DISTANCE EDUCATION
M.Sc. (Chemistry) DEGREE EXAMINATION, MAY 2017.
INORGANIC CHEMISTRY I
(2008 onwards)
Time Three hours Maximum 100 marks
Answer any FIVE questions.
Each question carries 20 marks.
× 20 100)
1. What is symbiosis? Explain briefly with suitable
examples.
What is lattice energy? How is it calculated by
Born-Lande equation? Explain.
What are the postulates of VSEPR theory? Mention
its defects.
2. Explain the crystal structure of ZnS and fluorite.
What are Schottky and Frenkel defects? Explain
them with suitable examples.
Write a note on F-centres.
3. Explain any two methods of detect and measure
radioactivity.
Discuss in detail the composition and properties of
nuclei.
What are nuclear reactions? Explain any four
nuclear reactions with suitable examples.
Sub. Code
12
DE-660
2
Ws 11
4. Discuss briefly the spectral and magnetic properties
of actinides. Compare these properties with
lanthanides.
Discuss the position of lanthanides and actinides in
the periodic table.
How are lanthanides separated by fractional
crystallization method?
5. Discuss in detail the isopoly acids formed by
vanadium and molybdenum.
What are silicates? Explain the structure of
pyroxenes and amphiboles in detail.
Explain the structure of feldspar.
6. Derive Born-Meyer equation for the lattice energy of
an ionic compound.
Write a note on symmetry of molecular orbitals.
State and explain the Pearson's concept of hard
soft acids and bases with suitable examples.
7. What is meant by radioactive decay? Explain briefly
the theories of decay processes.
Write a note on liquid drop model and neutron
activation analysis.
State and explain the laws of radioactivity.
8. May trivalent lanthanide ions are coloured. Explain.

State and explain Slater's rules.
Draw and explain the MO diagrams of F2 and HCl
molecules.