M.Sc. (Semester IV) (CBCS) Examination Mar/Apr-2018
Industrial Chemistry
NANOTECHNOLOGY AND INSTRUMENTAL ANALYSIS
Time: 2½ Hours
Max. Marks: 70
Instructions: Attempt five questions. All question carry equal marks. (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. Figures to the right indicate full marks.
Section I
Q.1
Answer the following:
14
What is a Miller index of a plane making intercept 1a, 1b and 1c?
What is meant by magnification?
What are the steps involved in synthesis of Sol-gel?
Which inert reference material is mostly used in DTA?
Draw the plane making intercept and 1/2c
In most DTA instruments temperature sensors are thermocouples. True or False
What is the principle of DSC?
Which method is used for the purification of silicon?
What is Electrodeposition process?
10) What is transmission electron microscopy?
11) Crystal structure whose side of the cube is 0.361 nm. Find the inter planer distance for 2 plane?
12) Write the equation for relation between "r" and "a" for BCC
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 Destructive interference phenomenon? Derive Bragg equation.
07
What is the Principle of Thermogravimetry? Explain the schematic representation of Thermogravimetry instrument.
07
Q.3
Explain in detail the Magnetic sputtering process.
07
Explain with principle, schematic working of Scanning electron Microscope
07
Q.4
Discuss in detail the spray pyrolysis process.
07
What is the principle of X-ray photoelectron spectroscopy? Discuss in detail with schematic diagram the working of X-ray photoelectron spectroscopy.
07
Section III
Q.5
Calculate the diffraction angle for the first order reflection from the 1 set of planes for BCC chromium when monochromatic radiation of wavelength 0.0711 is used?
05
Explain in detail factors affecting DTA curves
05
What are the different modes of actions adopted in Atomic Force Microscope
04
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SLR-UF-181
Q.6
X-ray diffraction of copper has a face centered cubic structure, which is done using X-ray with a wavelength of 0.154nm. One peak is seen in XRD pattern at theta =21.6° What are the miller indices for this peak?
05
Explain in detail Hydrothermal method
05
What are the applications of Atomic Force Microscope?
04
Q.7
Write a note on any Three of the following.
14
X-ray production
Application of DTA technique
Sol-gel method
Applications of transmission electron microscopy