ ? $\begin{array}{lll}X & Y & Y\end{array}$
  1. $\mathrm{CH}_3 \mathrm{CHO},\left(\mathrm{CH}_3ight)_2 \mathrm{CO}, \mathrm{NaOH}$
  2. $\mathrm{CH}_3 \mathrm{CHO}, \quad \mathrm{CH}_3 \mathrm{CHO}, \quad \mathrm{NaCl}$
  3. $\left(\mathrm{CH}_3ight)_2 \mathrm{CO},\left(\mathrm{CH}_3ight)_2 \mathrm{CO}, \mathrm{HCl}$
  4. $\mathrm{CH}_3 \mathrm{CHO}, \quad \mathrm{CH}_3 \mathrm{CHO}, \quad \mathrm{NaOH}$

Solution

Aldehydes having $\alpha$-H-atoms undergoes aldol condensation in the presence of dil. $\mathrm{NaOH}$ and yield $\beta$-hydroxy aldehydes.
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Asked in: JEE-TOPICTESTS-CHEMISTRY

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