Chemistry General Principles and Processes of Isolation of Elements ( Not In Syllabus ) Refining of Crude Metal Single Correct MCQ
Published on: August 12, 2026

Zone refining is a method to obtain

A
Very high temperature
B
Ultra pure Al
C
Ultra pure metals
D
Ultra pure oxides

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Verified by Experts
The correct answer is:
C

Zone refining is employed for preparing extremely pure metals.

It is based on the principle that when a molten solution of the impure metal is allowed to cool the pure metal crystallises out while the impurities remain in the melt. Ex : Semiconductors like Si, Ge and Ga are purified by this method.

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