Co-ordination Compounds – 2

1) Nitroglycerine is absorbed in porous dried clay called Kieselguhr and commercially used as a controlled explosive called.
a) Gun powder
b) T.N.T
c) Dynamite
d) Napalm

2) In compounds having coordination number 4, two principal geometries encountered are
a) Linear & bent
b) Trigonal planar and trigonal pyramidal
c) Cis form and trans form
d) Tetrahedral and square planar

3) The ion which exhibits a green colour is
a)
b)
c)
d)

4) Lanthanides form complexes with
a) Monodentate ligands
b) Bidentate ligands
c) Chelating agents
d) Simple anions

5) The Effective Atomic Number of Cu in [Cu(SCN)6]3- is
a) 35
b) 38
c) 34
d) 37

6) The co-ordination number and oxidation state of Al in the complex [Al(H2O)4(OH)2] are respectively
a) 5, +3
b) 6, +3
c) 6, +2
d) 4, +4

7) The co-ordination number and oxidation state of Cr in K3Cr(C2O4)3 are respectively
a) 4 and +2
b) 6 and +3
c) 3 and +3
d) 3 and 0

8) The complex compound of nickel in which Ni is in dsp2 hybridised state is
a)
b)
c)
d) None of these

9) Which of the following is an example of dsp2 hybridisation?
a)
b)
c)
d)

10) The total number of isomers for the complex compound [CuII(NH3)4] [PtIICl4] is
a) 4
b) 3
c) 6
d) 5

11) A co-ordination complex compound of cobalt has a molecular formula containing five ammonia molecules, one nitro group and two chlorine atoms for one cobalt atom. One mole of this compound produces three mole ions in an aqueous solution. On reacting this solution with excess of silver nitrate solution, two moles of AgCl are precipitated. The ionic formula of this compound would be
a)
b)
c)
d)

12) The geometry of Ni(CO)4 and Ni(PPH3)2Cl2 are
a) Both square planar
b) Tetrahedral and square planar respectively
c) Both tetrahedral
d) Square planar and tetrahedral respectively

13) Which is not a bonded complex?
a)
b) Ferrocene
c) Dibenzene chromium
d) Tetraethyl lead

14) Which is paramagnetic?
a)
b)
c)
d)

15) The formula dichlorobis (urea) copper (II) is.
a)
b)
c)
d)

16) Which of the following has a square planar structure?
a)
b)
c)
d) All of these

17) In which of the following compounds does the central metal atom obey the EAN  rule?
a) All
b)
c)
d)

18) Which of the following is paramagnetic?
a)
b)
c)
d)

19) Which of the following is an organometallic compound?
a)
b)
c)
d)

20) Which of the following is an organo metallic compound?
a) Lithium methoxide
b) Lithium acetate
c) Lithium dimethyl amide
d) Methyl lithium

21) The number of enantiomers of the compound CH3CHBrCHBr – CH3 is
a) 0
b) 1
c) 3
d) 4

22) Which of the following are organometallic compounds ?
a)
b)
c)
d) Both (b) and (c)

23) The number of geometrical isomers from [Co(NH3)3 (NO2)3] is
a) 2
b) 3
c) 4
d) None

24) Which of the following compounds is not coloured?
a)
b)
c)
d)

25) The unpaired electrons in Ni(CO)4 are
a) Zero
b) One
c) Three
d) Four

26) Which of the following complex will show geometrical as well as optical isomerism [En = ethylene diamine] ?
a)
b)
c)
d)

27) The oxidation state of Fe in the brown complex, Fe[(H2O)5NO]SO4 is
a) + 1
b) + 2
c) + 3
d) + 4

28) Among [Ni(CN)4]2-, [NiCl4]2- and [Ni(CO)4]
a)
b)
c)
d) None

29) The EAN of platinum in potassium hexachloroplatinate (IV) is
a) 46
b) 86
c) 36
d) 84

30) The EAN of Ni in K2[Ni(CN)4] is
a) 35
b) 34
c) 36
d) 38

31) The hybridisation of Fe in K4[Fe(CN)6] complex is
a)
b)
c)
d)

32) The [Cr(NH3)6]3+ ion is
a) Paramagnetic
b) Diamagnetic
c) Square planar
d) Tetrahedral

33) The oxidation number of Fe in K4[Fe(CN)6] is
a) +3
b) +2
c) +1
d) -3

34) Among [Ni(CO)4], [Ni(CN)4]2- and [Ni(Cl)4]2- ,
a)
b)
c)
d)

35) The number of ions formed in aqueous solution by the compound  [Co(NH3)4Cl2]Cl is
a) 2
b) 3
c) 4
d) None

36) The co-ordination number of Co in [Co(NH3)6]2+ is
a) 4
b) 6
c) 5
d) 8

37) The charge on cobalt in [Co(CN)6]3- is
a) -6
b) +3
c) -3
d) +6

38) The number of isomers possible for the square planar complex K2[PdClBr2SCN] is
a) 2
b) 3
c) 4
d) 5

39) Geometrical isomerism is found in co-ordination compounds having the co-ordination number
a) 2
b) 3
c) 4 (Tetrahedral)
d) 6

40) The shape of the complex Ag(NH3)+2 is
a) Octahedral
b) Square planar
c) Tetrahedral
d) Linear

41) A square planar complex is represented as
a) Geometrical isomers
b) Optical isomers
c) Linkage isomers
d) None

42) Which of the following is non-ionisable?
a)
b)
c)
d)

43) In which of the following complexes is the oxidation state of metal zero?
a)
b)
c)
d)

44) Which of the following complexes shows ionisation isomerism?
a)
b)
c)
d)

45) The IUPAC name of K3[Fe(CN)6] is
a) Potassium ferrocyanide
b) Potassium hexaferrocynate
c) Potassium hexaferrocynate (II)
d) Potassium hexacyanoferrate (III)

46) Which among the following ions has the highest paramagnetism?
a)
b)
c)
d)

47) The number of d-electrons in [Cr(H2O)6]3+ is
a) 2
b) 3
c) 4
d) 5

48) Which one of the following shows the maximum paramagnetic behaviour?
a)
b)
c)
d)

49) Which type of isomerism is shown by the complex compounds [Co(NH3)5Br]SO4 and [Co(NH3)5SO4]Br ?
a) Ionic
b) Linkage
c) Co-ordinate
d) Optical

50) The effective atomic number of Cr (Z = 24) in [Cr(NH3)6]Cl3 is
a) 35
b) 27
c) 33
d) 36

51) The fraction of chlorine precipitated by AgNO3 solution from [Cu(NH3)5Cl]Cl2 is
a) 1/2
b) 2/3
c) 1/3
d) 1/4

52) K3CoF6 is a high spin complex. What is the hybrid state of the Co atom in this complex?
a)
b)
c)
d)

53) Nickel has the highest oxidation state in
a)
b)
c)
d)

54) [(C6H5)2Pd(SCN)2] and [(C6H5)2 Pd (NCS)2] are
a) Linkage isomers
b) Co-ordination isomers
c) lonisation isomers
d) Geometrical isomers

55) Which of the following compounds would exhibit co-ordination isomerism?
a)
b)
c)
d)

56) Hexachloro cobaltate (III) ion is found to be a high spin complex. The hybridisation of cobalt in it is
a)
b)
c)
d)

57) The type of isomerism shown by [Co (en) 2(NCS) 2] Cl and  [Co(en)2(NCS)Cl]NCS
a) Co-ordinate
b) lonisation
c) Linkage
d) All the above

58) Hexafluoro ferrate (III) ion is an outer orbital complex. The number of unpaired electrons present in it is
a) 1
b) 3
c) 4
d) 5

59) [Fe(CN)6]4- ion is
a) Octahedral
b) Square planar
c) Bipyramidal
d) Tetrahedron

60) The central ion and ligand in the complex K2[Cd(CN)4] are respectively
a)
b)
c)
d)

61) A complex of platinum, ammonia and chlorine produces 4 ions per molecule in the solution. The structure of the complex may be
a)
b)
c)
d)

62) The possible number of isomers for the complex [MCl2Br2]SO4 is
a) 1
b) 2
c) 4
d) 5

63) The oxidation number of Pt in [Pt(C2H4)Cl3] is
a) + 1
b) + 2
c) + 3
d) + 4

64) The number of electrons gained by Pd in [PdCl4]2- is
a) 8
b) 4
c) 10
d) Zero

65) Which type of isomerism is exhibited by [Co(NH3)4Cl2]NO2 and [Co(NH3)4ClNO2]Cl ?
a) Geometrical
b) Optical
c) Linkage
d) lonisation

66) Which complex has square planar structure?
a)
b)
c)
d)

67) The co-ordination number of copper in cuprammonium sulphate is
a) 2
b) 4
c) 3
d) 6

68) Which one of the following is not expected to show paramagnetism?
a)
b)
c)
d)

69) The oxidation number of Fe in the compound Na4[Fe(CN)5NO]SO4.2H2O is
a) 0
b) + 1
c) + 2
d) + 3

70) In triethylenediamine cobalt (III) chloride, the co-ordination number of cobalt is
a) 3
b) 4
c) 6
d) 7

71) The number of geometrical isomers of [Co(NH3)3(NO2)3] are
a) 0
b) 2
c) 3
d) 4

72) Which exhibits higher molar conductivity?
a)
b)
c)
d)

73) The EAN of Cr in [Cr(SCN)6]3- is
a) 35
b) 33
c) 34
d) 37

74) Which ligand is capable of forming low spin as well as high spin complexes?
a) CO
b)
c)
d)

75) In which of the following ions does the metal atom have an EAN = 36?
a)
b)
c)
d)

76) The complex that violates the EAN is
a) potassium ferrocyanide
b) potassium ferricyanide
c) Nickel carbonyl
d) Cobalt (III) hexaammine chloride

77) The IUPAC name of Pt(NH3)5(Br)(NO2)Cl]Cl is
a) Triaminechlorobromonitroplatinium (IV) chloride
b) Triaminebromonitrochloroplatinium (IV) chloride
c) Triaminebromochloronitroplatinium (IV) chloride
d) Triaminenitrochlorobromoplatinium (IV) chloride

78) Which of the following is a high spin complex?
a)
b)
c)
d) All the above

79) The number of ions formed when copper ammonium sulphate is dissolved in water is
a) 1
b) 2
c) 4
d) 3

80) The oxidation state of Mn in its oxo-complex species [Mo2O4(C2H4)2 (H2O)2]2- is
a) + 2
b) + 3
c) +4
d) + 5

81) The co-ordination number of copper in the complex formed by adding excess of NH3 to CuSO4 solution is.
a) 4
b) 2
c) 6
d) 5

82) The compound [Co(NO2)(NH3)5]Cl2 and [Co (ONO)(NH3)5]Cl2 are examples of
a) Geometrical isomers
b) Linkage isomers
c) Ligand isomers
d) lonisation isomers

83) The complex ion [Cu(NH3)4]2+ has a
a) Tetrahedral configuration with one unpaired electron configuration
b) Square planar configuration with one unpaired electron
c) Tetrahedral configuration with all electrons paired
d) Square planar configuration with all electrons paired

84) Cis-trans isomerism is found in square planar complexes of the molecular formula (a and b are the monodentate ligands)
a)
b)
c)
d)

85) Transition elements form complexes readily because of the
a) Same size of cation
b) Vacant d-orbitals
c) Large ionic charge
d) All

86) The structure of iron pentacarbonyl is
a) Square planar
b) Trigonal bipyramid
c) Triangular
d) None

87) The groups satisfying the secondary valencies of a cation in a complex are called
a) Ligands
b) Radicals
c) Primary valencies
d) None

88) The co-ordination number of Fe in K3[Fe(CN)6] is
a) 2
b) 3
c) 4
d) 6

89) AgO in Ag (II) complex is
a) Diamagnetic
b) Paramagnetic
c) Ferromagnetic
d) None

90) The complex forming tendency increases with the
a) Increase in size of the cation
b) Decrease in size of the cation
c) Increase in size of the anion
d) None

91) Which statement is not correct?
a)
b) Carbonyl complexes are usually formed with transition metals
c) All transition metals form monometallic carbonyls
d)

92) In [Cr(NH3)4Cl2]Cl the ligands are
a)
b)
c)
d)

93) Which ligand is expected to be bidentate?
a)
b)
c)
d)

94) Which will give a white precipitate with AgNO3 in aqueous solution?
a)
b)
c)
d)

95) The structure of the [Cu(H2O)4]2+ ion is
a) Square planar
b) Tetrahedral
c) Octahedral
d) Distorted rectangle

96) The two compounds sulphatopentamine cobalt (III) bromide and sulphato pentamine cobalt (III) chloride represent
a) Linkage isomerism
b) lonisation isomerism
c) Co-ordination isomerism
d) No isomerism

97) [Co(NH3)4Cl2] possesses
a) Square planar geometry
b) Tetrahedral geometry
c) Octahedral geometry
d) None

98) The tendency of the transition metals to form complexes is not explained by the
a) Small size of the metal ion
b) Large ionic or nuclear charge
c) Low basicity of metal ions
d) Non-availability of d-orbitals

99) The oxidation state of Fe in Na3[Fe(NH3)(CN)5]2H2O is
a) – 1
b) + 1
c) + 2
d) 3

100) Which is a colourless complex?
a)
b)
c)
d)


Answer

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