CBSE 2022 · Region 4 · Set 3 · Q5 · 3 marks
(i)Write the electronic configuration of $\displaystyle \mathrm{d}^{4}$ on the basis of crystal field splitting theory if $\displaystyle \Delta_{0}>\mathrm{P}$.(ii)$\displaystyle \left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}$ is an inner orbital complex whereas $\displaystyle \left[\mathrm{Ni}\left(\mathrm{NH}_{3}\right)_{6}\right]^{2+}$ is an outer orbital complex. (Atomic number : $\displaystyle \mathrm{Co}=27, \mathrm{Ni}=28$ )(iii)Write the number of ions produced from the complex $\displaystyle \left[\mathrm{Pt}\left(\mathrm{NH}_{3}\right)_{6}\right] \mathrm{Cl}_{4}$ in solution.(i)Calculate the spin only magnetic moment of the complex $\displaystyle \left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}$. (Atomic number of $\displaystyle \mathrm{Fe}=26$ )(ii)Which out of the following two complexes is more stable and why ? \[\left[\mathrm{CoF}_{6}\right]^{3-}, \quad\left[\mathrm{Co}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)_{3}\right]^{3-} \](iii)Write the IUPAC name of the given complex :$\displaystyle \left[\mathrm{Pt}\left(\mathrm{NH}_{3}\right)_{2} \mathrm{Cl}_{2}\right]$
(i)
Write the electronic configuration of $\displaystyle \mathrm{d}^{4}$ on the basis of crystal field splitting theory if $\displaystyle \Delta_{0}>\mathrm{P}$.
(ii)
$\displaystyle \left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}$ is an inner orbital complex whereas $\displaystyle \left[\mathrm{Ni}\left(\mathrm{NH}_{3}\right)_{6}\right]^{2+}$ is an outer orbital complex. (Atomic number : $\displaystyle \mathrm{Co}=27, \mathrm{Ni}=28$ )
(iii)
Write the number of ions produced from the complex $\displaystyle \left[\mathrm{Pt}\left(\mathrm{NH}_{3}\right)_{6}\right] \mathrm{Cl}_{4}$ in solution.
(i)
Calculate the spin only magnetic moment of the complex $\displaystyle \left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}$. (Atomic number of $\displaystyle \mathrm{Fe}=26$ )
(ii)
Which out of the following two complexes is more stable and why ? \[\left[\mathrm{CoF}_{6}\right]^{3-}, \quad\left[\mathrm{Co}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)_{3}\right]^{3-} \]
(iii)
Write the IUPAC name of the given complex :$\displaystyle \left[\mathrm{Pt}\left(\mathrm{NH}_{3}\right)_{2} \mathrm{Cl}_{2}\right]$
Marking-scheme solution
(i)
$\displaystyle t_{2\mathrm{g}}^{4} e_{\mathrm{g}}^{0}$
(ii)
In $\displaystyle \left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}$, inner $\displaystyle 3d$ orbitals are used in hybridisation whereas in $\displaystyle \left[\mathrm{Ni}\left(\mathrm{NH}_{3}\right)_{6}\right]^{2+}$ outer 4d orbitals are used in hybridisation.
(iii)
$\displaystyle 5$
(i)
$\displaystyle n=4$
\[\begin{aligned}
\mu &=\sqrt{n(n+2)}=\sqrt{4(4+2)}=\sqrt{24} \\
&=4.9 \mathrm{~BM}
\end{aligned}
\]
(ii)
$\displaystyle \left[\mathrm{Co}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)_{3}\right]^{3-}$, due to chelate effect / cyclic structure.
(iii)
diamminedichloridoplatinum (II)
Coordination CompoundsBonding in Coordination CompoundsApplyshort_answerhard
More from Coordination Compounds
- The Valence Bond Theory (VBT) explains the formation, magnetic behaviour and geometrical shapes of…2024 · asked 3×
- Which of the following ligands forms a chelate complex?2026 · asked 3×
- When a coordination compound CoCl 3 · 6 NH 3 is mixed with excess of AgNO 3 solution, 3 moles of AgCl are…2026 · asked 3×
- Write the IUPAC name of the complex [Pt(en) 2 Cl 2]^2+. Draw the structure of geometrical isomer of this…2025 · asked 3×
- The nature of bonding, structure of the coordination compound can be explained to some extent by valence bond…2024 · asked 3×
- Draw the geometrical isomers of [Co(en) 2 Cl 2]^2+. Which geometrical isomer of [Co(en) 2 Cl 2]^2+ is not…2023 · asked 3×
- In coordination compounds, metals show two types of linkages, primary and secondary. Primary valencies are…2023 · asked 3×
- Answer any three of the following questions: Explain the type of hybridization in [Fe(CN) 6]^3- on the basis…2023 · asked 3×
CBSE Class 12 Chemistry past-paper question from the 2022board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.