Ag can be obtained from purified Zn-Ag alloy by :

distillation

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poling

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liquation

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reduction

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Solution

The correct option is A distillation
Lead contains impurities such as Cu, Ag, Bi, Sb and Sn.
Silver is removed by Parke's process where molten zinc is added to molten impure lead. The former is immiscible with the latter. Silver is more soluble in molten zinc than in molten lead. Zinc-silver alloy solidifies earlier then molten lead and thus can be separated.
Ag can be thus obtained from Zn-Ag alloy by distillation process.

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