Question

Assertion: Zn²⁺ ion is diamagnetic.

Reason: The electrons are lost from 4s-orbital to form Zn²⁺ ion.

Options

• If both Assertion and Reason are CORRECT and Reason is the CORRECT explanation of the Assertion.

• If both Assertion and Reason are CORRECT but Reason is not the CORRECT explanation of the Assertion.

• If Assertion is CORRECT but Reason is INCORRECT.

• If Assertion is INCORRECT but Reason is CORRECT.

Answer 1

Both Assertion and Reason are CORRECT, but Reason is NOT the correct explanation of the Assertion.

Explanation:

The Zn²⁺ ion is diamagnetic because after losing two electrons, it has a completely filled 3d¹⁰ subshell, with all electrons paired. Although it is correct that electrons are lost from the 4s orbital, this fact alone does not explain diamagnetism; diamagnetism is due to the absence of unpaired electrons.