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Coordination Compounds question

2025 · 3 Apr · Shift 1 · Q4
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Coordination Compounds question

2025 · 3 Apr · Shift 1 · Q4

JEE MainChemistryCoordination CompoundsMCQ+4 / −1

 Match the LIST-I with LIST-II \text { Match the LIST-I with LIST-II } Match the LIST-I with LIST-II 

LIST-I
(Molecules/ion)
LIST-II
(Hybridisation of central atom)
A.
PF5\mathrm{PF}_5PF5​
I
dsp2\mathrm{dsp}^2dsp2
B
SF6\mathrm{SF}_6SF6​
II
sp3 d\mathrm{sp}^3 \mathrm{~d}sp3 d
C
Ni(CO)4\mathrm{Ni}(\mathrm{CO})_4Ni(CO)4​
III
sp3 d2\mathrm{sp}^3 \mathrm{~d}^2sp3 d2
D
[PtCl4]2−\left[\mathrm{PtCl}_4\right]^{2-}[PtCl4​]2−
IV
sp3\mathrm{sp}^3sp3

 Choose the correct answer from the options given below: \text { Choose the correct answer from the options given below: } Choose the correct answer from the options given below: 

  1. A
    A-IV, B-I, C-II, D-III
  2. B
    A-III, B-I, C-IV, D-II
  3. C
    A-II, B-III, C-IV, D-I
  4. D
    A-I, B-II, C-III, D-IV
View written solutionFree

Correct answer: C

  1. Identify the hybridisation of each central atom/ion

We match each species in LIST-I with the correct hybridisation in LIST-II.


  1. For PF5\mathrm{PF}_5PF5​
  • Central atom: P\mathrm{P}P
  • Number of bond pairs around P = 5
  • Geometry: trigonal bipyramidal
  • Hybridisation: sp3d\mathrm{sp}^3dsp3d

So, A→IIA \to IIA→II


  1. For SF6\mathrm{SF}_6SF6​
  • Central atom: S\mathrm{S}S
  • Number of bond pairs around S = 6
  • Geometry: octahedral
  • Hybridisation: sp3d2\mathrm{sp}^3d^2sp3d2

So, B→IIIB \to IIIB→III


  1. For Ni(CO)4\mathrm{Ni(CO)}_4Ni(CO)4​
  • Nickel is in oxidation state 000
  • Electronic configuration of Ni\mathrm{Ni}Ni: [Ar]3d84s2[Ar]3d^84s^2[Ar]3d84s2
  • In Ni(CO)4\mathrm{Ni(CO)}_4Ni(CO)4​, due to strong field ligand CO, electrons pair up to give effective arrangement suitable for tetrahedral complex.
  • Known hybridisation of Ni(CO)4\mathrm{Ni(CO)}_4Ni(CO)4​ is sp3\mathrm{sp}^3sp3

So, C→IVC \to IVC→IV


  1. For [PtCl4]2−[\mathrm{PtCl}_4]^{2-}[PtCl4​]2−
  • Oxidation state of Pt: x+4(−1)=−2⇒x=+2x+4(-1)=-2 \Rightarrow x=+2x+4(−1)=−2⇒x=+2
  • So Pt is Pt2+\mathrm{Pt}^{2+}Pt2+
  • Pt2+\mathrm{Pt}^{2+}Pt2+ is a d8d^8d8 system
  • For 5d metal Pt2+\mathrm{Pt}^{2+}Pt2+, d8d^8d8 complexes are typically square planar
  • Square planar hybridisation is dsp2\mathrm{dsp}^2dsp2

So, D→ID \to ID→I


  1. Final matching

Thus we get: A−II,  B−III,  C−IV,  D−IA-II,\; B-III,\; C-IV,\; D-IA−II,B−III,C−IV,D−I

This corresponds to Option C.


  1. Comparison with stored answer

Stored correct answer = C

Our derived answer = C

So they agree.

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