• Coordination Chemistry
Back
0

Coordination Chemistry

Description: GATE Coordination Compounds and OrganometallicsCoordination CompoundsChemistry - CYIUPAC Formulation and NomenclatureNomenclature of Coordination CompoundsBonding in Coordination CompoundsBonding in Coordination Compounds
Number of Questions: 15
Created by:
Tags: GATE Coordination Compounds and Organometallics Coordination Compounds Chemistry - CY IUPAC Formulation and Nomenclature Nomenclature of Coordination Compounds Bonding in Coordination Compounds
Start the Quiz
Attempted 0/15 Correct 0 Score 0
‹
›

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

Show answer
Correct Option: A
Explanation:

[Co(NH3)6]3+ - t2g6 eg0 ; no unpaired electrons; diamagnetic [W(CO)6] - t2g6 eg0 ; no unpaired electrons; diamagnetic

Which of the following complexes cannot exhibit geometrical isomerism? i. [Ni(CN)4]2-
ii. [Zn(NH3)2Cl2]

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

Show answer
Correct Option: C
Explanation:

[Ni(CN)4]2- homoleptic complex with tetrahedral geometry. Homoleptic complex does not show geometrical isomerism. [Zn(NH3)2Cl2] is a heteroleptic complex with tetrahedral geometry. 

Tetrahedral complex does not exhibit geometrical isomerism, as all the four ligand positions are equivalent. [Pt(NH3)2Cl2] is a heteroleptic  square planar complex of Ma2b2 type. In a square planar complex of formula [Ma2b2], the two similar ligands may be arranged adjacent to each other in a cis isomer or opposite to each other in a trans isomer. [Co(NH3)6]3+homoleptic complex ion with octahedral geometry. Homoleptic complex does not show geometrical isomerism.

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.

Show answer
Correct Option: B
Explanation:

The secondary valency represents coordination number of the central metal ion.

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

Show answer
Correct Option: C
Explanation:

[PtCl4]2-: Inner orbital complex; square planar geometry; dsp2 hybridisation [Pt(NH3)2Cl2] -: Inner orbital complex; square planar geometry; dsp2 hybridisation [Ni(CN)4]2-: Inner orbital complex; square planar geometry; dsp2 hybridisation

Which of the following ligands do not show linkage isomerism? (1) SO32-
(2) NO2-
(3) EDTA4-


(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

Show answer
Correct Option: C
Explanation:

Linkage isomerism is only shown by ambidentate ligands. EDTA4- (hexadentate ligand), is not a ambidentate ligand. Hence, it will not show linkage isomerism. C2O42- (bidentate ligand) is not a ambidentate ligand. Hence, it will not show linkage isomerism.

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

Show answer
Correct Option: C
Explanation:

[FeF6]3– has an octahedral shape. F is a weak-field ligand. The d electron configuration for Fe3+ is d5. The splitting energy is small. Inner d orbitals will take part in hybridisation (sp3d2 hybridisation). Therefore, [FeF6]3– is outer orbital complex.

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-

Show answer
Correct Option: A
Explanation:

Ethylenediammine (en): Bidentate ligand

Oxalate ion (C2O42-): Bidentate ligand Acetylacetonate ion (acac): Bidentate ligand Dimethylphosphinomethane (dmpe): Bidentate ligand

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)4](NO32 : Tetraamminecuprate(II) nitrate

  4. [Cr(NCS)4(NH3)2]- : Diamminetetrathiocyanatochromate(III) ion

  5. [Co(C2O4)(en)2]+ : Diethylenediammineoxalatocobalt(III) ion

Show answer
Correct Option: D
Explanation:

It is correctly named. [Cr(NCS)4(NH3)2]- : Diamminetetrathiocyanatochromate(III) ion 

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-

Show answer
Correct Option: A
Explanation:

PtCl42-, AuCl4-, PdCl42-, Ni(CN)42- : All are square planar complexes.

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)

Show answer
Correct Option: B
Explanation:

Correct IUPAC name of [Cr(NH3)4(OH)2]Br is tetraamminedihydroxochromium(III) bromide.

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

Show answer
Correct Option: E
Explanation:

[Fe(CN)6]3– : Inner orbital complex; d2sp3 hybridisation; paramagnetic [Mn(CN)6]3– : Inner orbital complex; d2sp3 hybridisation; paramagnetic

Which of the following coordination complexes is not correctly named?

  1. [Ni(NH3)4](ClO42: Tetraamminenickel(II) perchlorate

  2. [Au(CN)2]-: Dicyanoaurate(I) ion

  3. K3[Co(NO2)6]: Potassium hexanitrocobaltate(III)

  5. [Fe(H2O)6]3+: Hexaaquairon(III) ion

Show answer
Correct Option: D
Explanation:

Correct IUPAC name of [Pt(en)(ONO)Cl] is chloro(ethylenediamine)nitritoplatinum(II).

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

Show answer
Correct Option: B
Explanation:

Coordination number and the oxidation state of the cobalt in the [Cr(H2O)(en)2OH]+ are 6 and + 2 respectively.

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

Show answer
Correct Option: B
Explanation:

[Fe(CN)6]4- is an inner orbital complex with octahedral geometry (d2sp3 hybridisation); no unpaired electrons; diamagnetic [Ni(CN)4]2- is an inner orbital complex with square planar geometry (dsp2 hybridisation); no unpaired electrons; diamagnetic Zn(H2O)6]2+ is an outer orbital complex with square planar geometry (sp3d2 hybridisation); no unpaired electrons; diamagnetic

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+

Show answer
Correct Option: A
Explanation:

[Co(NH3)6]3+ is an inner orbital complex with octahedral geomtry (d2sp3 hybridisation). [Cr(H2O)6]3+ is an inner orbital complex with octahedral geomtry (d2sp3 hybridisation).

- Hide questions
ADVERTISEMENT

Find more quizzes from top tags

general knowledge
3615 Quizzes
119858 Questions
 technology
307 Quizzes
36705 Questions
 sports
963 Quizzes
19148 Questions
 history
1187 Quizzes
13475 Questions
 physics
598 Quizzes
13441 Questions
 biology
1160 Quizzes
12174 Questions
 science & technology
551 Quizzes
11015 Questions
 chemistry
490 Quizzes
9892 Questions
 maths
518 Quizzes
9324 Questions
 softskills
0 Quizzes
7131 Questions