Download GTU BE/B.Tech 2019 Winter 3rd Sem New 2133506 Physico Chemical Processes Question Paper

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GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER- III (New) EXAMINATION — WINTER 2019

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Instructions:

1. Attempt all questions.

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2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

MARKS

Q.1

1. Write a note on consecutive reaction. 03

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2. Write a note on Armstrong theory of indicators. 04
3. Write a note on electric double layer and zeta potential. 07

Q.2

1. Give example for zero, one and two degree of freedom. 03
2. What is the difference between electro chemical and electrolytic cell? Explain galvanic cell in details. 04

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3. What do you mean pseudo order reaction? Derive equation for zero order reaction. 07

OR

1. Write a note on buffer solution and derive the equation for both acid and base. 07

Q.3

1. Write a note on application of colloids. 03

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2. What do you mean by thermochemistry? Derive equation for calculation of half-cell potential. 04
3. Write a note on purification techniques of colloids. 07

OR

1. Explain mechanism of catalysis for acid base in details 03
2. What do you mean by redox reaction? Explain Daniel cell in details. 04

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3. Explain one component water system by neat and clean phase diagram. 07

Q.4

1. Define the term colloids. Give classification of colloids based on disperse phase and disperse medium. 03
2. Derive units of zero, first, second and third order reaction. 04
3. Write a short note on common ion effect with examples. 07

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OR

1. Draw phase diagram for four phase and one component system 03
2. Find the pH of a buffer solution containing 0.10 mole per litre CH3COONa and 0.12 mole per litre CH3COOH. Ka for acetic acid is 1.8 x 10^-5. 04
3. What do you mean by condensed system? Explain phase rule for condensed system. 07

Q.5

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1. Explain promoters, inhibitors and catalytical poisoning with examples. 03
2. The pH of a buffer solution containing 0.8 mole/litre of acetic acid and 0.7 mole/litre sodium acetate has been found to be 4.80. What will be the pH of this solution after 0.3 mole/litre HCl has been added to the buffer? Assume that the volume is unchanged. Ka = 1.75 x 10^-5 04
3. Explain intermediate compound formation theory of catalysis with suitable example. 07

OR

1. Give the method of preparation of colloids. 03

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2. Derive relation between free energy and electro motive force. 04
3. Explain heterogeneous catalysis with examples. 07

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