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Chapter: 12th Chemistry : Coordination Chemistry
Coordination Chemistry: Important Questions
Answer
the following questions:
1. Write the IUPAC names
for the following complexes.
i) Na2 [Ni( EDTA)]
ii) [Ag (CN)2]
iii) [Co(en)3]2
(SO4)3
iv) [Co(ONO) (NH3)5]2+
v) [Pt(NH3)2
Cl(NO2)]
2. Write the formula for the following coordination compounds.
a) potassiumhexacyanidoferrate(II)
b) pentacarbonyliron(0)
c) pentaamminenitrito −κ −N -cobalt(III)ion
d) hexaamminecobalt(III)sulphate
e) sodiumtetrafluoridodihydroxidochromate(III)
3. Arrange the following
in order of increasing molar conductivity
i) Mg [Cr (NH3)
(Cl)5 ]
ii) [ Cr (NH3)5
Cl ]3 [CoF6]2
iii) [Cr (NH3)3
Cl3 ]
4. Ni2+ is identified using alcoholic solution of
dimethyl glyoxime. Write the structural formula for the rosy red precipitate of
a complex formed in the reaction.
5. [CuCl4 ]2− exists while [CuI4 ]2− does not exist why?
6. Calculate the ratio of [Ag+]/[Ag(NH3)2]
in 0.2 M solution of NH3. If the stability constant for the complex [Ag(NH3)2]
is 1 7 x 107.
7. Give an example of
coordination compound used in medicine and two examples of biologically
important coordination compounds.
8. Based on VB theory
explain why [Cr (NH3)6]3+ is
paramagnetic, while [Ni (CN)4]2- diamagnetic
9. Draw all possible
geometrical isomers of the complex [Co(
en)2 Cl2]+ and
identify the optically active isomer.
10. [Ti ( H2O)6]3+ is
coloured, while [Sc (
H2O)6 ]3+ is
colourless- explain.
12. Give an example for
complex of the type [Ma2
b2c2 ]
where a, b, c are monodentate ligands and give the possible isomers.
12. Give one test to differentiate [ Co (NH3)5Cl]
SO4 and [ Co( NH3)5 SO4 ] Cl.
13. In an octahedral crystal field, draw the figure to show
splitting of d orbitals.
14. What is linkage isomerism? Explain with an example.
15. Write briefly about the applications of coordination compounds
in volumetric analysis.
16. Classify the following ligand based on the number of donor
atoms.
a) NH3 b) en c) ox2- d)
triaminotriethylamine e) pyridine
17. Give the difference between double salts and coordination
compounds.
18. Write the postulates of Werner’s theory.
19. [Ni (
CN)4 ]2− is diamagnetic, while [ NiCl4 ]2− is paramagnetic ,
explain using crystal field theory.
20. Why tetrahedral complexes do not exhibit geometrical
isomerism.
21. Explain optical isomerism in coordination compounds with an
example.
22. What are hydrate isomers? Explain with an example.
23. What is crystal field splitting energy?
24. What is crystal
field stabilization energy (CFSE) ?
25. A solution of [Ni (H2O)6]2+
is green, whereas a solution of [Ni (CN)4 ]2+ is colorless - Explain
26. Discuss briefly the nature of bonding in metal carbonyls.
27. What is the
coordination entity formed when excess of liquid ammonia is added to an aqueous
solution of copper sulphate?
29. What are the limitations of VB theory?
30. Write the oxidation
state, coordination number , nature of ligand, magnetic property and electronic
configuration in octahedral crystal field for the complex K4[Mn (CN)6].
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