Match the metals listed in column-I with processes involved in their extraction listed in column-II.

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Solution

Here are the reactions:
(A) $2 P b S + 3 O_{2} \to 2 P b O + 2 S O_{2}$ .
$2 P b O + P b S \to 3 P b + S O_{2}$ .
$P b O + C \to P b + C O$ .
(B) $A g + 2 C N^{-}_{2} H_{2} O [A g (C N) 2]^{-}$ .
$2 [A g (C N)_{2}]^{-} + Z n \to [Z n (C N)_{4}]^{2 -} + 2 A g ↓$ .
(C) $2 Z n S + 3 O_{2} \to 2 Z n O + 2 S O_{2}$ .
$Z n O + C \to Z n + C O$ .
( D) Leaching 0f bauxite followed of by electrolytic reduction of molten $A l_{2} O_{3}$ (anhydrous) + cryolite.

Suggest Corrections

Column I	Column II
A. Self reduction	P. Lead
B. Carbon reduction	Q. Silver
C. Complex formation and displacement by metal	R. Copper
D. Electrolytic reduction	S. Sodium