Match List - l with List - I and choose the correct option.

	List - I		List-II
(A)	Sodium carbonate	(I)	Deacon Process
(B)	Titanium	(II)	Castner-Kellner Process
(C)	Chlorine	(III)	Van-Arkel Process
(D)	Sodium hydroxide	(IV)	Solvay Process

Solvay process used for the formation of sodium carbonate. During this process, ammonium carbonate is treated with sodium chloride to form sodium carbonate and ammonium chloride.

${\left({\mathrm{NH}}_4\right)}_2{\mathrm{CO}}_3+2\mathrm{NaCl}\rightleftharpoons {\mathrm{Na}}_2{\mathrm{CO}}_3+2{\mathrm{NH}}_4\mathrm{Cl}$

Van Arkel method is used for purify metal from its crude state (impure metal). Impure metal (Ti) first heated at 500 K with iodine to form TiI₄, which is a volatile compound.

$\underset{\mathrm{Impure} \mathrm{metal}}{\mathrm{Ti}}+2{\mathrm{I}}_2\stackrel{500 \mathrm{K}}{\to }{\mathrm{TiI}}_4$

TiI₄ further heated at 1700 K to form pure metal.

${\mathrm{TiI}}_4\stackrel{1700\hspace{0.17em}\mathrm{K}}{\to }\mathrm{Ti}+2{\mathrm{I}}_2$

Deacon process is used for the formation of chlorine gas when oxygen gas is passed over HCl using catalyst copper chloride (Cu₂Cl₂).

$4\mathrm{HCl}+{\mathrm{O}}_2\underset{400°\mathrm{C}-450°\mathrm{C}}{\overset{{\mathrm{Cu}}_2{\mathrm{Cl}}_2}{\to }}2{\mathrm{Cl}}_2+2{\mathrm{H}}_2\mathrm{O}$

Sodium hydroxide (NaOH) is formed when brine solution of NaOH undergoes electrolysis in Castner Kellner process.