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Assertion: The Zn2+ ion is diamagnetic. Reason: Zn2+ is formed by removing two electrons from the 4s orbital of zinc. Choose the correct option.

1. Both assertion and reason are correct, and the reason correctly explains the assertion
2. Both assertion and reason are correct, but the reason does not correctly explain the assertion
3. The assertion is correct but the reason is incorrect
4. The assertion is incorrect but the reason is correct

Correct answer: Both assertion and reason are correct, and the reason correctly explains the assertion

Solution

Zn (3d10 4s2) loses its two 4s electrons to give Zn2+ (3d10), which has all electrons paired and is therefore diamagnetic; the reason correctly explains the assertion.

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