Which of the following reactions will form a tri-bromo derivative of phenol?

Halogenation of which one of the following will yield $m$-substituted product with respect to the methyl group as a major product?

The following reaction is known as:

The correct statement$(s)$ about the following reaction sequence is(are):
Cumene $(C_9H_{12})$ $\xrightarrow[ii) H_3O^+]{i) O_2}$ $P$ $\xrightarrow{CHCl_3/NaOH}$ $Q$ (major) + $R$ (minor)
$Q$ $\xrightarrow[PhCH_2Br]{NaOH}$ $S$
$(A)$ $R$ is steam volatile
$(B)$ $Q$ gives dark violet coloration with $1 \%$ aqueous $FeCl_3$ solution
$(C)$ $S$ gives yellow precipitate with $2, 4-dinitrophenylhydrazine$
$(D)$ $S$ gives dark violet coloration with $1 \%$ aqueous $FeCl_3$ solution

In which of the following reactions does carbon$-$carbon bond formation take place?

The compound obtained by heating salicylic acid with phenol in the presence of phosphorus oxychloride $(POCl_3)$ is