Which one is malachite from the following?

Considering Ellingham diagram, which of the following metals can be used to reduce alumina?

Extraction of gold and silver involves leaching with CN^$$-$$ ion. Silver is later recovered by

Match items of Column I with the items of Column II and assign the correct code :

Column $${\rm I}$$			Column $${\rm I}$$$${\rm I}$$
(A)	Cyanide process		(i)	Ultrapure Ge
(B)	Froth floatation process		(ii)	Dressing of ZnS
(C)	Electrolytic reduction		(iii)	Extraction of Al
(D)	Zone refining		(iv)	Extraction of Au
			(v)	Purification of Ni