M.Sc. (Semester IV) (CBCS) Examination Nov/Dec-2018
Industrial Chemistry
NANOTECHNOLOGY AND INSTRUMENTAL ANALYSIS
Time: 2½ Hours
Max. Marks: 70
Instructions: Attempt five questions. (Section Q.1 is compulsory. Attempt any two questions from section II and two from section III. Answer to all questions (section II and III) should be written in the one same answer book. All question carry equal marks. Figures to the right indicate full marks.
Section I
Q.1
Answer the following:
14
Draw the plane making intercept and 1/3c.
What electronic materials are purified by Zone refining process?
What is meant by Resolution?
Horizontal portion in TG curve indicate no weight loss. True of false.
What is Miller index of a plane making intercept and
SiO2+2C
What is principle of DSC?
What are different types of sample holder used in TGA instrument?
How does resolution get improve in Electron Microscopy?
10) Write the equation for relation between "r" and "a" for FCC.
11) What is the sequence of events that occur at a surface in a CVD process?
12) Crystal structure whose side of the cube is 0.361 nm. Find the interplaner distance for 2 plane?
13) How many particles are present in simple cubic unit cell?
14) What is meant by Topography of an object?
Section II
Q.2
What is a Constructive interference phenomenon? Derive Bragg equation.
07
Explain the schematic representation of Differential thermal analysis instrument.
07
Q.3
What are the basic chemical reactions involved in CVD process? Give some examples.
07
Discuss with schematic diagram, the principle, working of Transmission electron Microscope.
07
Q.4
What is the principle of Atomic force Microscope? Discuss with schematic diagram working of Atomic force microscope.
07
Discuss in detail hydrothermal method.
07
Section III
Q.5
Derive density of a crystal equation by unit cell method.
05
Discuss factors affecting TGA curves with respect to heating rate and effect of furnace temperature.
05
Explain utility of Amorphous and Crystalline Sillicon on the basis of their properties.
04

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SLR-VF-145
Q.6
The unit cell of aluminum is a cube with edge length 4.05x10-3cm. The density of aluminum is 2.70 g cm-3. What is the structure of aluminum crystals?
05
Explain in detail sol-gel method.
05
Explain different types of analyzer used in XPS.
04
Q.7
Write a note on any Three of the following.
14
Chemical Bath Deposition
Application of Thermogravimetry
Application of Scanning electron microscope
Laue photographic method