MCQ Questions for Class 12 Chemistry Chapter 9 Coordination Compounds with Answers
Question 1.
K2[Fe(CN)6] is a/an
(a) double salt
(b) complex salt
(c) acid
(d) base
Answer
Answer: (b) complex salt
Question 2.
Which of the following compounds has tetrahedral geometry?
(a) [Ni(CN)4]2-
(b) [Pd(CN)4]2-
(c [PdCl4]2-
(d) [NiCl4]2-
Answer
Answer: (d) [NiCl4]2-
Question 3.
The number of possible isomers for the complex
|Co(C2O4)2 (NH3)2|
(a) 1
(b) 2
(c) 3
(d) 4
Answer
Answer: (b) 2
Question 4.
The oxidation state of nickel in |(Ni(CO4)| is
(a) 1
(b) 4
(c) 2
(d) 3
Answer
Answer: (b) 4
Question 5.
According to Werner’s theory of coordination compounds
(a) Primary valency is ion isable
(b) Secondary valency is ionisable
(c) Primary and secondary valencies are lonisable
(d) Neither primary nor secondary valency ¡s ionisable
Answer
Answer: (a) Primary valency is ion isable
Question 6.
Ammonia acts as a very good ligand but ammonium ion does not form complexes because
(a) NH3 isa gas while NH\(_{4}^{+}\) is in liquid form.
(b) NH3 undergoes sp3 hybridisatiort while NH\(_{4}^{+}\) undergoes sp3 d hybndisation
(c) NH\(_{4}^{+}\) ion does not have any lone pair of electrons
(d) NH\(_{4}^{+}\) ion has one unpaired electron while NH3 has two unpaired electrons
Answer
Answer: (c) NH\(_{4}^{+}\) ion does not have any lone pair of electrons
Question 7.
The ligand N(CH2CH2NH2) is
(a) bidentate
(b) tridentate
(c) tetradentate
(d) pentadentate
Answer
Answer: (c) tetradentate
Question 8.
Which of the following is a tridentate ligand?
(a) EDTA4+
(b) (COO)\(_{2}^{2-}\)
(c) dien
(d) NO\(_{2}^{-}\)
Answer
Answer: (c) dien
Question 9.
Among the following which arc ambidentate ligands?
(i) SCN–
(ii) NO\(_{3}^{-}\)
(iii) NO\(_{2}^{-}\)
(iv) C2O\(_{4}^{2-}\)
(a) (i) and (iii)
(b) (i) and (iv)
(c) (ii) and (iii)
(d) (ii) and (iv)
Answer
Answer: (a) (i) and (iii)
Question 10.
Which of the following ligands form a chelate?
(a) Acetate
(b) Oxalate
(c) Cyanide
(d) Ammonia
Answer
Answer: (b) Oxalate
Question 11.
Which of the following is not a neutral ligand?
(a) H2O
(b) NH3
(c) ONO
(d) CO2
Answer
Answer: (c) ONO
Question 12.
Which of the following ligands will not show chelation?
(a) EDTA
(b) DMG
(c) Ethene-1, 2-diamine
(d) SCN–
Answer
Answer: (d) SCN–
Question 13.
The complex ion which has no d-electrons in the central metal atom is
(a) [MnO4]–
(b) [Co(NH3)6]3-
(c) [Fe(CN)6]3-
(d) [Cr(H2O)6]3+
Answer
Answer: (a) [MnO4]–
Question 14.
The correct IUPAC name of the coordination compound K3|Fe(CN)5NO| is
(a) Potassium pentacyanonitrosylferrate (II)
(b) Potassium pentacyanonitroferrate (II)
(c) Potassium nitritopentacyanoferrate (IV)
(d) Potassium nitritepentacynanoiron (II)
Answer
Answer: (a) Potassium pentacyanonitrosylferrate (II)
Question 15.
The correct IUPAC name of the following compound is |Cr(NH3)5(NCS)||ZnCl4|
(a) Penta amine isothiocyanato chromium (III) tetrachlorozincate (II)
(b) Penta amine isothicocyanatezinc chloridechromate (III)
(c) Penta amine isothicoyanato chromate (II)
(d) isothiocyanatopenta amine chromium (II) zinc chloride (IV)
Answer
Answer: (a) Penta amine isothiocyanato chromium (III) tetrachlorozincate (II)
Question 16.
Correct formulae of tetraaminechloronitroplatinum (IV) sulphate can be written as
(a) [Pt(NH3)4 (ONO) Cl]SO4
(b) [Pt(NH3)4Cl2NO2]2
(c) [Pt(NH3)4 (NO2) Cl]SO4
(d) [PtCl(ONO)NH3(SO4)]
Answer
Answer: (c) [Pt(NH3)4 (NO2) Cl]SO4
Question 17.
Which of the following isomers will give white precipitate with BaCl2 solution?
(a) [CO(NH3)5SO4]Br
(b) [CO(NH3)5Br]SO4
(c) [CO(NH3)4(SO4)2]Br
(d) [CO(NH3)4(SO4)]
Answer
Answer: (c) [CO(NH3)4(SO4)2]Br
Question 18.
|Pt(NH3)4| |CuCl4| and |Cu(NH3)4||PtCl4| are known as
(a) ionisation isomers.
(b) coordination isomers
(c) linkage isomers
(d) polymerisation isomers
Answer
Answer: (b) coordination isomers
Question 19.
The name of the linkage isomer of |C0(NH3)5NO2|Cl2 will be
(a) pentaammonotrocobalt (II) chloride
(b) pentaaminenitrochloridecobaltate (III)
(c) pentaamminenitritocobalt (III) chloride
(d) pentanitrosoamminechlorocobaltate(III)
Answer
Answer: (c) pentaamminenitritocobalt (III) chloride
Question 20.
Which of the following complex species is not expected to exhibit optical isomerism?
(a) [Co(en) (NH3)2Cl2]+
(b) [Co(en)3]3+
(c)[Co(en)2Cl2]
(d) [Co(NH3)3Cl3]
Answer
Answer: (d) [Co(NH3)3Cl3]
Question 21.
Which of the following compounds exhibits linkage isomerism?
(a) [Co(en)3]Cl3
(b) [Co(NH3)6] [Cr(en)3]
(c) [Co(en)2(NO2)CI]Br
(d) [Co(NH3)5CI]Br2
Answer
Answer: (c) [Co(en)2(NO2)CI]Br
Question 22.
Which of the following will not show geometrical isomerism?
(a) [Cr(NH3)4Cl2]Cl
(b) [Co(en)2Cl2]Cl
(c) [(Co(NH3)5NO2]Cl2
(d) [Pt(NH3)2Cl2]
Answer
Answer: (c) (Co(NH3)5NO2]Cl2
Question 23.
Which of the following shows maximum number of isomers?
(a) [Cr(NH3)4Cl2]
(b) [Ni(en)NH3]2+
(c) [Ni(C2O4] (en)2]2+
(d) [Cr(SCN)2(NH3)4]+
Answer
Answer: (d) [Cr(SCN)2(NH3)4]+
Question 24.
For the square planar complex |Mabcd| where M is the central atom and a, b. c, d are monodentate ligands, the number of possible geometrical isomers are
(a) 1
(b) 2
(c) 3
(d) 4
Answer
Answer: (c) 3
Question 25.
The hybridisation involved in [Co(C2O4)3]3- is
(a) sp3d2
(b) sp3d3
(c) dsp3
(d) d2sp3
Answer
Answer: (d) d2sp3
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