Saurastra University 2006 M.Sc Computer Science Physical Chemistry : - IX (Selected topics in Physical Chemistry) - Question Paper

M. Sc. (Part - II) exam
April / May – 2006
Physical Chemistry : Paper - IX
(Selected topics in Physical Chemistry)
Time : three Hours] [Total Marks : 100
Instructions : (1) All ques. carry equal marks.
(2) Attempt 5 ques. in all.
(3) ques. No. one is compulsory.
1 ans the subsequent : (any four)
(a) describe : Dosimetry, Binding Energy, Radioactivity, Anisotropic
material, Breeder.
(b) State the applications of superconductors.
(c) How will you determine cut off wavelength ? provide the
relationship ranging from lmin and lmax ? compute lmin and
lmax for X-ray tube operating at 50 kV.
(d) provide the synthesis of C14 and S35.
(e) What do you mean by ultrasonic ? explain the applications
of ultrasonic in brief.
(f) elaborate the factors responsible for liquid crystal formation?
(g) How n p ratio affects the nuclear stability ?
(h) define scintillation counters.
2 (a) Derive an expression for decay constant l .
(b) compute the weight of (i) 10 mc of Au198 t days
1 two e = 2. 69 j and
(2) 10 mc of Co60 t years
1 two e = 5. 28 j.
3 (a) define in detail the characteristics of a nuclear reactor.
(b) From the subsequent data, compute the acoustic impedance,
isentropic compressibility and relaxation strength for all the
solutions at 30°C Uµ = 1. six × 105 cm sec e j.
XA  g cme three j U g sec a f
0.0000 0.7910 1.1579 × 105
0.0960 0.8164 1.1426 × 105
0.1986 0.8406 1.1927 × 105
0.4265 0.8887 1.2484 × 105
0.6905 0.9365 1.3542 × 105
0.8388 0.9612 1.3813 × 105
4 (a) For FCC nearest packing show that packing efficiency is
73.98%.
(b) Show that intensity of an X-ray beam from hkl plane is
proportional to the square of the amplitude.
(c) An element crystallises, into a structure which may be
defined by a cubic kind of an unit cell having 1 atom
on every corner of the cube and 2 atoms on 1 of its
diagonals. If the quantity of this cell is 24 × 10-24 cm3;
compute the number of atoms current in 200 g of elements.
(d) explain the different class and kinds of liquid crystals.
5 Write notes on : (any two)
(a) kinds of crystals
(b) Atom bomb
(c) Van de Graaff
(d) Characteristics of superconductors
(e) Use of radio tracers in medical and biological fields.
6 (a) define in detail the basic reactions involving active species
produced in the primary act.
(b) discuss the thermodynamic isotopic effect.
7 (a) discuss the kinetics of heterogeneous isotope exchange
reactions in detail.
(b) discuss the subsequent :
(i) Frickle dosimetry
(ii) Criteria for selection of radio isotope as tracer.
ST-2759] two [ 100 ]

Earning:   Approval pending.