Identify the product $Q$ in the following reaction sequence,

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.

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