First slide

General methods of extraction of elements from the earth crust

Question

Silver containing lead as an impurity is not purified by

Moderate

A

Poling
B

Cupellation
C

Levigation
D

Distillation

Solution

Cupellation is a refining process in metallurgy where ores or alloyed metals are treated under very high temperatures and have controlled operations to separate noble metals, like silver, from base metals, like lead, copper, zinc, arsenic, antimony, or bismuth, present in the ore.

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