M.Sc. (Semester III) Examination Nov/Dec-2018
Physical Chemistry
SOLID STATE AND NUCLEAR CHEMISTRY
Time: 2½ Hours Max. Marks: 70
Instructions: All questions are compulsory.
Figures to the right indicate full marks.
Use of log table and calculator is allowed.
Q.1 Multiple choice questions 14
particle are
protons neutrons
electrons positrons
The most ionizing radiations among the following is
rays rays
rays neutrons
is India's first nuclear research reactor built in 1956.
Apsara Dhurva
Kaiga Kudankulam
In a body centered cubic lattice how many units are containing in unit cell.
2 4
6 1
The appearance of colour in solid alkali metal halides is generally due to
Schottky defect Frenkel effect
F centres Interstitial position
material is used as a clad for fuel in nuclear reactors.
Aluminium Magnox
Zirconium alloy All of these
Radioactive decay follows order kinetics.
first second
third zero
A total number of space groups in crystal is
7 14
32 230
The smallest interplanar spacing in a crystal which will give nth order Bragg
reflection is
dhkl n/2 dhkl n
dhkl n/3 dhkl n/4
10) What is typical detector dead time?
nsec
psec msec
11) The smallest collection of atoms/molecules in the crystal such that
replication of that generates the entire crystal is known as
crystal lattice unit cell
lattice planes crystal structure
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12) The orientation of lattice plane is described by its
Weiss indices Miller indices
Lattice points Lattice planes
13) A cubic crystal has three fold axes of symmetry.
2 4
6 3
14) Amorphous substances possesses their properties same in all directions.
This statement reflects that amorphous substances are
Anisotropic Isotropic
Symmetric Both a and b
Q.2 Answer the following (any four) 08
Name any two fertile nuclei.
What is symmetry? Mention various symmetry elements.
Define Weiss and Miller indices.
Why nuclear energy is green energy?
What do you mean by primitive unit cell?
Write notes on (any two) 06
Types of solids
Scintillation detector
Factors affecting the rate of solid state reactions.
Q.3 Answer the following (any two) 08
How sol-gel method is utilized preparation of nanomaterials?
What do you meant by sintering process?
Explain the method for growth of single crystal from solution.
Answer the following (any one) 06
Silver crystallizes in FCC crystal structure with unit cell length 408.6 pm.
Use Bragg equation to calculate first two diffraction angles from the
planes using incident X-ray wavelength 154.4 pm.
Draw the schematic diagram of Czochralskii method to grow single
crystals and mention its advantages over the other.
Q.4 Answer the following (any two) 10
Discuss with schematic diagram gas chamber nuclear radiation
detector.
Illustrate solid state decomposition reactions.
Write on breeder reactors.
Answer the following (any one) 04
State laws of crystallography.
Classify the nuclear reactors.
Q.5 Answer the following (any two) 14
Explain zone refining method in detail.
Discuss in detail the nuclear fission reaction.
Derive Bragg's equation.