Name of the University : Mahatma Gandhi University
Department : Chemistry
Degree : M.Sc Chemistry
Subject Code/Name : CH3C11/Chemical Kinetics, Surface Chemistry And Photochemistry
Sem : III
Website : mgu.ac.in
Document Type : Model Question Paper
Download Model/Sample Question Paper : https://www.pdfquestion.in/uploads/mgu.ac.in/5111-III%20CH.pdf
MGU Chemical Kinetics Question Paper
Model Question Paper :
Time : 3 Hrs
Max. Weight: 30
Related : MGU AP3C10 Chemistry & Biochemistry of Fatty Acids M.Sc Model Question Paper : www.pdfquestion.in/5110.html
Section A
(Answer any 10questions. Each question carries a weight of 1)
01. Define steric factor. Explain how is it related to entropy of activation.
02. Explain with an example how NMR can be used in the study of fast reactions.
03. Compare transition state theory with collision theory.
04. Discuss primary kinetic salt effect.
05. What is cage effect?
06. Explain the mechanism of addition polymerization.
07. Discuss the effects of pH and temperature on catalysis.
08. Distinguish between excimers and exciplexes.
09. What is meant by photostationary state? Discuss with reference to formation of ozone in the atmosphere.
10. Explain green house effect.
11. What are micelles?
12. Define zeta potential.
13. Explain the principle of photoelectron spectroscopy.
(10×1=10 weights)
Section B
(Answer 5 questions by attempting not more than 3 questions from each bunch. Each question carries a weight of 2)
Bunch 1 : (Short Essay Type)
14. What are explosive reactions? Explain the mechanism with a suitable example.
15. Derive Michelis-Menten equation.
16. Illustrate Rice-Herzfeld mechanism with thermal decomposition of acetaldehyde.
17. Discuss the principle of Surface Enhanced Raman scattering.
Bunch 2 : (Problem Type)
18. A second order reaction has a rate constant k = 2.5 x 10-3 L mol-1 S-1 at 25°C. Its energy of activation is 48 kJ mol-1. Calculate ?S? for the reaction, assuming that the reaction takes place in solution. 6
19. For a homogeneous gaseous reaction the rate constants are 3.0 x 10-5 L mol-1 S-1 and 1.2 x 10-3 L mol-1 S-1 at 629 and 700K respectively. Calculate the energy of activation and frequency parameter.
20. In a photochemical reaction A ? 2B + C the quantum efficiency with 500 nm light is 2.1 x
102 mol Einstein-1. After exposure of 300 m mol of A to the light 2.28 m mol of B was formed. How many photons were absorbed by A?
21. In an experiment to measure quantum efficiency of a photochemical reaction, the absorbing substance was exposed to 490 nm light from a 100W source for 45 minutes. The intensity of transmitted light was 40% of the intensity of the incident light. As a result of irradiation, .344 mol of the absorbing substance decomposed. Determine the quantum efficiency. (5 x 2 =10 weights )
Section C
(Answer any 2 questions. Each question carries a weight of 5)
22. a) Explain the BET theory of adsorption.
b) Discuss the use of Langmuir and BET isotherms for surface area determination.
23. a) Explain the principles of ESCA and Auger electron spectroscopy.
b) Discuss the applications of SEM and TEM in the study of surfaces.
24. a) Distinguish between E-type and P-type delayed fluorescence.
b) Discuss the working of solar cells.
c) Discuss the applications of LASER in the study of photochemical kinetics.
25. a) Derive an expression for the formation of HBr.
b) Discuss the factors affecting reactions in solution. (2 x 5 =10 weights)
Mahatma Gandhi University :
CBCSS B.A/B Sc / B.Com Programmes 2011 :
Fifth Semester :
Core Course : CH5B04 – Quantum Mechanics and Spectroscopy
Model Question Paper :
Time : Three hours
Total weightage : 25
Section A : (Answer all questions. Each bunch of four questions carries a weightage of 1)
I. Fill up the blanks :
1. Davisson and Germer experiment illustrates ———– nature of electron
2. A 3p orbital has ———– radial nodes
3. The frequencies of radiations emitted in fluorescence are —– than that of the incident radiation
4. A diatomic molecule executing simple harmonic oscillation obeys —— law
II 5. How many signals are there in the PMR spectrum of neopentane?
6. A compound shows a PMR peak at 240Hz downfield from the TMS peak in a spectrometer operating at 60MHz.What is the chemical shift in ppm?
7. Which among the following molecule is IR inactive but Raman active?
(a) HCl; (b) N2; (c) SO2; (d) CH4
8. Name the spectroscopic technique used in molecular mass determination.
III 9. What is commutator operator?
10. Which among the following is a chromophore? –OH ; -N=N- ; NH2 ; OR
11. Which absorbs at higher frequency,OH or CO group?.
12. What is the range of frequencies covered by pure rotational spectra?