CBSE 2024 · Region 2 · Set 1 · Q31 · 5 marks
Answer any five of the following :(a)How is the crystal field splitting energy for octahedral complex $\displaystyle \left(\Delta_{0}\right)$ related to that of tetrahedral complex $\displaystyle \left(\Delta_{\mathrm{t}}\right)$ ?(b)Write the IUPAC name of the following complex : $\displaystyle \left[\mathrm{PtCl}_{2}(\mathrm{en})_{2}\right]\left(\mathrm{NO}_{3}\right)_{2}$(c)Write the geometry and magnetic behaviour of the complex $\displaystyle \left[\mathrm{Ni}(\mathrm{CO})_{4}\right]$ on the basis of Valency Bond Theory (VBT).(d)What type of isomerism is shown by the complex $\displaystyle \left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]\left[\mathrm{Cr}(\mathrm{CN})_{6}\right]$ ?(e)For the coordination compound on the basis of crystal field theory, write the electronic configuration for $\displaystyle \mathrm{d}^{4}$ ion if $\displaystyle \Delta_{0}<\mathrm{P}$. Is the coordination compound a high spin or low spin complex ?(f)Out of $\displaystyle \left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}$ and $\displaystyle \left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{4} \mathrm{Cl}_{2}\right]^{+}$, which complex is heteroleptic and why ?(g)Draw the structures of optical isomers of $\displaystyle \left[\mathrm{PtCl}_{2}(\mathrm{en})_{2}\right]^{2+}$.
Answer any five of the following :
(a)
How is the crystal field splitting energy for octahedral complex $\displaystyle \left(\Delta_{0}\right)$ related to that of tetrahedral complex $\displaystyle \left(\Delta_{\mathrm{t}}\right)$ ?
(b)
Write the IUPAC name of the following complex : $\displaystyle \left[\mathrm{PtCl}_{2}(\mathrm{en})_{2}\right]\left(\mathrm{NO}_{3}\right)_{2}$
(c)
Write the geometry and magnetic behaviour of the complex $\displaystyle \left[\mathrm{Ni}(\mathrm{CO})_{4}\right]$ on the basis of Valency Bond Theory (VBT).
(d)
What type of isomerism is shown by the complex $\displaystyle \left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]\left[\mathrm{Cr}(\mathrm{CN})_{6}\right]$ ?
(e)
For the coordination compound on the basis of crystal field theory, write the electronic configuration for $\displaystyle \mathrm{d}^{4}$ ion if $\displaystyle \Delta_{0}<\mathrm{P}$. Is the coordination compound a high spin or low spin complex ?
(f)
Out of $\displaystyle \left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}$ and $\displaystyle \left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{4} \mathrm{Cl}_{2}\right]^{+}$, which complex is heteroleptic and why ?
(g)
Draw the structures of optical isomers of $\displaystyle \left[\mathrm{PtCl}_{2}(\mathrm{en})_{2}\right]^{2+}$.
Marking-scheme solution
(a)
\(\displaystyle \Delta_{\mathrm{t}}=\left(\frac{4}{9}\right) \Delta_{\circ}\)
(b)
Dichloridobis(ethane -$\displaystyle 1$, $\displaystyle 2$- diamine)platinum (IV) nitrate
(c)
\(\displaystyle \mathrm{sp}^{3}\), diamagnetic
(d)
Coordination isomerism
(e)
\(\displaystyle \mathrm{t}_{2 g}^{3} e_{g}^{1}\), high spin
(f)
\(\displaystyle \left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{4} \mathrm{Cl}_{2}\right]^{+}\), as the metal is bound to more than one donor group(ligand).
Coordination CompoundsBonding in Coordination CompoundsUnderstandlong_answermedium
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 2024board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.