GTU BE 6th Semester 2163604 Technology of Pigments Summer 2018 Question Paper

Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE – SEMESTER ?VI (NEW) – EXAMINATION ? SUMMER 2018
Subject Code: 2163604 Date: 05/05/2018
Subject Name: Technology of Pigments
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.

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MARKS
Q.1 (a)What is Pigment? Explain with its types?
03
(b)What is Colour? Explain the concept of Colour blindness?
04
(c)Discuss Vapour phase oxidation with suitable example. Explain factors
controlling it.
07

Q.2 (a)What is the difference between pigments & fillers?
03
(b)Explain the processing, properties & applications of BaSO 4?
04
(c)Discuss co-precipitation with suitable example. Explain factors controlling
precipitation.
07
OR
(c) Write short note on: Drying & Evaporation 07
Q.3 (a)Explain the properties of Pigmentory TiO 2 in reference to specific gravity, oil
absorption value, refractive index.
03
(b)Explain the processing, properties & applications of Barytes?
04
(c)Explain the synthesis of TiO 2 by Sulfate method with flow sheet?
07
OR
Q.3 (a) What are lakes & toners? 03
(b) Explain properties of Prussian Blue pigments. 04
(c) Discuss Carbon black pigments with synthesis of any one of it? 07

Q.4 (a) Discuss the difference between pigments & extenders. 03
(b) Explain the synthesis of ZnO pigments by using direct Process? 04
(c) Explain the synthesis of TiO2 by Chloride Method with flow sheet? 07
OR
Q.4 (a) Explain properties of Hansa Yellow pigments. 03
(b) Explain light fastness of pigments and factors affecting on it. 04
(c) What is bleeding tendency? Explain it with procedure. 07
Q.5 (a) What is oil absorption value of pigments? Give significance of it. 03
(b) Explain the processing, properties & applications of CaCO3? 04
(c) Explain the small scale preparation of Benzene with chemical reactions. 07
OR
Q.5 (a) What is carbonization of coal? 03
(b) Explain Coal tar distillation and processing of distillation products? 04
(c) Explain the large scale preparation of Benzene with chemical reactions. 07