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Coordination Compounds Quiz-4

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JEE Advanced is a high level exam that checks your concept by putting various types of questions. The questions are in a different format from JEE mains, herein the questions are : single correct multiple choice questions, multiple correct multiple choice questions, statement based questions and comprehension type questions..

Q1. 
Coordination number of calcium is six in
  •  [Ca(EDTA)]^(2-)
  •  CaC_2 O_4
  •  [Ca(C_2 O_4 )_2 ]^(2-)
  •  CaSO_4∙4H_2 O
Solution
(a) EDTA is hexadentate

Q2. 
Which has aromatic ring in complex
  •  DNG in dimethyl glyoximate
  •  Cyclopenta-dienyl anion in ferrocene
  •  Both (a) and (b)
  •  None of the above
Solution
(b)

Q3. If ∆_0 and ∆_t represent crystal field splitting energies for d-orbitals for octahedral and tetrahedral geometries respectively, then for d^6 (high spin in both cases) what are CFSE (ignore the pairing energy) respectively?
  •  0.6 ∆_0 and 0.6 ∆_t
  •  0.4 ∆_0and 0.6 ∆_t
  •  0.6 ∆_0and 0.6 ∆_t
  •  0.6 ∆_0and 0.4 ∆_t
Solution
(c)


Q4. Total number of geometrical isomers for the complex [RhCl(CO)(PPh_3)(NH_2)] is
  •  1
  •  2
  •  3
  •  4
Solution
(c) [M (abcd)] complex is square planar so will have three geometrical isomers.

Q5.Spin only magnetic moment of the compound Hg[Co(SCN)_4]is
  •  √3
  •  √3
  •  √24
  •  √8
Solution
(b)

Q6. Of the following complex ions, one is a Bronsted-Lowry acid That one is
  •  [Cu(NH_3 )_4 ]^(2+)
  •  [FeCl_4 ]^-
  • [Fe(H_2 O)_6 ]^(3+)
  •  [Zn(OH)_4 ]^(2-)
Solution
(c)

Q7.Select the correct statement
  •  Complex ion [MoCl_6 ]^(3-) is paramagnetic
  •  Complex ion [Co(en)_3 ]^(3+) is diamagnetic
  •  Both (a) and (b) are correct
  •  None of the above is correct
Solution
(c) Cl^- is a weak ligand hence [MoCl_6 ]^(3-) 〖sp〗^3 d^2hybridisation and with unpaired electrons is paramagnetic (en) is a strong ligand hence [Co(en)_3 ]^(3+)-d^2 sp^3 hybridization and with all paired electrons is diamagnetic

Q8.[Cr(NH_3 )_5 Br)Cl and [Cr(NH_3 )_5 Cl]Brcan be distinguished by / and isomerism shown is
  •  BaCl_2, ionization
  •  AgNO_3, ionization
  •  AgNO_3, coordinate
  •  BaCl_2,linkage
Solution
(b) Complexes differ in nature of lonisation

Q9.In the complex [CoCl_3∙4NH_3]
  •  Coordination entity is [Co(NH_3 )_4 Cl_2 ]^+
  •  Counter ion is Cl^-
  •  Both (a) and (b) correct
  •  None of the above is correct
Solution
(c)

Q10. The pair of compounds having metals in their highest oxidation state is
  •  MnO_2,FeCl_3
  •  [MnO_4 ]^-,CrO_2 Cl_2
  •  [MnO_4 ]^-,CrO_2 Cl_2
  • [NiCl_4 ]^(2-) ,[CoCl_4 ]^-
Solution
(b)
(a) In MnO_2,FeCl_3oxidation states of Mn and Fe are +4 and +3 respectively.
(b) In 〖(MnO_4)〗^-,CrO_2 Cl_2 oxidation states of Mn and Cr are +7 and +6 respectively.
(c) In [Fe(CN)_6 ]^(3-) ,[Co(CN)_3] oxidation states of Fe and Co are +3 and +3 respectively.
(d) [NiCl_4 ]^(2-) ,[CoCl_4 ]^- oxidation states of Ni and Co are +2 and +3 respectively.

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Coordination Compounds - Quiz 4
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