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Chemistry · 2024 · 3 marks
CBSE 2024 · Region 4 · Set 1 · Q22
(a) Draw the geometrical isomers of the given complex: [ Pt ( en )_2 Cl_2]^2+ (b) Write the electronic configuration for d^4 ion if Δ_0< P on the…
(a)
Draw the geometrical isomers of the given complex : \[\left[\mathrm{Pt}(\mathrm{en})_{2} \mathrm{Cl}_{2}\right]^{2+} \]
(b)
Write the electronic configuration for $\displaystyle \mathrm{d}^{4}$ ion if $\displaystyle \Delta_{0}<\mathrm{P}$ on the basis of crystal field theory.
(c)
What is meant by a unidentate ligand ? Give an example. $\displaystyle \mathbf{1} \boldsymbol{\times} \mathbf{3}$
Marking-scheme solution
(a)
Cis isomer
(b)
\(\displaystyle \mathrm{t}_{2 \mathrm{~g}}^{3} \mathrm{e}_{\mathrm{g}}^{1}\)
(c)
When a ligand is bound to a metal atom or ion through a single donor atom.
Example: \(\displaystyle \mathrm{Cl}^{-} / \mathrm{H}_{2} \mathrm{O} / \mathrm{NH}_{3}\)
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CBSE Class 12 Chemistry past-paper question from the 2024 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.