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Chemistry · 2022 · 3 marks
CBSE 2022 · Region 5 · Set 3 · Q5
(a) Write the IUPAC name of the following complex: K_3[ Cr ( C_2 O_4)_3] (b) On the basis of crystal field theory, write the electronic configuration…
(a)
Write the IUPAC name of the following complex :$\displaystyle \mathrm{K}_{3}\left[\mathrm{Cr}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)_{3}\right]$
(b)
On the basis of crystal field theory, write the electronic configuration of $\displaystyle \mathrm{d}^{5}$ ion if $\displaystyle \Delta_{0}<\mathrm{P}$.
(c)
What are ambidentate ligands ?
Marking-scheme solution
(a) Potassium trioxalatochromate (III)
(b) \(\displaystyle t_{2 \mathrm{~g}}^{3} e_{\mathrm{g}}^{2}\)
(c) A ligand which contains two different donor atoms but only one of them forms a coordinate bond at a time with central metal atom or ion / Ligand which can ligate through two different atoms.
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CBSE Class 12 Chemistry past-paper question from the 2022 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.