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Coordination Compounds · Question 56

JEE Main 2025 (Online) 28th January Evening ShiftMatchingEasy📈 Topic in 42% papers+4−1
1

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)

Answer

(4) (A)-(III), (B)-(II), (C)-(I), (D)-(IV)

Solution

(A) [CoF6]3-: Co3+, 3d6; F- is a weak-field ligand, no pairing outer-orbital complex, sp3d2 (III).

(B) [NiCl4]2-: Ni2+, 3d8; Cl- is weak field, no pairing tetrahedral, sp3 (II).

(C) [Co(NH3)6]3+: Co3+, 3d6; NH3 pairs the electrons (two 3d orbitals vacant) inner-orbital, d2sp3 (I).

(D) [Ni(CN)4]2-: Ni2+, 3d8; CN- is strong field, the eight electrons pair up in four 3d orbitals square planar, dsp2 (IV).

(A)-(III), (B)-(II), (C)-(I), (D)-(IV)

Answer: (4)

JEE Main 2025 (Online) 28th January Evening Shift

Keep practising — Coordination Compounds

2

Number of paramagnetic complexes among the following is . [MnBr4]2-, [NiCl4]2-, [Ni(CN)4]2-, [Ni(CO)4], [CoF6]3-, [Fe(CN)6]4-, [Mn(CN)6]3-, [Ti(CN)6]3-, [Cu(H2O)6]2+, [Co(C2O4)3]3-

JEE Main 2026 (Online) 8th April Evening Shift
3

Match the LIST-I with LIST-II

  1. A-III, B-IV, C-II, D-I
  2. A-III, B-I, C-IV, D-II
  3. A-III, B-IV, C-I, D-II
  4. A-II, B-I, C-IV, D-III
JEE Main 2026 (Online) 6th April Morning Shift
4

Which of the following are true about the energy of the given d-orbitals of a tetrahedral complex? Choose the correct answer from the options given below :

  1. A, B and D only
  2. A and B only
  3. B and D only
  4. B, C and D only
JEE Main 2026 (Online) 6th April Morning Shift
5

Which of the following sequences of hybridisation, geometry and magnetic nature are correct for the given coordination compounds ? Choose the correct answer from the options given below :

  1. A, B, C and D
  2. B, C and D only
  3. A, C and D only
  4. A, B and D only
JEE Main 2026 (Online) 6th April Evening Shift
6

An excess of AgNO3 is added to 100 mL of a 0.05 M solution of tetraaquadichloridochromium (III) chloride. The number of moles of AgCl precipitated will be 10-3. (Nearest integer)

JEE Main 2026 (Online) 6th April Evening Shift
7

The correct statements about metal carbonyls are Choose the correct answer from the options given below :

  1. A and B Only
  2. A, C and D Only
  3. B and C Only
  4. A and D Only
JEE Main 2026 (Online) 5th April Morning Shift
8

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

  1. Both Statement I and Statement II are correct
  2. Both Statement I and Statement II are incorrect
  3. Statement I is correct but Statement II is incorrect
  4. Statement I is incorrect but Statement II is correct
JEE Main 2026 (Online) 5th April Morning Shift
9

Identify the correct statements from the following Choose the correct answer from the options given below :

  1. A, B, C, D and E
  2. B, C and D only
  3. A, C and D only
  4. A, C and E only
JEE Main 2026 (Online) 5th April Evening Shift
10

The total number of unpaired electrons present in the d3, d4 (low spin) d5 (high spin), d6 (high spin) and d7 (low spin) octahedral complex systems is .

JEE Main 2026 (Online) 5th April Evening Shift
11

Consider the metal complexes [Ni(en)3]2+ (A), [NiCl4]2- (B) and [Ni(NH3)6]2+ (C). Choose the CORRECT option by considering the number of unpaired electrons present in (A), (B) and (C) respectively and the order of frequency of absorption.

  1. 2, 2, 2 and (A) > (C) > (B)
  2. 0, 2, 0 and (A) > (C) > (B)
  3. 2, 2, 0 and (B) > (C) > (A)
  4. 2, 2, 2 and (C) > (A) > (B)
JEE Main 2026 (Online) 4th April Evening Shift

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