(A) Cupellation is a process used for the refining of noble metals like $Ag$ and $Au$. In this process,the impure metal is heated in a cupel (a shallo

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(A) Cupellation is a process used for the refining of noble metals like $Ag$ and $Au$. In this process,the impure metal is heated in a cupel (a shallow porous dish) in a blast of air. The impurities,which have a greater affinity for oxygen than the metal,get oxidised and are removed as slag or volatile oxides,while the noble metal remains unaffected due to its inert nature.

Class 12 Chemistry General Principles and Processes of Isolation of Elements Refining of crude Metal

Easy

When an impurity in a metal has greater affinity for oxygen and is more easily oxidised than the metal itself,the metal is refined by:

A
cupellation
B
zone-refining
C
distillation
D
electrolytic process

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General Principles and Processes of Isolation of Elements

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Refining of crude Metal

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When an impurity in a metal has greater affinity for oxygen and is more easily oxidised than the metal itself,the metal is refined by:

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