JEE Questions for Chemistry Coordination Compounds Quiz 4 - MCQExams.com

Maximum value of paramagnetism is shown by
  • [Fe(CN)6]3-
  • [Cr(CN)6 ]3-
  • [Co(CN)6]3-
  • [ Sc(CN)6]3-
Geometrical shapes of the complexes formed by the reaction of Ni2+ with Cl- , CN- and H2O, respectively, are
  • octahedral, tetrahedral and square planar
  • tetrahedral, square planar and octahedral
  • square planar, tetrahedral and octahedral
  • octahedral, square planar and octahedral
Which of the following facts about the complex [Cr(NH3)6]Cl3 is wrong?
  • The complex involves d 2 sp3 hybridisation and is octahedral in shape
  • The complex is paramagnetic
  • The complex is an outer orbital complex
  • The complex gives white precipitate with silver nitrate solution
The magnetic moment (spin only) of [NiCl4 ]2- is
  • 1.82 BM
  • 5.46 BM
  • 2.82 BM
  • 1.41 BM
The complex showing a spin-only magnetic moment of 2.82 BM is
  • Ni(CO)4
  • [NiCl4]2-
  • Ni(PPh3)4
  • [Ni(CN)4]2-
Which one of the following is wrongly matched
  • [Cu(NH3 )4]2+ - Square planar
  • [Ni(CO)4] - Neutral ligand
  • [Fe(CN6 )]3- - sp3d 2
  • [Co(en)3]3+ - Follows EAN rule
[Sc(H2O)6]3+ ion is
  • colourless and diamagnetic
  • coloured and octahedral
  • colourless and paramagnetic
  • coloured and paramagnetic
In spectrochemical series chlorine is above than water, i.e., Cl > H2O, this is due to
  • good π-acceptor properties of Cl
  • strong σ-donor and good π-acceptor properties of Cl
  • good π-donor properties of Cl
  • larger size of Cl than H2O
Which of the following species will be diamagnetic ?
  • [Fe(CN)6]4-
  • [FeF6]3-
  • [Co(C2 O4)3]3-
  • [CoF6]3-
Which complex compound possesses sp3 d 2 hybridisation?
  • [Fe(NH3)6]3+
  • [Fe(CN)6]4-
  • [Fe(CN)6]3-
  • [Fe(Cl)6]3-
In which of the following octahedral complexes of Co (atomic numberwill be magnitude of ∆O be the highest?
  • [Co(CN)6]3-
  • [Co(C2 O4)3 ]3-
  • [Co(H2O)6]3+
  • [Co(NH3)6]3+
The number of unpaired electrons calculated in [Co(NH3)6 ]3+ and [Co(F6 )]3- are
  • 4 and 4
  • 0 and 2
  • 2 and 4
  • 0 and 4
An octahedral complex is formed when hybrid orbitals of the following type are involved
  • sp3
  • dsp2
  • d 2sp3
  • sp2d 2
Which of the following shell, form only an outer octahedral complex ?
  • d 4
  • d 8
  • d 6
  • None of these
[Ni(CN)4 ]2- , [MnBr4 ]2- and [CoF6 ]3- , geometry, hybridisation and magnetic moment of the ions respectively, are
  • tetrahedral, square planar, octahedral : sp3 , dsp2 , sp3 d 2 : 5.9, 0, 4.9
  • tetrahedral, square planar, octahedral : dsp2 , sp3 , sp3 d 2 : 0, 5.9, 4.9
  • square planar, tetrahedral, octahedral : dsp2, sp3 , d 2 sp3: 5.9, 4.9, 0
  • square planar, tetrahedral, octahedral : dsp2 , sp3 , sp3d 2 : 0, 5.9, 4.9
The reaction, [Fe(CNS)6 ]3- → [FeF6 ]3- takes place with
  • decrease in magnetic moment
  • increase in magnetic moment
  • decrease in coordination number
  • increase in coordination number
The number of unpaired electrons in the square planar [Pt(CN)4 ]2- ion is
  • 2
  • 1
  • 0
  • 3
Which has maximum paramagnetic character ?
  • [Fe(CN)6]4-
  • [Cu(H2O)4]2+
  • [Cu(NH3 )4]2+
  • [Mn(H2O)6]2+
In which of the following complex ion, the central metal ion is in a state of sp3 d 2 hybridisation ?
  • [CoF6)]3-
  • [Co(NH3)6]3+
  • [Fe(CN)6]3-
  • [Cr(NH3)6]3+
Which one of the following has a square planar geometry ?
(Atomic Number of Fe = 26, Co = 27, Ni = 28, Pt = 78)
  • [CoCl4]2-
  • [FeCl4]2-
  • [NiCl4]2-
  • [PtCl4]2-
Which of the following complex has zero magnetic moment (spin only) ?
  • [Ni(NH3)6]Cl2
  • Na3[FeF6]
  • [Cr(H2O)6]SO4
  • K4[Fe(CN)6]
CN- is 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
Considering H2O as weak field ligand, the number of unpaired electrons in [Mn(H2O )6]2+ will be
(Atomic number of Mn =
  • three
  • five
  • two
  • four
The geometry of Ni(CO)4 and Ni(PPh3 )2 Cl2 are
  • both square planar
  • tetrahedral and square planar respectively
  • both tetrahedral
  • square planar and tetrahedral respectively
The magnetic moment of [Co(NH3 )6 ]Cl3 is
  • 1.73
  • 2.83
  • 6.6
  • zero
Hybridisation, shape and magnetic moment of [Ni(CN)4]2- ion
  • dsp2, square planar, zero
  • dsp2, square planar, 1.73
  • sp3d 2 , octahedral, zero
  • d 2 sp3 , octahedral, 1.73
Excited state configuration of Mn2+ is

  • Chemistry-Coordination Compounds-3106.png
  • 2)
    Chemistry-Coordination Compounds-3107.png

  • Chemistry-Coordination Compounds-3108.png

  • Chemistry-Coordination Compounds-3109.png
Potassium ferrocyanide is an example of
  • tetrahedral
  • octahedral
  • square planar
  • linear
The number of unpaired electrons in Ni(CO)4 is
  • 0
  • 1
  • 3
  • 4
Which one of the following shows maximum value of paramagnetic behaviour ?
  • [Sc(CN)6]3-
  • [Co(CN)6]3-
  • [Ni(CN)4]2-
  • [Cr(CN)6]3-
0:0:1


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