Which of the following substances is the most volatile?

Which of the following compounds $(i)$ and $(ii)$ will not react with a mixture of $NaBr$ and $H_{2}SO_{4}$? Explain why?
$(i)$ $CH_{3}CH_{2}CH_{2}OH$
$(ii)$ Phenol (as shown in the image)

What will be the product of the reaction with $HBr$?

In the following reaction sequence,identify $Q$:
$p\text{-Chloronitrobenzene}$ $\xrightarrow[\Delta, P]{NaOH} P$ $\xrightarrow{C_6H_5CH_2Cl} Q$

Among the given pairs,in which pair is the second compound more acidic than the first?

Identify the product in the following reaction:
Phenol + $CHCl_3 + NaOH \rightarrow \text{Product}$