M.Phil Ph.D. Course Work Examination June July 2017
CHEMISTRY (Paper III)
Modern Topics in Physical Chemistry
Day Date: Thursday, 29-06-2017 Max. Marks: 100
Time: 11.00 AM to 02.00 PM
Instructions: All questions are compulsory.
Use of scientific calculator is allowed.
Neatly drawn and labeled diagrams are necessary.
Q.1 Answer any two: 10
Draw the crystal structures for NaCl and explain how Na+ and Clions
are packed.
Discuss band theory of ferromagnetism.
Write short note on polymorphism.
What are Zeolites? Discuss synthesis and microporous structure of
Zeolite aluminosilicate.
10
Q.2 Discuss the factors which are affecting solid state reactions. 10
Answer Any Two: 10
How does the paramagnetic susceptibility of materials vary with
temperature?
What are hard and soft magnetic materials?
Discuss electrical conductivity of zinc ferrite.
Q.3 What is Bragg's condition? Derive and use the condition for
diffraction of X-ray from lattice plane. Describe application X-ray
diffractometer method for determining lattice constant.
10
Answer Any Two: 10
Write note on law of symmetry.
A sodium chloride crystal used to measure the wave length of a
source of X-ray. The first order diffraction angle for the
plane spacing of chlorine is 5.2o. What is the wave length if
lattice constant is 5.63 Ao.
Discuss crystal systems and Bravais space lattices.
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Q.4 Give the basic principle of tracer technique? What is direct isotope
dilution method? Explain application of this method for determination
of blood volume.
10
Answer Any Two: 10
Explain the meaning of radioactive equilibrium, secular
equilibrium and Transient equilibrium.
Discuss basic principle and applications of radio
chromatography.
Write note on mechanism of Neutron activation Analysis.
Q.5 Discuss use of Dynamic Light Scattering Technique to characterize
nanoparticles.
10
Answer Any Two: 10
Indicate meaning of morphology of nanostructured materials.
Give a short review on the techniques used for examining
morphology of materials.
Describe sol-gel method of preparation of metal oxide
nanoparticles.
Discuss synthesis CdS nanoparticles by electrostatic
entrapment.