CBSE Class 12 Chemistry Coordination Compounds MCQs Set C

Question. Which of the following ligands is expected to be bidentate?
(a) CH₃NH₂
(b) CH₃C N
(c) Br
(d) C₂O₄^2-

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 [Cu^II(NH₃)₄][Pt^IICl₄] 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