15
16

21

22

23

a)
b)

b)

b)

b)

a)
b)

B1901

Explain what are solid lubricants with suitable examples?
Explain the preparation of Bio-diesel. What are the important constituents of
Bio-diesel?
Plot a diagram of break point chlorination and What is its significance?
Calculate the carbonate and non carbonate hardness of a sample water
containing 7.3 mg/L of Mg(HCO3):, 40.5 mg/L of Ca(HCO3):, 13.6 mg/L of
CaSOx,
PART €
Answer all questions, each carries 10 marks.

What are the various types of electronic transitions in UV-visible spectroscopy?
Discuss the applications of IR spectroscopy.

OR
What are the different types of NMR active nuclei? How many spin
orientations are possible in a magnetic field when [= 1/2 and I=1 give examples.
Explain the terms shielding and de-shielding in NMR spectroscopy.
What are fuel cells? Explain the construction and working of Hz - റം fuel cell.
What are the advantages and disadvantages of a fuel cell?

OR
What are reference electrodes? Give examples for primary reference and
secondary reference electrodes and give their electrode reactions.
Explain how single electrode potential of Zn electrode is determined?
Write down the principle and instrumentation of DTA with a neat diagram.
Draw the DTA of calcium oxalate and explain the different reactions.

OR
Explain the principle and classification of chromatography.
Write a note on column chromatography.
Discuss the working of OLED with diagram. Give its two important advantages
over conventional display devices.
How do you synthesise polyaniline, Give two properties and applications.

OR
What are conducting polymers? Give the classification.
How will you dope a conducting polymer? Give the mechanism of conduction

in doped polymer.

Page 2 of 3

(3)

(5)
(5)

(5)

(5)
(6)
(4)

(6)

(4)
(5)
(5)

(5)
(5)
(5)

(5)

(5)
(5)