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Coordination Compounds · Question 1

NEET (UG) 2026MatchingMedium📈 Topic in 38% papers+4−1
1

Match List I with List II :

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

Answer

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

Solution

A. [PtCl2(NH3)2]: Pt2+, 5d8 ⇒ dsp2 hybridisation ⇒ square planar (III)

B. [Co(NH3)6]Cl3: Co3+, 3d6; NH3 pairs up the 3d electrons ⇒ d2sp3 ⇒ octahedral (I)

C. [NiCl4]2-: Ni2+, 3d8; Cl- is a weak field ligand, no pairing ⇒ sp3 ⇒ tetrahedral (IV)

D. [Fe(CO)5]: Fe(0), coordination number 5 ⇒ dsp3 ⇒ trigonal bipyramidal (II)

∴ A-III, B-I, C-IV, D-II

Answer: (3)

NEET (UG) 2026

Keep practising — Coordination Compounds

2

Which one of the following is an ambidentate ligand?

  1. Oxalate
  2. Ethane-1,2-diamine
  3. Thiocyanate
  4. Ethylenediaminetetraacetate ion
NEET (UG) 2026
3

The formula of tetraammineaquachloridocobalt(III) chloride is

  1. [Co(NH3)4(H2O)Cl]Cl2
  2. [Co(NH3)4Cl2] H2O
  3. [Co(NH3)4]Cl3 H2O
  4. [Co(NH3)4(H2O)Cl]Cl
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4

Given below are two statements: (Given : oxH2 = HOOC - COOH) In light of the above statements, choose the most appropriate answer from the options given below:

  1. Statement I is incorrect but Statement II is correct
  2. Both Statement I and Statement II are correct
  3. Both Statement I and Statement II are incorrect
  4. Statement I is correct but Statement II is incorrect
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5

The complex which has facial and meridional isomers is (Given : py = pyridine and en = H2N-CH2-CH2-NH2)

  1. [Ni(en)2(H2O)2]2+
  2. [Cr(py)3(Cl)3]
  3. [Cr(H2O)6]3+
  4. [Co(NH3)4(H2O)2]3+
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6

A 1 : 3 electrolyte in an aqueous solution is

  1. [Co(NH3)3(NO2)3]
  2. [CoCl2(NH3)4]Cl
  3. [CoCl(NH3)5]Cl2
  4. [Co(NH3)6]Cl3
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7

According to crystal field theory, the correct order of ligands with respect to their decreasing order of field strength is

  1. Cl- > NH3 > H2O > CO
  2. CO > NH3 > H2O > Cl-
  3. CO > H2O > NH3 > Cl-
  4. Cl- > H2O > NH3 > CO
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8

Among the species given below, the spin-only magnetic moment is highest for (Given: Atomic number of Ti = 22, Mn = 25, Fe = 26 and Co = 27)

  1. [Ti(H2O)6]3+
  2. [Mn(CN)6]3-
  3. [Fe(CN)6]3-
  4. [Co(NH3)6]3+
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9

Out of the following complex compounds, which of the compound will be having the minimum conductance solution?

  1. [Co(NH3)6]Cl3
  2. [Co(NH3)5Cl]Cl
  3. [Co(NH3)3Cl3]
  4. [Co(NH3)4Cl2]
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10

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
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11

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
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