GTU BE 2019 Summer Question Papers || Gujarat Technological University
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-I & II (NEW) EXAMINATION — SUMMER-2019
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Subject Code: 3110001 Date: 03/06/2019
Subject Name: Chemistry
Time: 10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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| Q.1 | (a) Define electron affinity and discuss its variation in periodic table. | 03 |
| (b) What do you understand by hardness of water? Differentiate between temporary and permanent hardness. | 04 | |
| (c) What is polymerization? Give a detailed classification of polymers with suitable examples. | 07 | |
| Q.2 | (a) What is vulcanization of Rubber? Why vulcanization is done? | 03 |
| (b) Write characteristics of a good fuel. | 04 | |
| (c) With a neat and well labeled diagram, explain fractional distillation of petroleum. | 07 | |
| OR | ||
| (c) Give classification of fuel. Discuss proximate analysis of fuel. | 07 | |
| Q.3 | (a) Write monomers, properties and uses of following polymers: (1) Bakelite (ii) Nylon 66 | 03 |
| (b) Answer the following: | 04 | |
| (1) H20 is liquid at room temperature while H>S is gas. Why? | ||
| (ii) What is coordinate bond? Give example of a coordinate compound. | ||
| (c) Discuss ‘Zeolite processes of softening of water with neat diagram. | 07 | |
| OR | ||
| Q.3 | (a) Define pH. Calculate pH of .02 N H2SO4. | 03 |
| (b) Differentiate between: | 04 | |
| (1) Stretching and bending vibration | ||
| (j) Thermosetting and thermoplastic polymer | ||
| (c) Write a note on disadvantages of using hard water in boiler. | 07 | |
| Q.4 | (a) What are alloys? Give example and explain why alloying is done? | 03 |
| (b) Write a short note on ‘top down’ and ‘bottom up approach’ to synthesize Nanomaterials. | 04 | |
| (c) What is ‘Fermentation’? Explain manufacturing of ethanol by fermentation process. | 07 | |
| OR | ||
| Q.4 | (a) Write a brief note on physical properties of metals. | 03 |
| (b) What are Nanomaterials? Write a note on application of Nanomaterials. | 04 | |
| (c) Explain applications of Nanomaterials in medicinal field. | 07 | |
| Q.5 | (a) What are fullerenes? Explain properties of fullerenes in short. | 03 |
| (b) Write principle of UV-VIS spectroscopy. | 04 | |
| (c) What is corrosion? Explain wet corrosion or electrochemical corrosion of iron. | 07 | |
| OR | ||
| Q.5 | (a) Give Reason: | 03 |
| (1) First ionization energy (IE1) of Nitrogen (atomic Number = 7) is higher than Oxygen (atomic Number = 8). | ||
| (ii) Noble gases (Group 18) have zero valency. | ||
| (b) Answer the following: | 04 | |
| (1) What are polar and non-polar covalent bonds? | ||
| (ii) Write electronic configuration of Cr(Atomic Number 24) | ||
| (c) Write a brief note on protective coating. | 07 |
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