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NEET UG CHEMISTRY MCQ: CO-ORDINATION COMPOUNDS

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Assertion (A): [Cr(H2O6)]Cl2\left[\mathrm{Cr}\left(\mathrm{H}_2 \mathrm{O}_6\right)\right] \mathrm{Cl}_2 and [Fe(H2O)6]Cl2\left[\mathrm{Fe}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right] \mathrm{Cl}_2 are reducing in nature.

Reason (R): Unpaired electrons are present in their dd-orbitals.
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Correct option: B
Assertion and Reason both are true but Reason is not the correct explanation of Assertion.
Option B is correct. Both the assertion and reason are true, but the reason is not the correct explanation for the assertion because the reducing nature is due to the ability to be oxidized to a more stable state, not merely the presence of unpaired electrons.

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The complexes [PtCl2(NH3)4]Br2  and  [PtBr2(NH3)4]Cl2  \left[ {\mathrm{PtC}{\mathrm{l}_2}{{\left( {\mathrm{N}{\mathrm{H}_3}} \right)}_4}} \right]\mathrm{B}{\mathrm{r}_2}\mathrm{\;and\;}\left[ {\mathrm{PtB}{\mathrm{r}_2}{{\left( {\mathrm{N}{\mathrm{H}_3}} \right)}_4}} \right]\mathrm{C}{\mathrm{l}_2}\mathrm{\;} are example for isomerism The total number of stereoisomers for the complex [Cr(Ox)2ClBr]3−\left[\mathrm{Cr}(\mathrm{Ox})_{2} \mathrm{ClBr}\right]^{3-} (where ox =\text{ox =} oxalate) is The value of xx on the [Ni(CN)4]x{\left[ {\mathrm{Ni}{{\left( {\mathrm{CN}} \right)}_4}} \right]^x} is: Excited state configuration of Mn2+\mathrm{M}{\mathrm{n}^{2 + }} is CuSO4\mathrm{CuS}{\mathrm{O}_4} decolourises on addition of KCN, the product is: The IUPAC name of K2[Ni(CN)4]{\mathrm{K}_2}\left[ {\mathrm{Ni}{{\left( {\mathrm{CN}} \right)}_4}} \right] is
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