M.Sc. (Semester III) (CBCS) Examination Oct/Nov-2017
Physical Chemistry
SOLID STATE AND NUCLEAR CHEMISTRY
Day Date: Saturday, 25-11-2017 Max. Marks: 70
Time: 02.30 PM to 05.00 PM
Instructions: Attempt in all 5 questions.
All questions carry equal marks.
Question No.1, Section I is compulsory.
Attempt any two questions from Section II and any two from Section-III.
Answers to all questions (Section II and III) should be written in the one
answer book.
All questions carry equal marks.
Figures to the right indicate full marks.
Use of calculator and log-table is allowed.
SECTION-I
Q.1 Solve the following:- (one mark each) 14
The Miller indices of the plane parallel to z and y axis are
"X-ray scattering factor depends on the number of extra nuclear electrons of
the atom", state whether statement is true or false.
If 0.28 nm is the interionic distance in NaCl crystal, the unit cell dimension is
nm.
0.14 0.07
0.28 0.56
Give the mathematical expression which indicates the relation between rate
of decrease in intensity of nuclear radiation with thickness of matter(x)
through which it passes with usual notations.
What is the role of boron, cadmium and steel which are added in the nuclear
reactor?
Give the reaction of sulphidity of silver.
The ratio of reciprocals of the interplaner spacing is,
1


1


1

1:√2
√3
2
What is the lattice type of crystalline material belonging to cubic system?
If the size of impurity atom is smaller than host atom then by which one of
the following type doped material is formed?
Interstitial defect
Substitution defect
What is radioactivity?
Give Wagner Mechanism.
Indicate meaning of anisotropy.
Which one of the following is detected in electric field?
Alpha particle
Positron
What is free radical?
What is resonance fluorescence?
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SECTION-II
Q.2 Describe principle and working of X-ray Powder Diffraction method of lattice
structure analysis. How lattice types of cubic system are identified?
07
Distinguish lattice structure of body centered cubic lattice from simple cubic
lattice with respect to interplaner spacing's and number of atoms molecules
per unit cell.
The cell length and density of body centered cubic lattice are 2.88 A0 and
7.24 gm per cc of the element. Calculate the number of atoms in 104 gm of
element.
07
Q.3 Give the characteristics features of nuclear fission. Describe breeder reactor
with suitable schematic diagram.
07
Give a brief account on the methods of detection and measurement of
nuclear radiations.
07
Q.4 Give the principle underlying in the single crystal growth from solution.
Describe solvent evaporation method of single crystal growth from solution.
07
Discuss factors affecting solid state reactions. 07
SECTION-III
Q.5 Give a account of India's nuclear power programme. 05
Discuss chemical method of preparation for polyanthrance and comment on
its properties.
05
Give a brief account on significance of electron density map in determination
of structural formula of solid materials.
04
Q.6 What are zeolites? Discuss structure power programme. 05
How doped organic luminescent semiconducting materials are prepared.
Discuss generation of photoluminescence materials.
05
Discuss crystallography law regarding interfacial angles. 04
Q.7 Write short notes on any three of the following:- 14
Purification of semiconducting materials by zone refining method.
Phase transition reactions.
Polymorphism in solids.
Doppler broadening.