CBSE 2025 · Region 4 · Set 1 · Q2 · 1 mark
Out of $\displaystyle \mathrm{Fe}^{3+}, \mathrm{Sc}^{3+}, \mathrm{Cr}^{3+}$ and $\displaystyle \mathrm{Co}^{3+}$ ions, the one which is colourless in aqueous solution is :
Official answer
From CBSE’s own marking scheme for this paper.
(A)
$\displaystyle \mathrm{Sc}^{3+}$
The d-and f-Block ElementsElectronic Configurations of the d-Block ElementsUnderstandmcqmedium
More from The d-and f-Block Elements
- (i) Silver atom has completely filled d-orbitals in its ground state, it is still considered to be a…2022 · asked 3×
- (i) Describe giving reason which one of the following pairs has the property indicated: (I) Fe or Cu - higher…2026 · asked 3×
- The diamagnetic species is:2025 · asked 3×
- Assertion: Zr and Hf are of almost similar atomic radii. Reason (R): This is due to Lanthanoid contraction.2024 · asked 3×
- (i) When pyrolusite ore is fused with KOH, in presence of air, a dark green coloured product 'A' is obtained…2025 · asked 3×
- The element having [Ar] 3 d^10 4 s^1 electronic configuration is2025 · asked 3×
- From the given E^ values of the first row transition elements, answer the following questions: (i) Why is E…2022 · asked 3×
- Account for the following: (i) Transition metals and their compounds show catalytic activities. (ii) Zn, Cd…2022 · asked 3×
CBSE Class 12 Chemistry past-paper question from the 2025board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.