Coordination Compounds MCQs | Coordination Compounds Objective Type Questions and Answers

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Questions
21 Which one of the following statement is incorrect?
A Greater the formation of (Kf) of a complex ion, greater is its stability
B Greater the positive charge one the central metal ion, greater is the stability of the complex
C Greater is the basic character of the ligand, lesser is the stability of the complex
D Chelate complexes have high stability constants

Answer: Greater is the basic character of the ligand, lesser is the stability of the complex
22 Among the following ions which one has the highest paramagnetism
A [Cr(H2O)6]3+
B [Fe(H2O)6]2+
C [Cu(H2O)6]2+
D [Zn(H2O)6]2+

Answer: [Fe(H2O)6]2+
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23 Among the following, the compound that I both paramagnetic and coloured is
A K2Cr2O7
B (NH4)2[LiCl6]
C VOSO4
D K3[Cu(CN)4]

Answer: VOSO4
24 The magnetic moment of [NiX4]2– ion is found to be zero. Then the metal of the complex ion is (X = monodentate anionic ligand).
A sp3 hybridized
B spd2 hybridised
C dsp2 hybridized
D All of these

Answer: dsp2 hybridized
25 Which of the following complex shows ionization isomerism
A [Cr(NH3)6]Cl3
B [Cr(en)2]Cl2
C [Cr(en)3]Cl3
D [CoBr(NH3)5]SO4

Answer: [CoBr(NH3)5]SO4
26 The IUPAC name of Xe[PtF6] is
A Hexafluoridoplatinate (VI) xenon
B Xenol hexafluoridoplatinate (V)
C Xenon hexafluoridoplatinate (VI)
D None Of The Above

Answer: Xenol hexafluoridoplatinate (V)
27 The number of ions formed, when bis (ethane-1, 2-diamine)copper (II) sulpahte is dissolve in water will be:
A 1
B 2
C 3
D None Of The Above

Answer: 2
28 The ______ sphere is enclosed in brackets in formulas for complex species, and it includes the central metal ion plus the coordinated groups.
A ligand
B donor
C oxidation
D coordination

Answer: coordination
29 (Valance Bond Theory) Magnetic measurements indicate that [Co(OH2)6]2+ has 3 unpaired electrons. Therefore, the hybridization of the metal's orbitals in [Co(OH2)6]2+ is:
A sp3
B sp2d
C dsp2
D sp3d2

Answer: sp3d2
30 A molecule that cannot be superimposed on its mirror image is said to exhibit which of the following?
A geometrical isomerism
B optical isomerism
C linkage isomerism
D reactive isomerism

Answer: optical isomerism
31 (Crystal Field Theory) Consider the complex ion [Mn(OH2)6]2+ with 5 unpaired electrons. Which response includes all the following statements that are true, and no false statements? I. It is diamagnetic. II. It is a low spin complex. III. The metal ion is a d5 ion. IV. The ligands are weak field ligands. V. It is octahedral.
A I, II
B III, IV, V
C I, IV
D II, V

Answer: III, IV, V
32 (Crystal Field Theory) When the valence d orbitals of the central metal ion are split in energy in an octahedral ligand field, which orbitals are raised least in energy?
A dxy and dx2-y2
B dxy, dxz and dyz
C dxz and dyz
D None of the above

Answer: dxy, dxz and dyz

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