Which of the following produces violet colour with $FeCl_3$ solution?

The major product in the following reaction is:

Which product is obtained when chlorobenzene is reacted with $6-8\%$ aqueous $NaOH$ at $633\,K$ temperature and $300\,bar$ pressure in the presence of an acid catalyst?

Match List-$I$ with List-$II$:

List-$I$ (Compound)	List-$II$ ($pK_a$ value)
$A$. Ethanol	$I$. $10.0$
$B$. Phenol	$II$. $15.9$
$C$. $m$-Nitrophenol	$III$. $7.1$
$D$. $p$-Nitrophenol	$IV$. $8.3$

Choose the correct answer from the options given below:

Which of the following is true regarding the solubility of $p$-nitrophenol and salicylaldehyde in a base?

Which of the following reactions is not an electrophilic substitution reaction?