Consider two chemical reactions (A) and (B) that take place during metallurgical process:

(A) $$ZnC{O_{3(s)}}\buildrel \Delta \over \longrightarrow Zn{O_{(s)}} + C{O_{2(g)}}$$

(B) $$2Zn{S_{(s)}} + 3{O_{2(g)}}\buildrel \Delta \over \longrightarrow 2Zn{O_{(s)}} + 2S{O_{2(g)}}$$

The correct option of names given to them respectively is :

The metal that can be purified economically by fractional distillation method is :

Match List - I with List - II :

	List - I		List - II
(a)	Mercury	(i)	Vapour phase refining
(b)	Copper	(ii)	Distillation refining
(c)	Silicon	(iii)	Electrolytic refining
(d)	Nickel	(iv)	Zone refining

Choose the most appropriate answer from the option given below :

The chemical that is added to reduce the melting point of the reaction mixture during the extraction of aluminium is :