Quiz  /  Coordination Compounds Class 12 MCQ Questions With Answers

  • 1. 
    Co-ordination compounds have great importance in biological systems. In this context, which statement is incorrect ?

  • Carboxypeptidase A is an enzyme and contains zinc
  • Haemoglobin is the red pigment of blood and contains iron
  • Cyanocobalmin is B-12 and contains cobalt
  • Chlorophylls are green pigments in plants and contain calcium

  • 2. 
    The value of 'spin only' magnetic moment for one of the following configurations is 2.84 BM. The correct one is:

  • d4 (in strong field ligand in octahedral complexes)
  • d4 (in weak field ligand in octahedral complexes)
  • d3 (in weak as well as strong field ligand in octahedral complexes)
  • d5 (in strong field ligand in octahedral complexes)

  • 3. 
    The oxidation state of Cr in [Cr(NH3)4Cl2]+ is

  • +3
  • +2
  • +1
  • 0

  • 4. 
    The IUPAC name of the complex [Co (NH3)4 Cl2] Cl is

  • dichloro tetraammine cobalt (III) chloride
  • tetraammine dichloro cobalt (III) chloride
  • tetraammine dichloro cobalt (II) chloride
  • tetraammine dichloro cobalt (IV) chloride

  • 5. 
    The IUPAC name of K2 [Ni (CN)4] is

  • Potassium tetracyanatonickelate (II)
  • Potassium tetracyanonickelate (III)
  • Potassium tetracyanonickel (III)
  • Potassium tetracyanatonickel (II)

  • 6. 
    A complex compound in which the oxidation number of a metal is zero is

  • K4 [Fe (CN)6]
  • K3 [Fe (CN)6]
  • [Ni (CO)4]
  • [Pl (NH3 )4]Cl2

  • 7. 
    In the complex [E(en)2(C2O4)]NO2 (where (en) is ethylenediamine) _______are the coordination number and the oxidation state of the element ‘E’ respectively.

  • 6 and 2
  • 2 and 2
  • 4 and 3
  • 6 and 3

  • 8. 
    Cl as ligand results in

  • high spin complex
  • low spin complex
  • either high or low spin complex
  • None of the above

  • 9. 
    Which one is a neutral ligand?

  • H2O
  • NH3
  • CO
  • All of these

  • 10. 
    EAN (Effective Atomic Number) of a metal carbonyl M(CO)x is 36. If atomic number of metal M is 26, what is the value of x ?

  • 4
  • 8
  • 5
  • 6

  • 11. 
    Total number of possible isomers in [CoCl2 (en)2 ]Cl is

  • 2
  • 3
  • 4
  • 6

  • 12. 
    Which one of the following coordination compounds isused to inhibit the growth of tumours?

  • Trans-platin
  • EDTA complex of calcium
  • [(Ph3P)3RhCl]
  • Cis-platin

  • 13. 
    In the complex [Co(NH3)5Cl]Cl, the coordination number is

  • 3
  • 5
  • 6
  • 4

  • 14. 
    Which of the following compounds shows opticalisomerism?

  • [Co(CN)6 ]3-
  • [Cr(C2O4 )3 ]3-
  • [ZnCl4 ]2-
  • [Cu(NH3 )4 ]2+

  • 15. 
    Sp3d hybridisation results in which shape-

  • Tetrahedral
  • Square planar
  • Trigonal bipyramidal
  • Octahedral

  • 16. 
    The coordination entity of K2[NiCl4]

  • NiCl4
  • K2[NiCl4
  • [NiCl4]2-
  • Ni2+

  • 17. 
    Which of the following is the limitation of valence bondtheory?

  • It does not distinguish between weak and strongligands.
  • It does not give quantitative interpretation of magneticdata.
  • It does not explain the colour exhibited bycoordination compounds
  • All of these

  • 18. 
    The central metal ion of K4[Fe(CN)6]

  • Fe+
  • Fe2+
  • Fe3+
  • Fe4+

  • 19. 
    Which one is a cationic complex?

  • K3[Fe(CN)6]
  • Na2[Ni(EDTA)]
  • [Co(en)2Cl2]Cl
  • K3[Fe(CN)5NO]

  • 20. 
    Which of the following is the most stable complex species?

  • [Fe(CO)5]
  • [Fe(CN)6]3–
  • [Fe(C2O4)3]3–
  • [Fe(H2O)6]3+

  • 21. 
    Cobalamine, an essential vitamin is a coordination compound of

  • Al
  • Fe
  • Co
  • CO

  • 22. 
    CN– is a strong field ligand. This is due to the fact that

  • it carries negative charge
  • it is a pseudohalide
  • it can accept electrons from metal species
  • it forms high spin complexes with metal species

  • 23. 
    Which of the following options are correct for [Fe(CN)6 ]3-complex ?(i) Possess d2sp3 hybridisation(ii) Possess sp3d2 hybridisation(iii) It is paramagnetic(iv) It is diamagnetic

  • (i) and (iii)
  • (ii) and (iii)
  • (i) and (iv)
  • (ii) and (iv)

  • 24. 
    Ligands and central metal ions are respectively

  • lewis base and lewis acid
  • lewis acid and lewis base
  • both lewis base
  • both lewis acid

  • 25. 
    Pick out the odd one out.

  • CN-
  • Cl-
  • SO42-
  • C2O42-

  • 26. 
    According to the postulates of Werner for coordinationcompounds

  • primary valency is ionizable
  • secondary valency is ionizable
  • primary and secondary valencies are non-ionizable
  • only primary valency is non-ionizable

  • 27. 
    ∆o > P results in

  • low spin complex
  • high spin complex
  • none of the above
  • All of above

  • 28. 
    Coordination compounds play a vital role in

  • biological functions
  • catalytic applications
  • both a and b
  • none of these
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