Master of Science II (Physical Chemistry)
Examination: Oct Nov 2016 Semester III (Old CGPA)
SLR No. Day
Date Time Subject Name Paper
No. Seat No.
SLR SD-
236
Friday
18/11/2016
02:30 P.M
to
05:00 P.M
Electrochemistry
C
X
Instructions: Attempt in all five questions.
All questions carry equal marks.
Section-I is compulsory and answer should be written in the
same answer book. Attempt at least two questions from Section
II and Section III.
Neat and labeled diagrams should be drawn wherever
necessary.
Figures to the right indicate marks.
Use of log table and calculators in allowed.
Total Marks:70
SECTION I
Q.1 Compulsory (One mark each) 14
What is the first postulate of Debye-Huckel theory of interionic attraction?
What is the effect of the concentration of electrolyte on the thickness of ionic
atmosphere?
The electrophoretic force retards the speed of an ion in solution. (True or false)
Write the Debye- Huckel Limiting law for a single ion.
Write the relationship between three forms of activity coefficients for dilute
solution.
At high frequency the conductance of an electrolyte
By which meachanism the abnormal conductance of hydrogen ion is
explained?
How do you verify the Deby-Huckel-Onsager equation?
Define Corrosion.
In Gemini and Appolo fuel cell what are the fuels used?
Write the expression for hydration energy according to Born- Haber method.
Name the primary slow step in the theories of overvoltage.
The mobile phase in electrophoresis is
Write the equation for efficiency of a fuel cell.
SECTION II
Q.2 Derive Debye- Huckel- Onsager equation. 07
What are the experimental proofs for Debye-Huckel theory? Explain how they
support the ionic atmosphere formation.
07
Q.3 Derive Debye- Huckel limiting law. 07
Explain the meachanism of abnormal ionic conductances of hydrogen and
hydroxyl ions.
07
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Q.4 Discuss in detail theories of overvoltage and identify the slow step. 07
Calculate the reversible decomposition potential of 0.5 n AgNo3 {Given a
0.396, Eo V and Eo -0.403
07
SECTION III
Q.5 Discuss the van Arkel and de Boer method of determining heats of hydration. 05
Describe the construction and working of natural gas CO-Air fuel cell. 05
04
Q.6 With suitable examples explain various indirect losses of corrosion. 05
Discuss the Helmholtz-Perrin theory of electrical double layer with its
limitations.
05
Explain the construction and working of Lippmann capillary electrometer. 04
Q.7 Write a note on any three of the following: 14
Effect of electrolytes on Zeta potential
Electrokinetic effects
Debey- Huckel- Bronsted equations
Electroforming technique