CBSE 2023 · Region 4 · Set 1 · Q17 · 1 mark
Assertion (A) : Zr and Hf have almost identical radii. Reason $\displaystyle (R)$ : Both Zr and Hf exhibit similar properties.
Official answer
From CBSE’s own marking scheme for this paper.
(B)
Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
The d-and f-Block ElementsGeneral Properties of the Transition Elements (d-Block)Analyseassertion_reasonmedium
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CBSE Class 12 Chemistry past-paper question from the 2023board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.