CBSE 2026 · Region 5 · Set 1 · Q14 · 1 mark
Assertion (A) : Highest oxidation state of Mn is +$\displaystyle 7$ in first series of transition elements.
Reason (R) : Transition metals exhibit variable oxidation states.
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)Understandassertion_reasoneasy
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CBSE Class 12 Chemistry past-paper question from the 2026board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.