Download GTU BE/B.Tech 2018 Winter 7th Sem New 2173615 New Functional Dyes And Recent Trends In Dyes Technology Question Paper

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Subject Code: 2173615

GUJARAT TECHNOLOGICAL UNIVERSITY

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BE - SEMESTER-VII (NEW) EXAMINATION - WINTER 2018

Date: 19/11/2018

Subject Name: New Functional dyes & Recent Trends in Dyes Technology

Time: 10:30 AM TO 01:00 PM

Instructions:

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

1. 1. Give the importance of metal complex dyes. MARKS 03
   2. Give the synthesis of Solvent Yellow 56. MARKS 04

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   3. What is meant by functional dyes? Discuss about interactions of functional dyes with considering heat, electricity, pressure, frictional force and pH. MARKS 07
2. 1. Write a note on fat and oil soluble dyes. MARKS 03
   2. Give the properties & applications of solvent dyes. MARKS 04
   3. Discuss the 1:2 chromium complex dyes with one sulphonic acid group. MARKS 07

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   OR

   1. Discuss the 1:2 chromium complex dyes with two or more sulphonic acid group. MARKS 07
3. 1. Write a short note on Dyes in electrography. MARKS 03
   2. Discuss application of functional dyes in Laser Printing. MARKS 04

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   3. Briefly explain the ingredients used in hair dyes. MARKS 07

   OR

   1. Give the synthesis of Food Yellow 3 & Food Red 9. MARKS 03
   2. Discuss Dyeing with Oxidation Dyes with respect to hair dyes. MARKS 04
   3. Briefly Explain Temporary ‘Hair Dye, Semi-Permanent Hair Dye and Permanent Hair Dye. MARKS 07

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4. 1. How do you differentiate-Right First Time (RFT) dyeing technology with conventional dyeing technology? MARKS 03
   2. Write down the benefits and properties of supercritical CO2 dyeing technology. MARKS 04
   3. What is Dye sensitized solar cell (DSSC)? How it works? MARKS 07

   OR

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   1. Explain-the following terms: (1) % Exhaustion (ii) Strike Temperature MARKS 03
   2. Discuss about the Ionic solvent. MARKS 04
   3. Give the various requirements in redox catalyst for indirect electrochemical dyestuff reduction. Discuss the electrochemical dyeing procedure. MARKS 07
5. 1. Discuss the mediator systems with respect to indirect electrochemical dyeing. MARKS 03

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   2. Discuss the natural dyes used as photo sensitizers for dye-sensitized solar cell. MARKS 04
   3. Explain the typical configuration and the setup of the dye bath monitoring system with suitable diagram. MARKS 07

   OR

   1. Write down the difference between conventional dyeing and electrochemical dyeing technology. MARKS 04
   2. Discuss the role of Protein in dye sensitized solar cell. MARKS 04

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   3. Explain supercritical CO2 dyeing technology with its advantages and disadvantages. MARKS 07

Total Marks: 70