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Coordination Compounds · Question 10

NEET (UG) 2025MCQMedium📈 Topic in 38% papers+4−1
1

Which of the following are paramagnetic? Choose the correct answer from the options given below :

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

Answer

(1) A and D only

Solution

A. [NiCl4]2-: Ni2+ (3d8); Cl- is a weak field ligand, so no pairing; sp3, tetrahedral → 2 unpaired electrons → paramagnetic.

B. Ni(CO)4: Ni(0), 3d and 4s electrons pair up to 3d10; sp3 → no unpaired electron → diamagnetic.

C. [Ni(CN)4]2-: CN- is a strong field ligand, the two 3d electrons pair up; dsp2, square planar → diamagnetic.

D. [Ni(H2O)6]2+: 3d8, octahedral (sp3d2) → 2 unpaired electrons → paramagnetic.

E. Ni(PPh3)4: Ni(0), 3d10, sp3 → diamagnetic.

∴ Paramagnetic: A and D only.

Answer: (1)

NEET (UG) 2025

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2

The correct order of the wavelength of light absorbed by the following complexes is, A. [Co(NH3)6]3+ B. [Co(CN)6]3- C. [Cu(H2O)4]2+ D. [Ti(H2O)6]3+ Choose the correct answer from the options given below:

  1. C < D < A < B
  2. C < A < D < B
  3. B < D < A < C
  4. B < A < D < C
NEET (UG) 2025
3

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

  1. A-II, B-III, C-IV, D-I
  2. A-I, B-III, C-IV, D-II
  3. A-I, B-IV, C-III, D-II
  4. A-II, B-IV, C-III, D-I
NEET (UG) 2024
4

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 true
  2. Both Statement I and Statement II are false
  3. Statement I is true but Statement II is false
  4. Statement I is false but Statement II is true
NEET (UG) 2024
5

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 true
  2. Both Statement I and Statement II are false
  3. Statement I is true but Statement II is false
  4. Statement I is false but Statement II is true
NEET (UG) 2024
6

Ethylene diaminetetraacetate ion is a/an:

  1. hexadentate ligand
  2. ambidentate ligand
  3. monodentate ligand
  4. bidentate ligand
RE-NEET (UG) 2024
7

Which of the following is not an ambidentate ligand?

  1. C2O42-
  2. SCN-
  3. NO2-
  4. CN-
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8

[ Mn2(CO)10] and [Co2(CO)8] structures have Choose the correct answer from the options given below

  1. Only A, B, C
  2. Only B, C, D
  3. Only A, C, D
  4. Only A, B, D
RE-NEET (UG) 2024
9

Homoleptic complex from the following complexes is:

  1. Diamminechloridonitrito-N-platinum(II)
  2. Pentaamminecarbonatocobalt(III) chloride
  3. Triamminetriaquachromium(III) chloride
  4. Potassium trioxalatoaluminate(III)
NEET (UG) 2023
10

Which complex compound is most stable?

  1. [Co(NH3)3(NO3)3]
  2. [CoCl2(en)2]NO3
  3. [Co(NH3)6]2(SO4)3
  4. [Co(NH3)4(H2O)Br](NO3)2
NEET (UG) 2023
11

The IUPAC name of the complex [Ag(H2O)2][Ag(CN)2] is:

  1. dicyanidosilver(II) diaquaargentate(II)
  2. diaquasilver(II) dicyanidoargentate(II)
  3. dicyanidosilver(I) diaquaargentate(I)
  4. diaquasilver(I) dicyanidoargentate(I)
NEET (UG) 2022

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