Question

Assertion: Zn, Cd and Hg cannot be regarded as transition elements.

Reason: These elements do not belong to the d-block of the periodic table.

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

If Assertion is CORRECT but Reason is INCORRECT.

Explanation:

Zn, Cd, and Hg are not regarded as transition elements because their atoms and common ions have a completely filled d-subshell (d¹⁰).
However, the reason is incorrect because these elements do belong to the d‑block of the periodic table; they are excluded only because they do not have partially filled d‑orbitals.