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Coordination Chemistry

GATE Coordination Compounds and OrganometallicsCoordination CompoundsChemistry - CYIUPAC Formulation and NomenclatureNomenclature of Coordination CompoundsBonding in Coordination CompoundsBonding in Coordination Compounds

15 Questions Published
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Questions

Question 1 Multiple Choice (Single Answer)

Which of the following complexes are diamagnetic?
(1) [Co(NH3)6]3+
(2) [W(CO)6]
(3) [Cr(NH3)6]3+
(4) [Fe(CN)6]3-

  1. 1 and 2 only
  2. 1 and 3 only
  3. 2 and 3 only
  4. 2 and 4 only
  5. 2, 3, and 4 only
Question 2 Multiple Choice (Single Answer)

Which of the following complexes cannot exhibit geometrical isomerism?
i. [Ni(CN)4]2-
ii. [Zn(NH3)2Cl2]<o:p>
iii. [Pt(NH3)2Cl2]
iv. [Cr(NH3)6]3+

  1. i and ii only
  2. ii and iii only
  3. i, ii and iv only
  4. ii, iii and iv only
  5. iii and iv only
Question 3 Multiple Choice (Single Answer)

Which of the following statements is false?

  1. Central metal atoms/ions in coordination complexes are Lewis acids.
  2. The secondary valency represents oxidation number of the central metal ion.
  3. Ligands are Lewis bases.
  4. Coordination number of cobalt in the compound [Co(ox)3]3- is 6.
  5. Oxidation number of cobalt in complex ion [CoCl2(en)2]+ is + 3.
Question 4 Multiple Choice (Single Answer)

Which of the following complexes have square planar geometry?
i. [PtCl4]2-
ii. [NiCl4]2-
iii. [Pt(NH3)2Cl2]
iv. [Ni(CO)4]
v. [Ni(CN)4]2-

  1. i and ii only
  2. i, iii and iv only
  3. i, iii and v only
  4. ii, iv and v only
  5. iii and iv only
Question 5 Multiple Choice (Single Answer)

Which of the following ligands do not show linkage isomerism?
(1) SO32-
(2) NO2-
(3) EDTA4-<o:p>
(4) C2O42-
(5) SCN-

  1. 1 and 5 only
  2. 2 and 3 only
  3. 3 and 4 only
  4. 3, 4 and 5 only
  5. 2, 3 and 4 only
Question 6 Multiple Choice (Single Answer)

Which of the following is/are outer orbital complex(es)?

  1. [Co(NH3)6]3+
    2. [Fe(CN)6]3-
  2. ([FeF6]3–)
  1. 1 only
  2. 2 only
  3. 3 only
  4. 2 and 3 only
  5. All of the above
Question 7 Multiple Choice (Single Answer)

Which of the following sets represents bidentate ligands only?

  1. en, C2O42-, acac, dmpe
  2. EDTA, dmpe, SCN‑, NO2-
  3. dien, acac, dmpe, C2O42-
  4. EDTA, en, acac, SCN‑
  5. C2O42-, acac, dien, NO2-
Question 8 Multiple Choice (Single Answer)

Which of the following complexes is correctly named?

  1. K3[Fe(CN)6] : Tripotassium hexacyanoferrate(III)
  2. K4[Fe(CN)6] : Potassium hexacyanoferrate(IV)
  3. Cu(NH3)42 : Tetraamminecuprate(II) nitrate
  4. [Cr(NCS)4(NH3)2]- : Diamminetetrathiocyanatochromate(III) ion
  5. [Co(C2O4)(en)2]+ : Diethylenediammineoxalatocobalt(III) ion
Question 9 Multiple Choice (Single Answer)

Which of the following sets represents square planar complexes only?

  1. PtCl42-, AuCl4-, PdCl42-, Ni(CN)42-
  2. Ni(CO)4, CoCl42-, AuCl4-, Ni(CN)42-
  3. PtCl42-, PdCl42-, CoCl42-, Ni(CO)4
  4. AuCl4-, PdCl42-, Ni(CN)42-, Ni(CO)4
  5. PtCl42-, AuCl4-, CoCl42-, PdCl42-
Question 10 Multiple Choice (Single Answer)

Which of the following ‘Formula : Name’ combinations is incorrect?

  1. [Pt(NH3)3Br(NO2)Cl]Cl: Triamminebromochloronitroplatinum(IV) chloride
  2. [Cr(NH3)4(OH)2]Br: Tetraamminedihydroxochromate(III) bromide
  3. [Cr(en)2(NH3)Cl]SO4: Amminechlorobis(ethylenediamine)chromium(III) sulfate
  4. [Al(H2O)4(OH)2]Cl: Tetraaquadihydroxoaluminum(III) chloride
  5. Na2[CuCl4]: Sodium tetrachlorocuprate(II)
Question 11 Multiple Choice (Single Answer)

Which of the following is/are paramagnetic inner orbital complex/complexes?
i. [Co(C2O4)3]3–
ii. [Fe(CN)6]3–
iii. [Mn(CN)6]3–

  1. i only
  2. ii only
  3. i and ii only
  4. i and iii only
  5. ii and iii only
Question 12 Multiple Choice (Single Answer)

Which of the following coordination complexes is not correctly named?

  1. Ni(NH3)42: Tetraamminenickel(II) perchlorate
  2. [Au(CN)2]-: Dicyanoaurate(I) ion
  3. K3[Co(NO2)6]: Potassium hexanitrocobaltate(III)
  4. [Pt(en)(ONO)Cl]: Chloro(ethylenediamine)nitritoplatinum(II)
  5. [Fe(H2O)6]3+: Hexaaquairon(III) ion
Question 13 Multiple Choice (Single Answer)

Coordination number and the oxidation state of the cobalt in the [Cr(H2O)(en)2OH]+ respectively are

  1. 6 and + 1
  2. 6 and + 2
  3. 6 and + 3
  4. 3 and + 2
  5. 3 and + 3
Question 14 Multiple Choice (Single Answer)

Which of the following complexes are diamagnetic in nature?
(1) [CoF6]3-
(2) [Fe(CN)6]4-
(3) [Ni(CN)4]2-
(4) Zn(H2O)6]2+
(5) [Cr(H2O)6]3+

  1. 1, 2 and 3 only
  2. 2, 3 and 4 only
  3. 3, 4 and 5 only
  4. 1 and 5 only
  5. 3 and 5 only
Question 15 Multiple Choice (Single Answer)

Which of the following pairs represents inner orbital complexes only?

  1. [Co(NH3)6]3+ and [Cr(H2O)6]3+
  2. [FeF6]3- and [Zn(H2O)6]2+
  3. [Co(NH3)6]3+ and [Zn(H2O)6]2+
  4. [FeF6]3- and [Cr(H2O)6]3+
  5. [Zn(H2O)6]2+ and [Cr(H2O)6]3+
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