Download GTU BE/B.Tech 2019 Winter 7th Sem New 2170508 Nano Technology Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Winter 7th Sem New 2170508 Nano Technology Previous Question Paper

1
Seat No.: ________ Enrolment No.___________

GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER ? VII (New) EXAMINATION ? WINTER 2019
Subject Code: 2170508 Date: 03/12/2019

Subject Name: Nano Technology
Time: 10:30 AM TO 01:00 PM Total Marks: 70

Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.


MARKS

Q.1 (a) Define (1) Nano wire (2) Quantum dot (3) Magic number 03
(b) Differentiate between Nano material and bulk material 04
(c) Discuss the various approaches required to build the nano materials? 07

Q.2 (a) Briefly explain which properties of materials enhance at nano scale. 03
(b) Differentiate between 1D and 2D structure with suitable sketch. 04
(c) Explain the potential applications of nano dimensional materials in
security, life science and electronics.

07
OR
(c) Explain the application of nano material in ceramic. 07

Q.3 (a) Define and explain various defect in nano material. 03
(b) Why the nano catalyst gives better result in chemical synthesis? Explain
with suitable example?
04
(c) Explain principle, working and application of sol-gel method. 07
OR
Q.3 (a) Briefly discuss the advantage of nano material in chemical industries. 03
(b) Differentiate between Wet etching and Dry etching. 04
(c) Explain the principle, and working of Co-precipitation method for nano
synthesis.
07

Q.4 (a) Discuss the use of nano material in day to day life. 03
(b) What is micro emulsion? List the advantage of micro emulsion. 04
(c) Explain the principle, working and application of spray pyrolysis method. 07
OR
Q.4 (a) Define (1) Carbon nano tube (2) Nano silver 03
(b) Identify and discuss the application of nano material in cosmetic. 04
(c) Explain the effect of nanometer length on the physicochemical properties
of material.
07

Q.5 (a) Discuss about nano sensor. 03
(b) How the SEM differ from TEM. 04
(c) Explain the principle, working and construction of Vu-visible spectroscope. 07
OR

Q.5 (a) Discuss the electro deposition process.

03
(b) Briefly describe AFM and its application. 04
(c) Explain the principle, working and construction of XRD. 07

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