GTU BE/B.Tech 2019 Winter Question Papers || Gujarat Technological University
Enrolment No.
BE - SEMESTER- III (New) EXAMINATION — WINTER 2019
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Subject Code: 3133905 Date: 3/12/2019
Subject Name: Elements of Nanochemistry
Time: 02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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| Marks | |
|---|---|
| Q.1 (a) Give the name of various type of nanotechnology. | 03 |
| (b) Define: Nanoscience and Nanotechnology. | 04 |
| (c) Write a short note on CVD method for synthesis of nanostructured material. | 07 |
| Q.2 (a) Write down name of various synthesis techniques for synthesis of nanomaterials. | 03 |
| (b) Draw the schematic representation of various types of carbon nanotubes. | 04 |
| (c) Explain Properties of nanomaterials. | 07 |
| OR | |
| (c) Explain Sol-Gel technique. | 07 |
| Q.3 (a) Explain Ostwald ripening. | 03 |
| (b) Explain Nucleation and Growth of colloid. | 04 |
| (c) Write down applications of nanomaterials. | 07 |
| OR | |
| Q.3 (a) Explain Catalyzed (seeded) growth in colloid. | 03 |
| (b) Give a short note on anisotropic growth and shape control. | 04 |
| (c) Give a brief note on nanocrystal doping. | 07 |
| Q.4 (a) Define adsorption in surface chemistry. | 03 |
| (b) Explain applications of small surface in materials, lightning, and energy conversion (solar cells). | 04 |
| (c) What is the role of curvature effect on chemical reactivity? | 07 |
| OR | |
| Q.4 (a) Define: Nanoholes and photons in the vicinity of solar cell. | 03 |
| (b) Give drawbacks of liquid Electrolyte used in nanostructured solar cell | 04 |
| (c) Explain applications of small surface in catalysis. | 07 |
| Q.5 (a) Explain sample cleaning and chemical purification in nanotechnology. | 03 |
| (b) Write down environment applications of nonmaterial. | 04 |
| (c) Explain how nanotechnology will affect our life in the future, give your vision. | 07 |
| OR | |
| Q.5 (a) Define water purification methods. | 03 |
| (b) Give a brief note on flammable and toxic hazards. | 04 |
| (c) Explain chemical and biological contamination and safety issues in environmental safety. | 07 |
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