CBSE 2026 · Region 3 · Set 3 · Q2 · 1 mark
The oxidation number of Pt in $\displaystyle \left[\mathrm{Pt}(\mathrm{en})_{2} \mathrm{Cl}_{2}\right]^{2+}$ is :
Official answer
From CBSE’s own marking scheme for this paper.
(B)
$\displaystyle + 4$
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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.