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Chemistry · 2026 · 1 mark
The d-and f-Block ElementsElectronic Configurations of the d-Block Elements1 markAnalyseassertion reason
CBSE 2026 · Region 2 · Set 1 · Q14
Assertion (A): Zinc, cadmium and mercury are not considered as transition elements. Reason (R): These elements have completely filled orbitals in…
Assertion (A) : Zinc, cadmium and mercury are not considered as transition elements.
Reason (R) : These elements have completely filled orbitals in their ground state as well as in their common oxidation states.
Official answer
(A)
Both Assertion (A) and Reason (R) are true and Reason (R) is 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.