The solubility of anhydrous $AlCl_3$ and hydrous $AlCl_3$ in diethyl ether are $S_1$ and $S_2$ respectively. Then:

Select the correct statement.

Read the following statements carefully :
$(A)$ $A$ secondary alcohol on oxidation gives a ketone
$(B)$ Ethanol reacts with conc. $H_2SO_4$ at $180\,^{\circ}C$ to yield ethylene
$(C)$ Methanol reacts with iodine and sodium hydroxide to give a yellow precipitate of iodoform
$(D)$ Hydrogen gas is liberated when sodium is added to alcohol. Select the correct statements from the above set:

Match the columns:

Column-$I$	Column-$II$
$A$. Methanol	$p$. Conversion of phenol to salicylic acid
$B$. Kolbe's reaction	$q$. Wood spirit
$C$. Williamson's reaction	$r$. Vapours are passed over heated copper at $573 \ K$
$D$. Conversion of $2^\circ$ alcohol to ketone	$s$. Reaction of alkyl halide with sodium alkoxide

Explain the following with an example.
$(i)$ Kolbe's reaction.
$(ii)$ Reimer-Tiemann reaction.
$(iii)$ Williamson ether synthesis.
$(iv)$ Unsymmetrical ether.

Which of the following reactions will produce a primary alcohol?