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Chemistry · 2026 · 1 mark
The d-and f-Block ElementsGeneral Properties of the Transition Elements (d-Block)1 markUnderstandassertion reason
CBSE 2026 · Region 5 · Set 1 · Q14
Assertion (A): Highest oxidation state of Mn is +7 in first series of transition elements. Reason (R): Transition metals exhibit variable oxidation…
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
(B)
Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
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CBSE Class 12 Chemistry past-paper question from the 2026 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.