Master of Science II (Chemistry) Examination: Oct/Nov 2016
Semester III (New CBCS)
SLR No. Day
Date Time Subject Name Paper
No. Seat No.
SLR SD
285
Monday
21/11/2016
02.30 PM
to
05.00 PM
Nuclear Chemistry
C
XI
Instructions: Attempt in all five questions.
Section I is compulsory.
Attempt any two questions from Section II and any two
questions from Section III
Answer to all questions (Section II and III) should be written
in one answer book.
All questions carry equal marks.
Figures to right indicate full marks.
Use of log table and calculators is allowed.
Total Marks:70
SECTION I
Q.1 Answer the following: 14
Which methods are employed in isotope separation?
What is critical mass?
Name the heavy water production plants in India.
Which quantity is used in deciding nuclear reaction?
What is elastic scattering?
What is the reproduction factor K for nuclear reactors?
What is nuclear cross section?
What is threshold energy of nuclear reaction?
Complete the following nuclear reaction 92U238 (7N14, 5n)……..
Why cadmium and boron metals are used as a control rod in fission reactor?
On which factors does the stability of nucleus depend?
What is nuclear potential?
Who has proposed the term radioactivity?
What is radiolysis? List the products of radiolysis of water.
SECTION II
Q.2 Give Bohr's hypothesis of compound nucleus for nuclear reaction. What are
special nuclear reactions?
07
What are the types of nuclear reactions? Discuss the formation of compound
nucleus and compound nucleus theory in explaining the nuclear reaction
mechanism.
07
Q.3 What are magic and semi magic numbers? Give experimental evidence in
support of magic numbers. Write the nuclear shell configuration and predict
the spin and parity of following nuclei:
29Cu65 ii) 20Ca40
07
Explain heavy water manufacturer in India. 07
Page 1 of 2
Q.4 Define the G-value in radiation chemistry. Discuss the different types of
interactions between the charged particles of medium energy and matter.
07
Explain why do heavy nuclei posses excess neutrons? Find the most stable
isobar amongst 28Ni64 and 30Zn64 given that experimental mass of these nuclei
are 63.9380 a.m.u. and 63.9292 a.m.u. The masses of proton and neutron are
1.007825 a.m.u. and 1.008665 a.m.u respectively.
07
SECTION III
Q.5 Explain nuclear fission cross section and fission threshold energy. 05
U238 cannot be act as a nuclear fuel but it can act as a potential source of a
nuclear fuel. Explain.
05
Explain the nuclear stability with respect to binding energy. 04
Q.6 How the nuclear reactors are classified? Discuss the construction and working
of graphite moderated liquid sodium cooled reactor.
05
Discuss the prospects of the thermonuclear reactors as sources of energy. 05
Discuss the photonuclear reactions. 04
Q.7 Write short notes (Any three) 14
Fermi gas model.
Research reactor
Extraction of uranium.
N/P ratio nuclear stability