GTU BE/B.Tech 2018 Winter Question Papers || Gujarat Technological University
Subject Code: 2153608
BE - SEMESTER-V (NEW) EXAMINATION — WINTER 2018
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Subject Name: Chemistry of Intermediates & Colorants-III
Date: 04/12/2018
Time: 10:30 AM TO 01:00 PM
Total Marks: 70
Instructions:
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- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
| Q.No. | Question | Marks |
|---|---|---|
| Q.1 (a) | Give the synthesis of Ultraphore WT. | 03 |
| Q.1 (b) | Write down the properties of Fluorescent Brightening Agents. | 04 |
| Q.1 (c) | Briefly explain Stock’s rule with a suitable diagram. | 07 |
| Q.2 (a) | Give the synthesis of the following paper dyes: Direct Orange 102 & Red 239 | 03 |
| Q.2 (b) | Explain the importance of tanning agents in leather dyes. | 04 |
| Q.2 (c) | Briefly explain the low molecular weight leather dyes with two syntheses. | 07 |
| OR | ||
| Q.2 (c) | Briefly explain the importance of resorcinol leather dyes with any one synthesis. | 07 |
| Q.3 (a) | Define the term Disperse Dyes. Give the properties of disperse dyes. | 03 |
| Q.3 (b) | Explain the bisazo disperse dyes. | 04 |
| Q.3 (c) | Briefly explain monoazo disperse dyes with a heterocyclic compound as a coupling compound. | 07 |
| OR | ||
| Q.3 (c) | Discuss the Thermosol process for disperse dyes. | 03 |
| Q.4 (a) | Explain the anthraquinone disperse dyes. | 04 |
| Q.4 (b) | Briefly explain monoazo disperse dyes with a heterocyclic compound as a diazo compound. | 07 |
| Q.4 (c) | Give the synthesis of Flavanthrone. | 03 |
| Q.5 (a) | Explain the estimation of sulphur dyes. | 04 |
| Q.5 (b) | Briefly explain the properties of sulphur dyes. | 07 |
| OR | ||
| Q.5 (c) | Give the synthesis of Indenthrene Khakhi GG. | 03 |
| Q.5 (a) | Write a short note on Anthraquinone Carbazole Vat dyes. | 04 |
| Q.5 (b) | Discuss the fastness properties of Sulphur dyes. | 07 |
| Q.5 (c) | Give the synthesis of Reactive Black 5. | 03 |
| Q.5 (a) | Explain the present and future trends of reactive dyes. | 04 |
| Q.5 (b) | Briefly explain bi-functional reactive dyes. | 07 |
| Q.5 (c) | Give any one synthesis of Cold Brand Reactive Dyes. | 03 |
| Q.5 (a) | How are reactive dyes superior to vat and direct dyes? | 04 |
| Q.5 (b) | Briefly explain the constitution of reactive dyes. | 07 |
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