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Silver containing lead as impurity is removed by.

$ (a)\;\text{Poling} \\(b)\;\text{cupellation .} \\(c)\;\text{lavigation} \\ (d)\;\text{distillation} $
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This is the process by which we can separate the noble meatls such as,gold or silver from base metals
Hence b is the correct answer.
answered Mar 20, 2014 by meena.p

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