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Q.

The method of zone refining of metals is based on the principle of

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a

Greater mobility of the pure metal than that of the impurity

b

Higher the melting point of the impurity than that of the pure metal

c

Greater the noble character of the solid metal than that of the impurity

d

Greater solubility of impurity in the molten metal than in the solid state of metal

answer is D.

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Detailed Solution

Impurity is more soluble in molten state than in solid state;Ultra pure B,Ga,In,Ge,Si are obtained;
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The method of zone refining of metals is based on the principle of