Treatment of propionaldehyde with dilute $NaOH$ solution gives:

An organic compound $A$ has the molecular formula $C_3H_6O$. It gives the iodoform test. When it is saturated with $HCl$,it gives a compound $B$ with the molecular formula $C_9H_{14}O$. What are $A$ and $B$ respectively?

The aldol condensation of $CH_{3}CHO$ results in the formation of

Consider the above reaction sequence and identify the product $B$.

Which of the following will be dehydrated most readily in alkaline medium?

The $K_{eq.}$ values in $HCN$ addition to the following aldehydes are in the order: