Co-ordination Compounds – 1

1) The composition of the brown ring complex formed during the detection of the nitrate ion is
a) [Fe(H2O)5 NO2] SO4
b) [Fe(H2O)5 NO]SO4
c) [Fe(H2O)5NO3]SO4
d) [Fe(H2O)5 NO3SO4

2) Which among the following is a bidentate ligand?
a) CO32-
b) SO4
c) -CN
d) none of the above

3) The number of six co-ordination complex compounds formed when PtCI4 reacts with NH3 is
a) 6
b) 5
c) 4
d) 3

4) In which of the following Metal Carbon bonds are both sigma and p bonds present together?
a) (C2H5)2 Zn
b) Fe -(h5 C2H5)2
c) Ni(CO)4
d) Grignards reagent

5) In tetra-ammine dichloro chromium(III) ions the charge carried by the complex ion is
a) 4
b) 3
c) 2
d) 1

6) In CoCl3. 6 NH3 if all the primary valencies are satisfied by chloride ions and all the secondary valencies by chloride ions and all the secondary valencies by NH3 molecules, the number of ions formed in solution will be
a) 6
b) 5
c) 4
d) 3

7) The ion which gives blood red colouration with Fe3+ ion is
a) CN
b) SCN
c) CNS
d) NO3

8) Which of the following is a square plaaer complex?
a) Ni(CN)42-
b) Ni(CO)4
c) NiCI42-
d) [Ni(H2O)6]2+

9) The IUPAC name of the complex K4[Fe(CN)6] is
a) potassium hexa cyano iron (II)
b) potassium hexa cyano iron(III)
c) tetra potassium hexa cyano iron(ii)
d) potassium hexa cyano ferrate(ii)

10) What is the co-ordination number of copper in CuSO4. 5H2O?
a) 2
b) 3
c) 4
d) 5

11) The isomerism exhibited by [Co(NH3)5NO2]2+ is
a) salt isomerism
b) co-ordination isomerism
c) hydration isomerism
d) hydration isomerism

12) The correct order of stability of the following complexes Cd CI42- (A), Cd Br42- (B) CdI42- (C) Cd (CN)62- (D) is
a) A > B > C > D
b) D > C > B > A
c) A < B = C > D
d) A= B = C < D

13) Wilkinson’s catalyst is
a) [Ni (NH3)6]2+
b) K [Pt CI3 C2H4]
c) [(Ph3P)3 Rh] CI
d) Ni (CO)4

14) Which of the following is an organo-metallic compound.?
a) carbide
b) cyanide
c) haemoglobin
d) none of the above

15) Which is not an organo metallic compound
a) (C2H5)2 Zn
b) (C3H7O) 4 Ti
c) C6H5Ti(OCH3)3
d) CH3-B (OCH3)2

16) Which of the following is a component of ruby ?
a)
b)
c)
d)

17) Which complex is expected to show optical activity?
a)
b)
c)
d)

18) Which complex is diamagnetic?
a)
b)
c)
d) None

19) For which transition metal ions are low spin complexes possible?
a)
b)
c)
d) All of these

20) Which will give Fe3+ ions in solution?
a)
b)
c)
d)

21) Which is the strongest field ligand?
a)
b)
c)
d) En

22) The IUPAC name of Na3[Co(ONO)6] is
a) Sodium cobaltinitrite.
b) Sodium hexanitritocobaltate (III)
c) Sodium hexanitrocobalt (III)
d) Sodium hexanitritocobaltate (II)

23) The IUPAC name of [Pt(NH3)4NO2Cl]SO4 is
a) Chloronitroplatinum (IV) sulphate
b) Tetramminechloronitritoplatinum (IV) sulphate
c) Chloronitrotetra-amine platinum (IV) sulphate
d) Platinum (IV) tetra-amine nitrochlorosulphate

24) [Co(NH3)6]Cl is called
a) Hexamine cobalt (III) chloride
b) Amino cobalt chloride (III)
c) Cobalt chloride hexamine
d) Hexamine tricobalt chloride

25) The correct IUPAC name of the complex.

 is
a) Dichlorodimethylglyoximato cobalt (II)
b) Bis (dimethylglyoxine) dichloro-cobalt (II)
c) Dimethylglyoxime cobalt (II) chloride
d) Dichloro dimethylglyoxime-N, N-cobalt (II)

26) The IUPAC name of K2[Zn(OH)4] is
a) potassium tetrahydroxy zinc (II)
b) potassium hydroxozinc (II)
c) potassium tetrahydroxy zincate (IV)
d) potassium hydroxozinc (II)

27) The IUPAC name of the compound [Cu(NH3)4](N03)2 is.
a) Cuprammonium nitrate
b) Tetraamine copper (II) dinitrate
c) Tetraamine copper (II) nitrate
d) Tetraamine copper (I) dinitrate

28) The IUPAC name of the complex Hg[Co(CNS)4] is
a) Mercury tetrathiocyanatocobaltate (II)
b) Mercury cobalt tetrasulphocyano (II)
c) Mercury tetrasulphocyanide cobaltate(II)
d) Mercury sulphocyanatocobalt (II)

29) The IUPAC name of the compound K3[Al(C204)3] is
a) potassium aluminooxalate (II)
b) potassium alumino (III) oxalate
c) potassium trioxalatoaluminate
d) potassium trioxalatoaluminate (III)

30) The IUPAC name of Fe(C5H5)2 is
a) Cyclopentadienyl iron (II)
b) Bis (cyclopentadienyl) iron (II)
c) Dicyclopentadienyl ferrate (II)
d) Ferrocene

31) The IUPAC name of Mn3(CO)12 is
a) Dodecacarbonyl manganate (0)
b) Dodecacarbonyl manganic (II)
c) Dodecacarbonyl trimanganese (0)
d) Manganic dodecacarbonyl (0)

32) The IUPAC name of [CoCl(NO2)(en)2]Cl is
a) Chloronitro bis (ethylene diamine) cobaltic (III) chloride
b) Chloronitro bis (ethylene diamine) cobalt (II) chloride
c) Chloro bis (ethylene diamine) nitrocobalt (III) chloride
d) None

33) The correct name of

 is
a)
b)
c)
d) Nonacarbonyl iron

34) Lithium tetrahydrido aluminate is correctly represented as
a)
b)
c)
d)

35) All answers @ Which of the following statements is not correct ?
a)
b)
c)
d) All are correct

36) All answers@ Which of the following statements is not correct ?
a)
b)
c)
d) All are correct

37) Which of the following statements is not correct ?
a)
b)
c)
d) All are correct

38) @ Which of the following statements is not correct ?
a)
b)
c)
d) All are correct

39) Which of the following statements is correct ?
a)
b)
c)
d) All are correct

40) In sodium tetrafluorooxochromate Na3[Cr(O)F4] the left out place should be filled with
a) III
b) VI
c) IV
d) None of these

41) Which of the following is paramagnetic ?
a) Potassium ferrocyanide
b) Potassium ferricyanide
c) Nickel carbonyl
d) Cobalt hexammine chloride

42) Fe3+ ions form a prussian blue coloured precipitate with potassium ferrocyanide due to the formation of
a)
b)
c)
d)

43) When [Co(NH3)6]Cl3 ionises in water, the number of ions produced is
a) 4
b) 6
c) 3
d) 2

44) Which of the following is the most likely structure of CrCl3.6H2O, if 1/3 of the total chlorine of the compound is precipitated by adding AgNO3 to its aqueous solution ?
a)
b)
c)
d)

45) Which one of the following has the highest number of unpaired electrons ?
a)
b)
c)
d)

46) Which one of the following square planar complexes will show cis-trans isomerism ?
a)
b)
c)
d) MABCD

47) For which of the following configurations can octahedral complexes exist in both high spin and low spin forms ?
a)
b)
c)
d)

48) Which one is a high spin or outer-orbital complex ?
a)
b)
c)
d)

49) Choose the species which can not act as a ligand to a transition metal ion.
a)
b)
c)
d)

50) Which one of the following statements is false ?
a)
b)
c)
d)

51) Which of the following is not a co-ordination compound ?
a) Potash alum
b) Potassium ferrocyanide
c) Cuprammonium sulphate
d) Potassium ferricyanide

52) The number of ions in tetramine copper (II) hydroxide is
a) 2
b) 3
c) 4
d) 7

53) What type of hybridisation is involved in Fe(CN)4-6 ?
a) sp
b)
c)
d)

54) The metal ion present in insulin is
a)
b)
c)
d)

55) Which of the following contains a non-transition metal ion ?
a) Haemoglobin
b) Chlorophyll
c) Insulin
d)

56) Which of the following compounds will exhibit co-ordination isomerism ?
a)
b)
c)
d) None of these

57) The number of geometrical isomers for [Pt(NH3)2Cl2] is
a) 2
b) 1
c) 3
d) 4

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

59) The blue complex formed on addition of conc. NH4OH to a Cu2+ salt solution has the structure
a)
b)
c)
d)

60) The colour of CuCr2O7 solution is water in green because
a)
b)
c) Both ions are green
d)

61) When CuSO4 solution is added to K4[Fe(CN)6] the formula of the product formed is
a)
b) KCN
c)
d)

62) Which type of isomerism is exhibited by [Co(NH3)5Br]SO4 and [Co(NH3)5SO4]Br ?
a) Hydrate isomerism
b) lonisation isomerism
c) Ligand isomerism
d) Co-ordination isomerism

63) Which of the following ions form the most stable complex compound ?
a)
b)
c)
d)

64) Geometrical isomerism is not possible in
a)
b)
c)
d) All

65) The hybridisation of the central atom in co-ordination compounds having octahedral, tetrahedral and square planar geometries are respectively
a)
b)
c)
d)

66) Which of the following pairs exhibits linkage isomerism ?
a)
b)
c)
d)

67) Which of the following is an example of co-ordination isomerism ?
a)
b)
c)
d)

68) The number of moles of AgCl precipitated by adding AgNO3 to one molar solution of complex [Pt(NH3)3Cl2Br]Cl is
a) 1
b) 0
c) 3
d) 4

69) The most stable complex among the following is
a)
b)
c)
d)

70) The oxidation state of the metal is zero in the complex ion
a)
b)
c)
d)

71) The number of isomeric forms in which [Co(NH3)4Cl2]+ ion can occur is
a) 2
b) 3
c) 4
d) 1

72) For which transition metal ions are low spin complexes possible?
a)
b)
c)
d) All are correct

73) Which ligand produces a high crystal field splitting (a strong ligand field) ?
a) CO
b)
c)
d) All are correct

74) Which one of the following has the largest value of crystal field splitting ?
a)
b)
c)
d)

75) CuSO4 solution reacts with excess of KCN solution to form
a)
b)
c)
d)

76) Name the metal M which is extracted on the basis of the reaction ?
4M + 8CN + 2H2O + O2® 4[M(CN)2] + 4OH

a) Ni
b) Ag
c) Cu
d) Hg

77) Which of the following is the most likely structure of CrO3.6H2O if 1/3 of the total chlorine of the compound is precipitated by adding AgNO3 to its aqueous solution ?
a)
b)
c)
d)

78) With which of the following general formulae are fac, mer isomerism associated ?
a)
b)
c) MABCD
d)

79) A square planar complex represented below will show


a) Geometrical isomerism
b) Optical isomerism
c) Linkage isomerism
d) No isomerism

80) Which of the following complexes can form d- and l-isomers ?
a)
b)
c)
d)

81) The complexes given below show.


a) Co-ordination isomerism
b) Geometrical isomerism
c) Optical isomerism
d) Bridged isomerism

82) Which of the following represents a hexadentate ligand ?
a) DMG
b) 2,2 bipyridyl
c) Ethylene diammine
d) None of these

83) The correct IUPAC name of AlCl3 (EtOH) is
a) Aluminium (II) chloride-4-ethanol
b) Aluminium (III) chloride-4-ethanol
c) Aluminium (IV) chloride-4-ethanol
d) Aluminium chloride-4-ethanol

84) The correct formula of Zeises salts is
a)
b)
c)
d)

85) The possible number of isomers for the complex [MCl2Br2]SO4 is
a) 2
b) 3
c) 5
d) 4

86) A complex MA3X3, where A and X are unidentate ligands may give
a) Two geometrical isomers
b) Three geometrical isomers
c) Two geometrical isomers which can be resolved into a pair of enantiomers
d) Two geometrical isomers one of which can be resolved into a pair of enantiomers

87) Fe2(CO)9 is diamagnetic. Which of the following reasons is correct?
a) The presence of one CO as bridge group
b) The presence of a monodentate ligand
c) The Fe-Fe bond in the molecule
d) the resonance hybridisation of CO

88) Which of the following metal forms a polynuclear carbonyl ?
a) Na
b) Mg
c) Mn
d) All

89) In the complex PtCl4.3NH3, the number of ionisable chlorines is
a) 4
b) 2
c) 3
d) 1

90) RRR Co-ordination compounds are the compounds in which the central metal atom is linked to atoms, ions or molecules by
a) Co-ordinate bonds
b) Covalent bonds
c) Both covalent and co-ordinate bonds
d) Ionic and covalent bonds

91) Co-ordination compounds are mostly formed by

a) s-Block elements
b) p-Block elements
c) d-Block elements
d) f-Block elements

92) Which of the following is a complex of a metal other than a transition metal ?
a) Haemoglobin
b) Chlorophyll
c) Ferrocene
d)

93) The metals present in chlorophyll, haemoglobin and vitamin B12 are respectively
a) Fe, Mg and Co
b) Mg, Fe and Co
c) Co, Mg and Fe
d) None of the above is correct

94) Which of the following statements is incorrect ?
a) Co-ordination compounds and complexes are synonymous terms
b) Complexes always give ions in solution
c) Complexes may give ions in solution or may not give ions in solution
d) Complex ion does not dissociate into its component parts even in solution

95) Which of the following is not a double salt but is a complex salt ?
a)
b)
c)
d)

96) The solution of the complex [Cu(NH3)4] SO4 in water
a)
b)
c)
d) Will not give the tests of any of the above species

97) Ligands are
a) Negative ions only
b) Neutral molecules only
c) Never positive ions
d) Negative or positive ions or neutral molecules.

98) EDTA is a
a) Bidentate ligand
b) Tetradentate ligand
c) Hexadentate ligand
d) Polydentate ligand

99) An element that is usually found in explosives is
a) Sulphur
b) Nitrogen
c) Carbon
d) Aluminium

100) BHC is a/an
a) Synthetic polymer
b) Insecticide
c) Fertilizer
d) Detergent


Answer

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