Which of the following compounds does not react with sodium bisulphate?

In a set of reactions acetophenone gave a product $$B$$. Identify the product $$B$$.

$$\mathrm{C}_6 \mathrm{H}_5 \mathrm{COCH}_3 \xrightarrow{\mathrm{C}_6 \mathrm{H}_5 \mathrm{MgBr}} A \xrightarrow{\mathrm{H}^{+} / \mathrm{H}_2 \mathrm{O}} B$$

Arrange the following compounds in decreasing order of their boiling points.

$$\mathrm{CH}_3 \mathrm{CHO}, \mathrm{CH}_3 \mathrm{CH}_2 \mathrm{OH}, \mathrm{CH}_3 \mathrm{OCH}_3, \mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CH}_3$$

Identify B in the following series of reaction

$$\mathrm{CH}_3 \mathrm{CHO} \xrightarrow{\mathrm{CH}_3 \mathrm{MgX}} A \xrightarrow{\mathrm{HOH}} B$$

Among the following, the least reactive aldehyde is

Propanal on reaction with lithium aluminium hydride gives

$$\mathrm{C}_6 \mathrm{H}_5 \mathrm{COCl} \xrightarrow{\mathrm{NH}_3} X \xrightarrow{\mathrm{P}_2 \mathrm{O}_5} Y \xrightarrow[\mathrm{H}_2]{\mathrm{Ni}} Z$$

the end product in the above sequence of reactions is