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0000CYT100121901

PART छ
Answer one full question from each module, each question carries 14 marks

Module-I
Which are the different types of electrodes? Give examples for each type. Also

write the equation for the electrode potential of each type.
Illustrate the applications of electrochemical series with suitable examples.
What is the principle in potentiometric titration? Explain the end point
determination of a redox reaction by potentiometric titration.
Describe the methods of cathodic protection.

Module-II
Draw the expected NMR spectrum of methyl propanoate and point out how it
differs from ethyl acetate
Write the mathematical representation of the law governing absorption of light
by molecules of a solution. Also calculate the concentration of a solution if it
shows a transmittance of 20% when taken in a cell of 2.5 cm thickness (Molar
absorption coefficient is 12000 dm? 71011).
How can you differentiate NMR spectrum of വസം and CH3CHCl using
the concept of spin-spin splitting?
Comment on the various electronic transitions that are possible in the following
molecules (1) (26 (ii) CH3CH2OH and (iii) 1,3 butadiene.

Module-III
Explain the principle and instrumentation of DTA with a neat diagram.
Interpret the DTA thermogram of CaC204.H20.
Discuss the classification of nanomaterials based on materials.
Describe the principle, instrumentation, procedure and applications of GC.
Explain hydrothermal method of synthesis of nanomaterials.

Module-IV
What is optical isomerism? What are the conditions for a molecule to be
optically active? What are enantiomers and diastereoisomers? Give two
examples for each. Mention two properties each of enantiomers and
diastereoisomers.
What is polypyrrole? How is it synthesised? Mention two properties and two

applications of polypyrrole.

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