Multiple Choice Questions (MCQs) for Class 12 Chemistry: Unit 5 Coordination Compounds
Access targeted multiple-choice questions for Unit 5 Coordination Compounds designed to align with the latest CBSE academic syllabus for Class 12 Chemistry. These objective practice sets help students evaluate their conceptual understanding and improve exam readiness.
Practice Unit 5 Coordination Compounds MCQs for Class 12 Chemistry
Access the complete set of multiple-choice questions for Unit 5 Coordination Compounds below. This focused format allows students to isolate specific topics for thorough review and uninterrupted practice alongside official CBSE textbooks.
Question. Which of the following ligands is expected to be bidentate?
(a) CH3NH2
(b) CH3C N
(c) Br
(d) C2O42-
Answer : D
Question. The name of complex ion, [Fe(CN)6]3– is
(a) hexacyanitoferrate(III) ion
(b) tricyanoferrate(III) ion
(c) hexacyanidoferrate(III) ion
(d) hexacyanoiron(III) ion.
Answer : C
Question. The correct IUPAC name for [CrF2(en)2]Cl is
(a) chlorodifluoridoethylenediaminechromium (III) chloride
(b) difluoridobis(ethylene diamine)chromium (III) chloride
(c) difluorobis-(ethylene diamine)chromium (III) chloride
(d) chlorodifluoridobis(ethylene diamine) chromium (III).
Answer : B
Question. The hypothetical complex chlorodiaquatriammine cobalt(III) chloride can be represented as
(a) [CoCl(NH3)3(H2O)2]Cl2
(b) [Co(NH3)3(H2O)Cl3]
(c) [Co(NH2)3(H2O)2Cl]
(d) [Co(NH3)3(H2O)3]Cl3
Answer : A
Question. IUPAC name of [Pt(NH3)3(Br)(NO2)Cl]Cl is
(a) triamminebromochloronitroplatinum(IV) chloride
(b) triamminebromonitrochloroplatinum(IV) chloride
(c) triamminechlorobromonitroplatinum(IV) chloride
(d) triamminenitrochlorobromoplatinum(IV) chloride.
Answer : A
Question. The complexes [Co(NH3)6][Cr(CN)6] and [Cr(NH3)6][Co(CN)6] are the examples of which type of isomerism?
(a) Linkage isomerism
(b) Ionization isomerism
(c) Coordination isomerism
(d) Geometrical isomerism
Answer : C
Question. Which of the following complexes is used to be as an anticancer agent?
(a) mer-[Co(NH3)3Cl3]
(b) cis-[PtCl2(NH3)2]
(c) cis-K2[PtCl2Br2]
(d) Na2CoCl4
Answer : B
Question. Copper sulphate dissolves in excess of KCN to give
(a) Cu(CN)2
(b) CuCN
(c) [Cu(CN)4]3–
(d) [Cu(CN)4]2–
Answer : C
Question. Which complex compound possesses sp3 d2 hybtidisation?
(a) [Fe(NH3)6 ]3+
(b) [Fe(CN)6 ]4-
(c) [Fe(CN)6 ]3-
(d) [Fe(Cl)6 ]3-
Answer : D
Question. When EDT A solution is added to Mg2+ ion solution, then which of the following statements is not true?
(a) Four coordinate sites of Mg2+ are occupied by EDTA and remaining two sites are occupied by water molecules
(b) All six coordinate sites of Mg2+ are occupied
(c) pH of the solution is decreased.
(d) Colourless [Mg-EDTA]2- chelate is formed
Answer : A
Question. In which of the following octahedral complexes of Co (atomic number 27) will be magnitude of Δo be the hlghest?
(a) [Co(CN)6]3-
(b) [Co(C2O4)3]3-
(c) [Co(H2O)6]3+
(d) [Co(NH3)6]3+
Answer : A
Question. The number of unpaired electrons calculated in [Co(NH3)6 ]3+ and [Co(F6 )]3- are
(a) 4 and 4
(b) 0 and 2
(c) 2 and 4
(d) 0 and 4
Answer : D
Question. An octahedral complex is fom1ed when hybrid orbitals of the following type are involved
(a) sp3
(b) dsp2
(c) d2sp3
(d) sp2d2
Answer : C
Question. Which of the following shell, form only an outer octahedral complex ?
(a) d4
(b) d8
(c) d6
(d) None of these
Answer : C
Question. Hybridisation, shape and magnetic moment of K3[Co(CO3)3 ] is
(a) d2sp3 , octahedral, 4.9 BM
(b) sp3d 2, octahedral, 4.9 BM
(c) dsp2 , square planar, 4.9 BM
(d) sp3, tetrahedral, 4.9 BM
Answer : C
Question. [Ni(CN)4 ]2- , [MnBr4 ]2- and [CoF6 ]3- , geometry,hybridisation and magnetic moment of the ions respectively,are
(a) tetrahedral, square planar, octahedral :
sp3, dsp2, sp3d2 : 5.9, 0, 4.9
(b) tetrahedral, square planar, octahedral:
dsp2 , sp3 , sp3d2 : 0, 5.9, 4.9
(c) square planar, tetrahedral, octahedral:
dsp2 ,sp3 , d2sp3 : 5.9, 4.9, 0
(d) square planar, tetrahedral, octahedral:
dsp2, sp3, sp3d2 : 0, 5.9, 4.9
Answer : D
Question. The reaction, [Fe(CNS)6 ]3- → [FeF6 ]3– talces place with
(a) decrease in magnetic moment
(b) increase in magnetic moment
(c) decrease in coordination number
(d) increase in coordination number
Answer : C
Question. The number of unpaired electrons in the square planar [Pt(CN)4 ]2- ion is
(a) 2
(b) 1
(c) 0
(d) 3
Answer : C
Question. Which has maximum paramagnetic character?
(a) [Fe(CN)6 ]4-
(b) [Cu(H2O)4 ]2+
(c) [Cu(NH3 )4 ]2+
(d) [Mn(H2O)6 ]2+
Answer : D
Question. In which of the following complex ion, the central metal ion is in a state of sp3d2 hybridisation?
(a) [CoF6)]3-
(b) [Co(NH3)6 ]3+
(c) [Fe(CN)6]
(d) [Cr(NH3)6 ]3+
Answer : A
Question. Which one of the following complexes is not expected to exhibit isomerism?
(a) [Ni(NH3)4(H2O)2]2+
(b) [Pt(NH3)2Cl2]
(c) [Ni(NH3)2Cl2]
(d) [Ni(en)3]2+
Answer : C
Question. Which of the following does not show optical isomerism?
(a) [Co(NH3)3Cl3]0
(b) [Co(en)Cl2(NH3)2]+
(c) [Co(en)3]3+
(d) [Co(en)2Cl2]+(en = ethylenediamine)
Answer : A
Question. Which of the following will give a pair of enantiomorphs?
(a) [Cr(NH3)6][Co(CN)6]
(b) [Co(en)2Cl2]Cl
(c) [Pt(NH3)4][PtCl6]
(d) [Co(NH3)4Cl2]NO2 (en = NH2CH2CH2NH2
Answer : C
Question. [CoNH(3)4(NO2)2]Cl exhibits
(a) linkage isomerism, geometrical isomerism and optical isomerism
(b) linkage isomerism, ionization isomerism and optical isomerism
(c) linkage isomerism, ionization isomerism and geometrical isomerism
(d) ionization isomerism, geometrical isomerism and optical isomerism.
Answer : C
Question. Which one of the following is expected to exhibit optical isomerism? (en = ethylenediamine)
(a) cis-[Pt(NH3)2Cl2]
(b) trans-[Pt(NH3)2Cl2]
(c) cis-[Co(en)2Cl2]+
(d) trans-[Co(en)2Cl2]+
Answer : C
Question. Which of the following coordination compounds would exhibit optical isomerism?
(a) Pentaamminenitrocobalt(III) iodide
(b) Diamminedichloroplatinum(II)
(c) trans-Dicyanobis(ethylenediamine)chromium(III) chloride
(d) tris-(Ethylenediamine)cobalt(III) bromide
Answer : D
Question. Which of the following will give maximum number of isomers?
(a) [Co(NH3)4Cl2]
(b) [Ni(en)(NH3)4]2+
(c) [Ni(C2O4)(en)2]2–
(d) [Cr(SCN)2(NH3)4]+
Answer : D
Question. Which complex compound will give four isomers?
(a) [Fe(en)3]Cl3
(b) [Co(en)2Cl2]Cl
(c) [Fe(PPh3)3NH3ClBr]Cl
(d) [Co(PPh3)3Cl]Cl3
Answer : C
Question. The total number of possible isomers for the complex compound [CuII(NH3)4][PtIICl4] are
(a) 5
(b) 6
(c) 3
(d) 4
Answer : D
Question. The number of geometrical isomers of the complex [Co(NO2)3(NH3)3] is
(a) 4
(b) 0
(c) 2
(d) 3
Answer : C
Question. The crystal field stabilisation energy (CFSE) for [CoCl6]4– is 18000 cm–1. The CFSE for [CoCl4]2– will be
(a) 6000 cm–1
(b) 16000 cm–1
(c) 18000 cm–1
(d) 8000 cm–1
Answer : D
Question. The oxidation state of cobalt in the following comples is [Co(NH3)4Cl2]Cl:
(a) +1
(b) +2
(c) +3
(d) 0
Answer : C
Question. The IUPAC name for [Pt(NH3)3(Br)(NO2)(Cl)]Cl is
(a) triamminechlorobromonitroplatinum(IV) chloride
(b) triamminebromochloronitroplatinum(IV) chloride
(c) triaminenitrochlorobromoplatinum(IV) chloride
(d) triamminechloronitrobromoplatinum(IV) chloride
Answer : C
Question. Ethylene diamine is an example of a ………. ligand :
(a) monodentate
(b) bidentate
(c) tridentate
(d) hexadentate
Answer : C
Question.The complex [Pt(NH3)4]2+ has ….. structure :
(a) square planar
(b) tetrahedral
(c) pyramidal
(d) pentagonal
Answer : A
Question.The number of unpaired electrons in d6, low spin, octahedral complex is :
(a) 4
(b) 2
(c) 1
(d) 0
Answer : D
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