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Assertion Metals of high impurity are obtained by zone-refining. Reason Impurities in the ore are more soluble in the metal than in the pure metal Choose the correct option.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Assertion is incorrect but Reason is correct

Correct answer: Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

Solution

Zone refining works because impurities are more soluble in the molten zone than in the solid metal, so they concentrate in the moving liquid and are carried to one end. This makes the purified portion of the metal highly pure, so the assertion is correct and the reason explains it.

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