Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2018 Winter 7th Sem New 2173615 New Functional Dyes And Recent Trends In Dyes Technology Previous Question Paper
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VII (NEW) EXAMINATION ? WINTER 2018
Subject Code: 2173615 Date: 19/11/2018
Subject Name: New Functional dyes & Recent Trends in Dyes Technology
Time: 10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
MARKS
Q.1 (a) Give the importance of metal complex dyes. 03
(b) Give the synthesis of Solvent Yellow 56. 04
(c) What is meant by functional dyes? Discuss about interactions of
functional dyes with considering heat, electricity, pressure, frictional
force and pH.
07
Q.2 (a) Write a note on fat and oil soluble dyes. 03
(b) Give the properties & applications of solvent dyes. 04
(c) Discuss the 1:2 chromium complex dyes with one sulphonic acid group. 07
OR
(c) Discuss the 1:2 chromium complex dyes with two or more sulphonic
acid group.
07
Q.3 (a)
Write a short note on Dyes in electrography.
03
(b) Discuss application of functional dyes in Laser Printing. 04
(c)
Briefly explain the ingredients used in hair dyes.
07
OR
Q.3 (a) Give the synthesis of Food Yellow 3 & Food Red 9. 03
(b) Discuss Dyeing with Oxidation Dyes with respect to hair dyes. 04
(c)
Briefly Explain Temporary Hair Dye, Semi-Permanent Hair Dye and
Permanent Hair Dye.
07
Q.4 (a) How do you differentiate Right First Time (RFT) dyeing technology
with conventional dyeing technology?
03
(b) Write down the benefits and properties of supercritical CO2 dyeing
technology.
04
(c)
What is Dye sensitized solar cell (DSSC)? How it works?
07
OR
Q.4 (a) Explain the following terms:
(i) % Exhaustion (ii) Strike Temperature
03
(b) Discuss about the Ionic solvent. 04
(c) Give the various requirements in redox catalyst for indirect
electrochemical dyestuff reduction. Discuss the electrochemical dyeing
procedure.
07
Q.5 (a) Discuss the mediator systems with respect to indirect electrochemical
dyeing.
03
(b) Discuss the natural dyes used as photo sensitizers for dye-sensitized
solar cell.
04
(c) Explain the typical configuration and the setup of the dye bath
monitoring system with suitable diagram.
07
OR
Q.5 (a) Write down the difference between conventional dyeing and
electrochemical dyeing technology.
03
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1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VII (NEW) EXAMINATION ? WINTER 2018
Subject Code: 2173615 Date: 19/11/2018
Subject Name: New Functional dyes & Recent Trends in Dyes Technology
Time: 10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
MARKS
Q.1 (a) Give the importance of metal complex dyes. 03
(b) Give the synthesis of Solvent Yellow 56. 04
(c) What is meant by functional dyes? Discuss about interactions of
functional dyes with considering heat, electricity, pressure, frictional
force and pH.
07
Q.2 (a) Write a note on fat and oil soluble dyes. 03
(b) Give the properties & applications of solvent dyes. 04
(c) Discuss the 1:2 chromium complex dyes with one sulphonic acid group. 07
OR
(c) Discuss the 1:2 chromium complex dyes with two or more sulphonic
acid group.
07
Q.3 (a)
Write a short note on Dyes in electrography.
03
(b) Discuss application of functional dyes in Laser Printing. 04
(c)
Briefly explain the ingredients used in hair dyes.
07
OR
Q.3 (a) Give the synthesis of Food Yellow 3 & Food Red 9. 03
(b) Discuss Dyeing with Oxidation Dyes with respect to hair dyes. 04
(c)
Briefly Explain Temporary Hair Dye, Semi-Permanent Hair Dye and
Permanent Hair Dye.
07
Q.4 (a) How do you differentiate Right First Time (RFT) dyeing technology
with conventional dyeing technology?
03
(b) Write down the benefits and properties of supercritical CO2 dyeing
technology.
04
(c)
What is Dye sensitized solar cell (DSSC)? How it works?
07
OR
Q.4 (a) Explain the following terms:
(i) % Exhaustion (ii) Strike Temperature
03
(b) Discuss about the Ionic solvent. 04
(c) Give the various requirements in redox catalyst for indirect
electrochemical dyestuff reduction. Discuss the electrochemical dyeing
procedure.
07
Q.5 (a) Discuss the mediator systems with respect to indirect electrochemical
dyeing.
03
(b) Discuss the natural dyes used as photo sensitizers for dye-sensitized
solar cell.
04
(c) Explain the typical configuration and the setup of the dye bath
monitoring system with suitable diagram.
07
OR
Q.5 (a) Write down the difference between conventional dyeing and
electrochemical dyeing technology.
03
2
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(b)
Discuss the role of each ingredients involved in dye sensitized solar cell.
04
(c) Explain supercritical CO2 dyeing technology with its advantages and
disadvantages.
07
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This post was last modified on 20 February 2020