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Q.

The number of metals that can be purified by 'Zone refining' process from the following is
Germanium, Nickel, boron, zirconium, and indium

 

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answer is 3.

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Detailed Solution

Metals refined from zone refining: germanium, silicon, boron, gallium and indium.

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The number of metals that can be purified by 'Zone refining' process from the following isGermanium, Nickel, boron, zirconium, and indium