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Coordination Compounds · Question 50

JEE Main 2025 (Online) 2nd April Morning ShiftMCQEasy📈 Topic in 55% papers+4−1
1

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

  1. Both Statement I and Statement II are incorrect
  2. Statement I is correct but Statement II is incorrect
  3. Statement I is incorrect but Statement II is correct
  4. Both Statement I and Statement II are correct

Answer

(4) Both Statement I and Statement II are correct

Solution

Statement I: If o < P (weak field ligand), the fourth electron enters an eg orbital ( t2g3 eg1) maximum unpaired electrons high spin.

If o > P (strong field ligand), pairing occurs in t2g ( t2g4 eg0) low spin. Statement I is correct.

Statement II: As per NCERT, t = 49 o, so the splitting is too small to force pairing.

t < P in practice, so low spin tetrahedral complexes are rarely formed. Statement II is correct.

Answer: (4)

JEE Main 2025 (Online) 2nd April Morning Shift

Keep practising — Coordination Compounds

2

A transition metal (M) among Mn, Cr, Co and Fe has the highest standard electrode potential (M3+/M2+). It forms a metal complex of the type [M(CN)6]4-. The number of electrons present in the eg orbital of the complex is .

JEE Main 2025 (Online) 2nd April Morning Shift
3

The type of hybridization and the magnetic property of [MnCl6]3- are,

  1. sp3d2, paramagnetic with four unpaired electrons.
  2. d2sp3, paramagnetic with four unpaired electrons.
  3. sp3d2, paramagnetic with two unpaired electrons.
  4. d2sp3, paramagnetic with two unpaired electrons.
JEE Main 2025 (Online) 2nd April Evening Shift
4

The d-orbital electronic configuration of the complex among [Co(en)3]3+, [CoF6]3-, [Mn(H2O)6]2+ and [Zn(H2O)6]2+ that has the highest CFSE is:

  1. t2g6eg0
  2. t2g3eg2
  3. t2g4eg2
  4. t2g6eg4
JEE Main 2025 (Online) 2nd April Evening Shift
5

The correct increasing order of stability of the complexes based on 0 value is : I. [Mn(CN)6]3- II. [Co(CN)6]4- III. [Fe(CN)6]4- IV. [Fe(CN)6]3-

  1. I < II < IV < III
  2. IV < III < II < I
  3. III < II < IV < I
  4. II < III < I < IV
JEE Main 2025 (Online) 29th January Morning Shift
6

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

  1. (A)-(III), (B)-(I), (C)-(I), (D)-(IV)
  2. (A)-(III), (B)-(II), (C)-(III), (D)-(IV)
  3. (A)-(IV), (B)-(II), (C)-(I), (D)-(III)
  4. (A)-(IV), (B)-(I), (C)-(II), (D)-(III)
JEE Main 2025 (Online) 29th January Morning Shift
7

Match 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)-(III), (B)-(IV), (C)-(I), (D)-(II)
  3. (A)-(I), (B)-(IV), (C)-(III), (D)-(II)
  4. (A)-(III), (B)-(II), (C)-(I), (D)-(IV)
JEE Main 2025 (Online) 28th January Evening Shift

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