Firstranker's choice
GUJARAT TECHNOLOGICAL UNIVERSITY
--- Content provided by FirstRanker.com ---
BE - SEMESTER-VII(NEW) EXAMINATION - SUMMER 2019
Subject Code:2172602/2172607 Date:14/05/2019
Subject Name:Polymer Kinetics
Time:02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
--- Content provided by FirstRanker.com ---
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
Q.1 (a) With suitable example, explain non elementary reaction. [03]
(b) Compare collision theory with transition state theory. [04]
--- Content provided by FirstRanker.com ---
(c) Discuss in detail about the factors affecting rate of reaction. [07]
Q.2 (a) Give the classification of reactor based on it’s operation. [03]
(b) Differentiate the molecularity and order of reaction. [04]
(c) For gas phase decomposition of azomethane (CH3)2N2 ? C2H6 + N2. The rate expression is r = k1*Caz0 / 1+k’*Cazo. Devise mechanism to explain this rate. [07]
OR
--- Content provided by FirstRanker.com ---
Q.2 (c) Decomposition of acetone dicarboxylic acid is first order reaction CO(CH2COOH)2 ? CO(CH3)2 + 2CO2. Following is data for the same:
T,K 273 293 313 333
Ki(s)-1 2.46x10-6 47.5x10-6 576x10-6 5480x10-6
Find out the energy of activation for this reaction graphically. [07]
Q.3 (a) Explain the term space time with suitable example. Also give it’s unit. [03]
--- Content provided by FirstRanker.com ---
(b) Decomposition of gas is second order reaction. When initial concentration of gas is 5*10-4 mole/liter it is 40% decomposed in 50 minutes. Calculate the value of rate constant. [04]
(c) Derive the performance equation of ideal Continuous Stirred Tank Reactor (CSTR) for first order variable volume system. [07]
OR
Q.3 (a) Derive the integral rate equation for nth reaction. [03]
(b) Explain the term space velocity with suitable example. Also write it’s unit. [04]
--- Content provided by FirstRanker.com ---
(c) Derive the performance equation for ideal Plug Flow Reactor (PFR) for first order variable volume system. [07]
Q.4 (a) Explain the term ‘chain Modifier’. [03]
(b) Write a note on ‘Ceiling Temperature’. [04]
(c) Discuss the kinetics of the cationic polymerization. [07]
OR
--- Content provided by FirstRanker.com ---
Q.4 (a) Define the term ‘chain transfer constant’. List the factors affecting it. [03]
(b) What do you mean by ‘Mayo Equation’? Give it’s application. [04]
(c) Discuss the kinetics of anionic polymerization. [07]
Q.5 (a) Explain the term ‘telomerization’. [03]
(b) Which principles are adopted to achieve the narrow composition distribution in case of copolymerization. [04]
--- Content provided by FirstRanker.com ---
(c) Discuss the viscometry method to determine the molecular weight of polymer. [07]
OR
Q.5 (a) What do you mean by kinetic chain length? Give it’s relationship with degree of polymerization. [03]
(b) Which conclusions can be drawn regarding to kinetics of free radical polymerization? [04]
(c) Discuss the ultracentrifugation method to determine the molecular weight of polymer. [07]
--- Content provided by FirstRanker.com ---
FirstRanker.com
Firstranker's choice
--- Content provided by FirstRanker.com ---
This download link is referred from the post: GTU BE 2019 Summer Question Papers || Gujarat Technological University