CBSE 2023 · Region 4 · Set 1 · Q28 · 3 marks
Answer any three of the following questions :(a)Explain the type of hybridization in $\displaystyle \left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{3-}$ on the basis of valence bond theory. (Given : Atomic number of $\displaystyle \mathrm{Fe}=26$ )(b)Draw the geometrical isomers of $\displaystyle \left[\mathrm{PtCl}_{2}(\mathrm{en})_{2}\right]^{2+}$ ion.(c)$\displaystyle \left[\mathrm{NiCl}_{4}\right]^{2-}$ is paramagnetic while $\displaystyle \left[\mathrm{Ni}(\mathrm{CO})_{4}\right]$ is diamagnetic though both are tetrahedral. Why ?(d)Name the type of isomerism when ambidentate ligands are attached to central metal ion. Give one example of ambidentate ligand.
Answer any three of the following questions :
(a)
Explain the type of hybridization in $\displaystyle \left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{3-}$ on the basis of valence bond theory. (Given : Atomic number of $\displaystyle \mathrm{Fe}=26$ )
(b)
Draw the geometrical isomers of $\displaystyle \left[\mathrm{PtCl}_{2}(\mathrm{en})_{2}\right]^{2+}$ ion.
(c)
$\displaystyle \left[\mathrm{NiCl}_{4}\right]^{2-}$ is paramagnetic while $\displaystyle \left[\mathrm{Ni}(\mathrm{CO})_{4}\right]$ is diamagnetic though both are tetrahedral. Why ?
(d)
Name the type of isomerism when ambidentate ligands are attached to central metal ion. Give one example of ambidentate ligand.
Marking-scheme solution
(a) \(\displaystyle \mathrm{Fe}=3 \mathrm{~d}^{6} 4 \mathrm{~s}^{2}\)
\(\displaystyle 6 \mathrm{CN}^{-}\) Hence hybridization is \(\displaystyle \mathrm{d}^{2} \mathrm{sp}^{3}\)
\(\displaystyle 6 \mathrm{CN}^{-}\) Hence hybridization is \(\displaystyle \mathrm{d}^{2} \mathrm{sp}^{3}\)(b) 
cis
cis(c) \(\displaystyle \mathrm{Cl}^{-}\)being a weak field ligand does not cause pairing of electrons and hence \(\displaystyle \left[\mathrm{NiCl}_{4}\right]^{2-}\) is paramagnetic while CO being a strong field ligand causes pairing of electrons therefore \(\displaystyle \left[\mathrm{Ni}(\mathrm{CO})_{4}\right]\) is diamagnetic.
(d) Linkage isomerism. Example, \(\displaystyle \mathrm{CN}^{-} / \mathrm{NO}_{2}^{-} / \mathrm{SCN}^{-}\)
Coordination CompoundsBonding in Coordination CompoundsUnderstandshort_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×
- Which of the following species cannot act as a ligand? Give reason. OH^-, NH 4^+, CH 3 NH 2, H 2 O The…2023 · asked 3×
CBSE Class 12 Chemistry past-paper question from the 2023board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.