(C) Cupellation is a refining process used to separate noble metals like $Ag$ and $Au$ from base metals like $Pb$,$Cu$,and $Zn$. In this process,the i

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(C) Cupellation is a refining process used to separate noble metals like $Ag$ and $Au$ from base metals like $Pb$,$Cu$,and $Zn$. In this process,the impure metal is heated in a cupel (a shallow porous vessel) in a blast of air,where base metals oxidize and are removed,leaving behind pure silver.