Coordination Compounds Objective Type Questions and Answers

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

View Answer

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+

View Answer

Answer: [Fe(H2O)6]2+

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]

View Answer

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

View Answer

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

View Answer

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

View Answer

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

View Answer

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

View Answer

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

View Answer

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

View Answer

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

View Answer

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

View Answer