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Coordination Compounds · Question 30

JEE Main 2026 (Online) 22nd January Evening ShiftMCQMedium📈 Topic in 55% papers+4−1
1

[Ni(PPh3)2Cl2] is a paramagnetic complex. Identify the INCORRECT statements about this complex. Choose the correct answer from the options given below :

  1. C and D Only
  2. A, B and D Only
  3. C, D and E Only
  4. A and B Only

Answer

(2) A, B and D Only

Solution

Ni is in the +2 state: Ni2+ = 3d8. A square planar (dsp2) d8 complex would be diamagnetic; since the complex is paramagnetic, it is sp3 hybridised, i.e. tetrahedral, with 2 unpaired electrons.

A. Tetrahedral complexes do not show geometrical isomerism (all four positions are adjacent to one another). Incorrect.

B. Ni2+ (d8) has partly filled d orbitals d–d transitions occur the complex is coloured, not white. Incorrect.

C. n = 2: = n(n+2) = 8 2.83 BM (≈ 2.84 BM). Correct.

D. Tetrahedral d8: e4 t24

CFSE = 4(-0.6 t) + 4(+0.4 t) = -0.8 t

t = 49 o CFSE = -0.8 49 o -0.36 o, not -0.8 o. Incorrect.

E. Ni(CO)4 is also tetrahedral (sp3). Correct.

Incorrect statements: A, B and D.

Answer: (2)

JEE Main 2026 (Online) 22nd January Evening Shift

Keep practising — Coordination Compounds

2

Given below are two statements : In the light of the above statements, choose the correct answer from the options given below :

  1. Statement I is false but Statement II is true
  2. Both Statement I and Statement II are false
  3. Both Statement I and Statement II are true
  4. Statement I is true but Statement II is false
JEE Main 2026 (Online) 21st January Morning Shift
3

Given below are two statements : In the light of the above statements, choose the correct answer from the options given below :

  1. Statement I is true but Statement II is false
  2. Both Statement I and Statement II are true
  3. Both Statement I and Statement II are false
  4. Statement I is false but Statement II is true
JEE Main 2026 (Online) 21st January Evening Shift
4

Identify the metal ions among Co2+, Ni2+, Fe2+, V3+ and Ti2+ having a spin-only magnetic moment value more than 3.0 BM. The sum of unpaired electrons present in the high spin octahedral complexes formed by those metal ions is .

JEE Main 2026 (Online) 21st January Evening Shift
5

Match the LIST-I with LIST-II Choose the correct answer from the options given below:

  1. A-I, B-II, C-III, D-IV
  2. A-IV, B-I, C-III, D-II
  3. A-III, B-II, C-I, D-IV
  4. A-III, B-IV, C-II, D-I
JEE Main 2025 (Online) 8th April Evening Shift
6

The number of species from the following that are involved in sp3d2 hybridization is : [Co(NH3)6]3+, SF6, [CrF6]3-, [CoF6]3-, [Mn(CN)6]3-, and [MnCl6]3-

  1. 4
  2. 3
  3. 5
  4. 6
JEE Main 2025 (Online) 8th April Evening Shift
7

Given below are two statements: In the light of the above statements, choose the correct answer from the options given below:

  1. Statement I is true but Statement II is false
  2. Both Statement I and Statement II are true
  3. Both Statement I and Statement II are false
  4. Statement I is false but Statement II is true
JEE Main 2025 (Online) 8th April Evening Shift
8

An octahedral complex having molecular composition Co 5NH3 Cl SO4 has two isomers A and B. The solution of A gives a white precipitate with AgNO3 solution and the solution of B gives white precipitate with BaCl2 solution. The type of isomerism exhibited by the complex is,

  1. Co-ordinate isomerism
  2. Ionisation isomerism
  3. Geometrical isomerism
  4. Linkage isomerism
JEE Main 2025 (Online) 7th April Morning Shift
9

The number of paramagnetic complexes among [FeF6]3-, [Fe(CN)6]3-, [Mn(CN)6]3-, [Co(C2O4)3]3-, [MnCl6]3-, and [CoF6]3-, which involve d2sp3 hybridization is .

JEE Main 2025 (Online) 7th April Morning Shift
10

Match List - I with List - II. Choose the correct answer from the options given below :

  1. A-I, B-III, C-II, D-IV
  2. A-II, B-III, C-IV, D-I
  3. A-I, B-IV, C-IV, D-III
  4. A-III, B-I, C-II, D-IV
JEE Main 2025 (Online) 7th April Evening Shift
11

The number of unpaired electrons responsible for the paramagnetic nature of the following complex species are respectively : [Fe(CN)6]3-, [FeF6]3-, [CoF6]3-, [Mn(CN)6]3-

  1. 1, 5, 4, 2
  2. 1, 4, 4, 2
  3. 1, 5, 5, 2
  4. 1, 1, 4, 2
JEE Main 2025 (Online) 7th April Evening Shift

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