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

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Subject Code: 2170508

GUJARAT TECHNOLOGICAL UNIVERSITY

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BE - SEMESTER- VII (New) EXAMINATION — WINTER 2019
Subject Name: Nano Technology
Time: 10:30 AM TO 01:00 PM

Instructions:

1. Attempt all questions.

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2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

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

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Q.2 (a) Briefly explain which properties of materials enhance at nano scale. MARKS 03
(b) Differentiate between 1D and 2D structure with suitable sketch. MARKS 04
(c) Explain the potential applications of nano dimensional materials in security, life science and electronics. MARKS 07

OR

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

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Q.3 (a) Define and explain various defect in nano material. MARKS 03
(b) Why the nano catalyst gives better result in chemical synthesis? Explain with suitable example? MARKS 04
(c) Explain principle, working and application of sol-gel method. MARKS 07

OR

Q.3 (a) Briefly discuss the advantage of nano material in chemical industries. MARKS 03

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(b) Differentiate between Wet etching and Dry etching. MARKS 04
(c) Explain the principle, and working-of Co-precipitation method for nano synthesis. MARKS 07

Q.4 (a) Discuss the use of nano material in day to day life. MARKS 03
(b) What is micro emulsion? List the advantage of micro emulsion. MARKS 04
(c) Explain the principle, working and application of spray pyrolysis method. MARKS 07

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OR

Q.4 (a) Define (1) Carbon nano tube (2) Nano silver MARKS 03
(b) Identify and discuss the application of nano material in cosmetic. MARKS 04
(c) Explain the effect of nanometer length on the physicochemical properties of material. MARKS 07

Q.5 (a) Discuss about nano sensor. MARKS 03

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(b) How the SEM differ from TEM. MARKS 04
(c) Explain the principle, working and construction of UV-visible spectroscope. MARKS 07

OR

Q.5 (a) Discuss the electro deposition process. MARKS 03
(b) Briefly describe AFM and its application. MARKS 04

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(c) Explain the principle, working and construction of XRD. MARKS 07

Date: 03/12/2019
Total Marks: 70

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