$(CH_3)_3CCHO$ does not undergo aldol condensation due to

Complete reaction of acetaldehyde with excess formaldehyde,upon heating with conc. $NaOH$ solution,gives $P$ and $Q$. Compound $P$ does not give Tollens' test,whereas $Q$ on acidification gives positive Tollens' test. Treatment of $P$ with excess cyclohexanone in the presence of catalytic amount of $p$-toluenesulfonic acid $(PTSA)$ gives product $R$. Sum of the number of methylene groups $(-CH_2-)$ and oxygen atoms in $R$ is....

In the given reaction $X + Y \xrightarrow[5^\circ C]{NaOH} CH_3-CH(OH)-CH(CH_3)-CHO$,$(X)$ and $(Y)$ will respectively be:

$CH_3-CO-CH_3$ $\xrightarrow{NaCN/HCl} A$ $\xrightarrow{H_3O^{+}/\Delta} B$. In the above sequence of reactions,$A$ and $B$ are:

Which one of the following compounds does not give a primary alcohol on reduction?

Which of the following compounds would undergo Cannizzaro's reaction?