The major product of the following reaction is:

The product of the following reaction is:
$Ph-CO-CH_3 \xrightarrow[{(ii)\,\Delta }]{{(i)\,aq.\,K_2CO_3}}$ Product

What is $X$ in the following reaction?
$2 CH_3COCH_3 \stackrel{Ba(OH)_2}{\longrightarrow} X$

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

Which of the following compounds would undergo aldol condensation?

Identify the organic compound which,on heating with a strong solution of $NaOH$,is partly converted into an acid salt and partly into an alcohol.