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Cupellation is a refining technique for metal 'X' to remove metal 'Y' present as impurity. 'X' and 'Y' are respectively

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Ag, Pb

Pb, Ag

Fe, Cu

Cu, Fe

answer is A.

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Detailed Solution

Cupellation is a refining process.it is used when ores or metals are present under high temperature. The noble metals are separated from impurities using a cupel which is a flat, porous dish.
It is also used for coin making and testing fresh metals.

-In large scale cupellation, is used to separate silver from lead.

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