Chapter-9 Coordination Compounds MCQs
Q 1.: How many isomers are possible in [Co(en)2Cl2] ?
(A) One
(B) Two
(C) Four
(D) Six
Option – C
Q 2.: Which of the following complexes have lowest molar conductance ?
(A) CoCl3 . 6NH3
(B) CoCl3 . 5NH3
(C) CoCl3 . 4NH3
(D) CoCl3 . 3NH3
Option – D
Q 3.: The IUPAC name of the complex ion formed when gold dissolves in Aqua-regia is :
(A) tetrachloridoaurate(III)
(B) tetrachloridoaurate(II)
(C) tetrachloridoaurate(I)
(D) dichloridoaurate(III)
Option – A
Q 4.: In [CoF6]–3 , Co+3 uses outer d-orbitals (4d) in sp3d2 hybridisation. The number of unpaired electrons present in complex ion is :
(A) One
(B) Two
(C) Three
(D) Four
Option – D
Q 5.: Crystal field theory does not explain which of the following property of coordination compounds ?
(A) The covalent character of the bond between metal and the ligand
(B) Magnetic property
(C) Colour
(D) Structure of coordination compounds
Option – A
Q 6.: A magnetic moment of 1.73 BM will be shown by one among the following.
(A) [TiCl4]
(B) [CoCl6]–4
(C) [Cu(NH3)4]+2
(D) [Ni(CN)4] –2
Option – C
Q 7.: The complex used as an anticancer agent is ;
(A) mer-[Co(NH3)3Cl3]
(B) cis-[PtCl2(NH3)2]
(C) cis-K2[PtCl2Br2]
(D) trans-K2[PtCl2Br2]
Option – B
Q 8.: The hybridization of central metal ion in K2[Ni(CN)4] and K2[NiCl4] are respectively
(A) dsp2 , sp3
(B) sp3 , sp3
(C) sp3 , sp3d2
(D) dsp2 , d2sp3
Option – A
Q 9.: Red precipitate is obtained when ethanol solution of dimethylglyoxime is added to ammoniacal Ni+2 solution. Which of the following statement is not true ?
(A) Red complex has a square planar geometry
(B) Complex has symmetrical H-bonding
(C) Dimethylglyoxime functions as bidentate ligand
(D) Red complex has a tetrahedral geometry
Option – D
Q 10.: The IUPAC name of K2[Ni(CN)4] is
(A) potassium tetracyanatonickelate(III)
(B) potassium tetracyanatonickel(II)
(C) potassium tetracyanonickelate(II)
(D) potassium tetracyanonickel(III)
Option – C
Q 11.: Which of the following complex ion is diamagnetic in nature ?
(A) [CoF6] –3
(B) [Ni(CN)4] –2
(C) [NiCl4] –2
(D) [CuCl2] –2
Option – B
Q 12.: The ligand N(CH2CH2NH2)3 is
(A) Bidentate
(B) Tridentate
(C) Tetradentate
(D) Pentadentate
Option – C
Q 13.: Ammonia gas does not evolve from the complex FeCl3 .4NH3 but it fives white precipitate with aqueous solution of AgNO3. Coordination number of central metal ion in the above complex is six. Give IUPAC name of the complex.
(A) Dichlorotetraammineferric(III) chloride
(B) Dichlorotetraammineferrate(II) chloride
(C) Tetraammineferric(III) chloride
(D) Ammoniumtrichloridetriammineferric(III)
Option – A
Q 14.: Crystal field stabilisation energy for high spin d4 octahedral complex is :
(A) ―1.6 Δo
(B) ―0.6 Δo
(C) ―0.4 Δo
(D) ―1.2 Δo
Option – B
Q 15.: Number of isomeric forms (linkage and stereoisomers) for[Rh(en)2(NO2)(SCN)]+1 are
(A) Three
(B) Six
(C) Nine
(D) Twelve
Option – D
Q 16.: The existence of two different coloured complexes with the composition [Co(NH3)4Cl2]+1 is due to
(A) Ionisation isomerism
(B) Linkage isomerism
(C) Geometrical isomerism
(D) Coordination isomerism
Option – C
Q 17.: The name of the complex [Pt(NH3)6]Cl4 is
(A) hexaammineplatinum(IV) chloride
(B) hexaammineplatinum (II) chloride
(C) tetrachlorohexammineplatinum(IV)
(D) tetrachlorohexammineplatinum(II)
Option – A
Q 18.: Choose the correct statement
(A) [Co(NH3)6]+2 is oxidised to diamagnetic [Co(NH3)6]+3 by the oxygen in air
(B) Tetrahedral complexes are more stable than octahedral complexes
(C) [Fe(CN)6]–3 is stable but [FeF6]–3 is unstable
(D) The [Cu(NH3)4]+2 ion has a tetrahedral geometry and is diamagnetic
Option – A
Q 19.: Which one of the following is wrongly match ?
(A) [Cu(NH3)4]+2 = Square planar
(B) [Co(en)3]+3 = Follows EAN rule
(C) [Ni(CO)4] = Neutral ligand
(D) [Fe(CN)6]–3 = sp3d2
Option – D
Q 20.: Show the coordination number of the metal ion, its oxidation number, the number of electrons in d-orbitals and the number of unpaired electrons in d-orbitals respectively in complex [Co(H2O)4SO3]Cl.
(A) 6, 3, 6, 0
(B) 6, 3, 6, 4
(C) 5, 3, 6, 0
(D) 5, 3, 6, 4
Option – B
Q 21.: In which one of the pairs of ions given, there is an ion that forms a coordination compound with both aqueous sodium hydroxide and ammonia and another ion that forms a coordination compound only with aqueous sodium hydroxide ?
(A) Cu+2 , Zn+2
(B) Zn+2 , Al+3
(C) Al+3 , Cu+2
(D) Pb+2 , Cu+2
Option – B
Q 22.: Which of the following salts is colourless ?
(A) CdCl2
(B) CuSO4.5H2O
(C) MnSO4.7H2O
(D) NiSO4.7H2O
Option – A
Q 23.: Which of the following ligands is not a chelating agent ?
(A) EDTA
(B) en
(C) Oxalate
(D) Pyridine
Option – D
Q 24.: Which one of the following is an outer orbital complex and exhibits paramagnetic behaviour ?
(A) [Zn(NH3)6]+2
(B) [Ni(NH3)6]+2
(C) [Cr(NH3)6]+3
(D) [Co(NH3)6]+3
Option – B
Q 25.: Which of the following compounds shows optical isomerism ?
(A) [Co(CN)6]–3
(B) [Cu(NH3)4]+2
(C) [Cr(C2O4)3]+3
(D) [ZnCl4] –2
Option – C
Q 26.: The d-electronic configuration of Cr+2 , Mn+2 , Fe+2 and Co+2 are d4, d5, d6 and d7 respectively. Which one of the following will exhibit minimum paramagnetic behaviour ? (At. No. of Cr=24, Mn=25, Fe=26, Co=27)
(A) [Cr(H2O)6]+2
(B) [Mn(H2O)6]+2
(C) [Fe(H2O)6]+2
(D) [Co(H2O)6]+2
Option – D
Q 27.: The complex [Pt(py)(NH3)BrCl] will have how many geometrical isomerism ?
(A) One
(B) Two
(C) Three
(D) Four
Option – C
Q 28.: In the brown ring complex [Fe(H2O)5(NO)]SO4 , nitric oxide behave as :
(A) NO+1
(B) NO–1
(C) Neutral
(D) NO–2
Option – A
Q 29.: The effective atomic number of Cr (At no. 24) in [Cr(NH3)6]Cl3 in solution ?
(A) 27
(B) 35
(C) 36
(D) 33
Option – D
Q 30.: Which of the following complex ion is not expected to absorb visible light ?
(A) [Ni(H2O)6]+2
(B) [Ni(CN)4]–2
(C) [Cr(NH3)6]+3
(D) [Fe(H2O)6]+2
Option – B
Q 31.: Among the following complexes, the one which show zero crystal field stabilization energy (CFSE) is :
(A) [Mn(H2O)6]+3
(B) [Fe(H2O)6]+3
(C) [Co(H2O)6]+2
(D) [Co(H2O)6]+3
Option – B
Q 32.: Which of the following compounds show optical isomerism ?
I. cis-[Co(NH3)4Cl2]+1
II. trans-[Co(en)2Cl2]+1
III. cis-[Co(en)2Cl2]+1
IV. [Co(en)3]+3
(A) I and II
(B) II and III
(C) III and IV
(D) I, III and IV
Option – C
Q 33.: The oxidation number of Co in [Co(NH3)3(NO2)3] is
(A) 0
(B) +2
(C) +3
(D) +5
Option – C
Q 34.: Compound [PtCl2(NH3)4]Br2 and [PtBr2(NH3)4]Cl2 shows the following type of isomerism.
(A) Ionisation isomerism
(B) Hydrated isomerism
(C) Linkage isomerism
(D) Coordination position isomerism
Option – A
Q 35.: The complexes [Co(NH3)6][Cr(CN)6] and [Cr(NH3)6][Co(CN)6] are the examples of which type of isomerism ?
(A) Ionisation isomerism
(B) Hydrated isomerism
(C) Linkage isomerism
(D) Coordination isomerism
Option – D
Q 36.: [Se(H2O)6]+3 ion is
(A) Colourless and diamagnetic
(B) Colourless and paramagnetic
(C) Coloured and octahedral
(D) Coloured and paramagnetic
Option – A
Q 37.: The pair of compounds that can exist together is :
(A) HgCl2 , SnCl2
(B) FeCl3 , SnCl2
(C) FeCl2 , SnCl2
(D) FeCl3 , KI
Option – C
Q 38.: EDTA has coordination number
(A) Three
(B) Four
(C) Five
(D) Six
Option – D
Q 39.: The coordination number of platinum in [Pt(NH3)4Cl2]+2 ion is
(A) Two
(B) Four
(C) Six
(D) Eight
Option – C
Q 40.: How many ions are produced from [Co(NH3)6]Cl3 in solution ?
(A) Two
(B) Three
(C) Four
(D) Six
Option – C