Coordination Compounds Test

Directions For Questions

The crystal field theory (C.F.T.) is now much more widely accepted than the valence bond theory. It assume that the attraction between the central metal and the ligands in a complex is purely electrostatic. According to C.F.T. ligands are treated as a point charge and crystal field splitting energy (CFSE) increases the thermodynamic stability of the complexes. Value of CFSE depends upon nature of ligand and a spectrochemical series has been made experimentally. For tetrahedral complexes, $$\Delta$$ is about 4/9 times to $$\Delta _{0}$$ (CFSE for octahedral complexes.) This energy lies in visible region and i.e. why electronic transition are responsible for colour.

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$$\displaystyle Ti^{3+}\left ( aq \right )$$ is violet while $$\displaystyle Ti^{4+}\left ( aq \right )$$ is colourless because $$\displaystyle -$$

There energy difference between $$\displaystyle t_{2g}$$ and $$\displaystyle e_{g}$$ of $$\displaystyle Ti^{4+}$$ is quite high and does not fall in the visible region.

Coordination Co...

Question 1

There is no crystal field effect in $$\displaystyle Ti^{4+}$$

There energy difference between $$\displaystyle t_{2g}$$ and $$\displaystyle e_{g}$$ of $$\displaystyle Ti^{4+}$$ is quite high and does not fall in the visible region.

$$\displaystyle Ti^{4+}$$ has $$\displaystyle d^{0}$$ configuration.

$$\displaystyle Ti^{4+}$$ is very small in comparison to $$\displaystyle Ti^{3+}$$ and hance does not absorb any radiation.

Question 2

Sodium amminechlorobromonitro-N-platinum(II)

Sodium nitrochlorobromoammine-N-platinate(II)

Sodium amminebromochloronitro-N-platinate(II)

Sodium amminebromochloronitro-N-platinum(II)

Question 3

Question 4

diamminechloro(methylamine)platinum(II)chloride

(dimethylamine)chlorodiamminoplatinum(II)chloride

bis(ammine)chloro(methylamine)platinate(II)chloride

diaminechloro(mehylamine)platinum(II)chloride

Question 5

coordination isomerism.

linkage isomerism.

ionization isomerism.

both coordination and linkage isomerism.

Question 6

$$Cis-[PtCl_{2}(NH_{3})_{2}]$$

$$Trans-[PtCl_{2}(NH_{3})]$$

$$[Pt(NH_{3})_{4}]^{2+}$$

$$[PtCl_{4}]^{2-}$$

Question 7

1:1:1:1

1:2:2:3

2:1:2:3

3:2:2:1

Question 8

Geometrical and ionization

Geometrical and optical

Optical and ionization

Geometrical only

Question 9

Carboxypeptidase-A is an enzyme and contains zinc

Haemoglobin is the red pigment of blood and contains iron

Cyanocobalamin is $$B^{12}$$ and contains cobalt

Chlorophylls are green pigments in plants and contain calcium

Question 10

Linkage isomerism

Ionization isomerism

Coordination isomerism

No isomerism

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