What are the products formed when a mixture of benzaldehyde and formaldehyde is heated with an aqueous solution of $NaOH$?

Identify compound $B$ in the following reaction sequence:
Cyclopentanone $+ H_2NOH$ $\xrightarrow{pH = 4.5, \Delta} (A)$ $\xrightarrow{H^+ / \Delta} (B)$

Given below are the four isomeric compounds $(P, Q, R, S)$. Identify the correct statements from below.
$A$. $Q, R$ and $S$ will give a precipitate with $2,4-DNP$.
$B$. $P$ and $Q$ will give a positive Bayer's test.
$C$. $Q$ and $R$ will give a sooty flame.
$D$. $R$ and $S$ will give a yellow precipitate with $I_2/NaOH$.
$E$. $Q$ alone will deposit silver with Tollen's reagent.
Choose the correct option.

Identify the product $Y$ in the following reaction sequence:
$CH_3CHO + CH_3MgI$ $\xrightarrow{\quad} X$ $\xrightarrow{H_2O/H^+} Y$

Amongst the following compounds, the one that will not respond to Cannizzaro reaction upon treatment with alkali is

Which of the following compounds will give a positive test with Tollen's reagent?