Select incorrect statement regarding silver extraction process.

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When the lead-silver alloy is rich in silver, lead is removed by the cupellation process.

When the lead-silver alloy is rich in lead, silver is removed by parke's or pattinson's process.

Zinc forms an alloy with lead, from which lead is separated by distillation.

Zinc forms an alloy with silver, from which zinc is separated by distillation.

answer is C.

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Detailed Solution

Cupellation removes lead from lead-silver alloys that are high in silver. Lead, copper, tin, and other undesirable metals are among the contaminants that are oxidized, partially evaporated, and partially absorbed into the cupel's pores.

When the lead-silver alloy contains a high lead content, the lead is removed using the Parker or Patterson process, which entails desilverizing argentiferous lead through repeated melting and skimming operations that concentrate the silver in the molten bath and produce nearly pure lead in the final skimmings. Silver and zinc combine to produce an alloy, which is then distilled to remove the zinc.

Hence, option C is correct.

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