M.Sc. (Semester II) (CBCS) Examination Nov/Dec-2018
Nano-Technology
CARBON AND NANOFORMS OF CARBON
Time: 2½ Hours Max. Marks: 70
Instructions: Part question 1 is compulsory.
Attempt any four questions from Part II
Figures to the right indicate full marks.
Answers to the Part I and Part II are to be written in same answer
Booklet only.
PART I
Q.1 Rewrite the sentence after choosing correct answer from the given
alternatives:
07
A unit cell of a diamond contains
2 atoms 4 atoms
6 atoms 8 atoms
In ABAB stacking arrangement of graphite planar honeycomb
network the in-plane lattice constant and inter planar distance are

2.456Å 3.354Å 3.354Å 6.708Å
2.456Å 6.708Å 3.354Å 2.456Å
Activated carbon is solid.
Amorphous Crystalline
Toxic Fibrous
Nano diamonds can be synthesized using detonation of
TNT RDX
Graphite RDX All the given options
Graphite with defects or disorderliness with inter planar distance
more than 3.354Å is termed as
Turbostatic graphite Kish graphite
Graphite whiskers Bernel graphite
The carbon-carbon bondings in fullerene have some sp3 character
because of
Impurities in fullerene High curvature if fullerene
Larger C-C bond distance 20 hexagons in fullerene
Graphite can be used as
Lubricant
Precursor for nano diamond synthesis
Electrode in arc discharge method
All the given alternatives
Page 2 of 2
SLR-VT-531
Q.1 Define/Explain the following terms in couple of sentences. 07
Chemical vapour deposition
Kish graphite
LASER
Plasma
Photocatalysis
Pyrolysis
Fluorescence
PART II
Answer any four of the following:
Q.2 Explain tip growth model of CNT. 14
Q.3 Describe synthesis of nano diamonds using RDX. 14
Q.4 What are the steps involved in CVD methods? Explain 14
Q.5 Explain bottom growth model of CNT. 14
Q.6 Answer any two of the following: 14
Explain how quantum dot can be synthesized using opening of fullerene
cage.
Describe PLD techniques for synthesis of nano particles.
Explain microwave assisted method for carbon dot synthesis.
Q.7 Attempt any two of the following:- 14
Write short note on diamond.
Give brief note on graphene quantum dots and carbon dots.
Write note on armchair, Zigzag and chair patterns in CNT.