Which of the following methods is used for obtaining metals of very high purity?

Distillation

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Zone refining

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Liquation

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Electrolytic refining

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Solution

The correct option is B Zone refining
Zone melting or zone refining is a method of purifying crystals in which a narrow region of crystal is molten and this molten zone is moved along the crystal. The molten region melts impure solid at its front edge and leaves a wake of pure metal solidified behind it. This method is used to prepare high purity materials mainly semiconductors for transistors.

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