Q9/15D/04-15 Reg. No

St. Joseph’s College of Arts & Science (Autonomous)

St. Joseph’s College Road, Cuddalore – 607001 PCH1015S – REACTION KINETICS, ELECTRODE KINETICS AND PHOTO CHEMISTRY Time : 3 hrs Max Marks :75 SECTION – A (20X1=20) Answer ALL Questions I. Choose the correct answer

Reaction kinetics, Electrode kinetics and Photo chemistry PCH1015S Semester-IV – (set-2) Time : 3 hrs Max Marks :75 SECTION A (20x1=20) Answer ALL questions: I Choose the Correct Answer (10x1=10 marks) 1. Which is Brønsted catalysis equation for acid catalysis? a) log k =  logKa + C b) log 1/k =  logKa + C c) log k =  2 log1/Ka + C d) log k =  logKa - C 2. Which equation is used to relate rate and free energy of activation? a) Einstein b) Henderson c) Gibb’s d) Eyring 3. Using Langmuir isotherm, under high pressure, the extent of adsorption is a)  1/P b)  P c)  2 P d) independent of pressure

~1~

Q9/15D/04-15 4. Dehydration of 2-methyl-2-butanol is an example for a) higher order reaction b) complex reaction c) simple reaction d) elementary reaction 5. Which of the following 0.01M solution will have greater ionic strength a) Al2(SO4) b) NaCl c) K2SO4 d) CaCl2 6. In Debye–Hückel limiting law, the activity coefficient is inversely proportional to a) charge number of ion species b) elementary charge c) Avogadro's number d) temperature of the solution 7. Which transition is spin-forbidden? a) vibrational relaxation b) inter system crossing c) fluorescence d) all the above 8. Relaxation of the excited state to its lowest vibrational level is called a) inter system crossing b) vibrational relaxation c) fluorescence excitation d) electron excitation 9. The electromagnetic radiation used in radiation chemistry is a) x-rays only b) UV-rays only c) visible rays only d) X- or -rays 10. The quantum yield for H2-CI2 photochemical reaction varies between a) 104-106 b) 10-4-10-6 c) 101-102 6 9 d) 10 -10

~2~

Q9/15D/04-15 II Fill in the blanks (5X1=5 marks) 11. Enthalpy, Entropy and free energy of activation are related as _________ 12. Effect of temperature on reaction rate is given by ___________theory 13. Hydrolysis of diester is an example for ______________ reaction. 14. An example for photo-physical phenomenon is _______. 15. ______ junction is used in photovoltaic cell. III. Match the following = 5 marks) 16. Guoy-Chapman adsorption 17. BET adsorption 18. Fast reaction 19. Light intensity 20. Fluorescence

(5x1 Multi-molecular Actinometry Light emission electrical double layer Stopped flow method

Section-B (10 X 2 = 20 marks) Answer any TEN questions 21. Write eyring equation relating enthalpy and entropy of activation. 22. What is kinetic isotopic effect? 23. What is flammability limits? 24. Write about flash photolysis. 25. Calculate the ionic strength of 0.15molal NaCl solution. 26. Define activity and activity co-efficient. 27. Write quantum yield and any two examples for phosphorescence. 28. What are excimers and exciplexes 29. Write any two characteristics of hydrated electron. 30. Give an example for photo-isomerization reaction. 31. Draw BET plot for adsorption. 32. Show schematic graphical representation for stern model.

~3~

Q9/15D/04-15 Section –C (5 X 7 = 35 marks) Answer any FIVE questions 33. a) Write the rate constant, as per collision theory of reaction rate. (2) b) For a reaction, if the Ea is 205.8 kJ/mol and rate constant is 1.33 X 10-4 s-1 at 127C. Calculate the standard entropy of activation. (3) c) Write is Brønsted catalysis law for acid and base catalysis. (2) 34. a) Derive Langmuir adsorption isotherm. (3) b) Draw Langmuir’s plot for the kinetics of gaseous reaction on solids. (2) c) Explain the kinetics of parallel reaction (2) 35. a) Write briefly about Guoy-Chapman diffuse charge model of double layer (3) b) Calculate the mean ionic activity coefficient of 0.001molal K2SO4. (2) c) Calculate ionic strength for 0.2 molal solution of barium chloride. (2) 36. a) Derive Stern-Volmer equation. (3) b) Draw the jablonski diagram for fluorescence . (2) c) Calculate the quantum yield, if 1.3 moles of reactant undergo photochemical change on interacting with 0.13 einsteins of visible light. (2) 37. a) Give an example for photo-substitution reaction. (2) b) What is G-value? (2) c) Write about photo-assisted electrolysis of water. (3) 38. a) How to study fast reaction using pressure jump method. (3)

~4~

Q9/15D/04-15 b) How dielectric constant affect the rate of reactions in solution. (2) c) What is collision frequency? (2) 39. a) What is meant by elastic and inelastic collisions? (2) b) Write the rate equation for H2-Cl2 and H2-Br2 photochemical reactions. (2) c) A sample of gaseous HI was irradiated by light of wavelength 260 nm, when 400 J of energy was found to decompose 2.1 X 10-3 mole of HI. Calculate the quantum yield of HI. (3) II. Fill up the blanks III. Match the following SECTION – B (10X2=20) Answer any TEN Questions

SECTION - C (5X7=35) Answer any FIVE Questions

***********

~5~

Reaction Kinetics, Electrode Kinetics And Photo Chemistry - 04 15 ...

Give an example for photo-isomerization reaction. 31. Draw BET ... Displaying Reaction Kinetics, Electrode Kinetics And Photo Chemistry - 04 15.pdf. Page 1 of 5.

124KB Sizes 1 Downloads 322 Views

Recommend Documents

Reaction Kinetics , Electrode Kinetics And Photo Chemistry - 04 16 ...
a) Stern b) Helmholtz ... b) H2 c) H2O2 d) All the above. II. Match the following. 11. Plot of 1. log Vs k. T. is a)J=Lx. 12. ... Explain stern-volmer analysis. 33. ... Displaying Reaction Kinetics , Electrode Kinetics And Photo Chemistry - 04 16.pdf

Kinetics and Reaction Mechanisms.pdf
k) Explain mean Tree path. l) What are oscillatory chemical reactions ? Give an example. 2. a) Explain the effect of dielectric constant on the rates of chemical ...

Reaction Kinetics Notes Worksheet Blank 1.pdf
Page 1 of 1. Reaction Kinetics Notes Worksheet Blank 1.pdf. Reaction Kinetics Notes Worksheet Blank 1.pdf. Open. Extract. Open with. Sign In. Main menu.

Kinetics of the CH3O2 + NO Reaction: Temperature ...
other channel 4a product, CH3O, and again applying mass. * Corresponding author. E-mail: [email protected]. Phone: (616) 395-. 7629. Fax: (616) 395-7118.

HUMAN KINETICS AND HEALTH EDUCATION.pdf
Page 1 of 1. HUMAN KINETICS AND HEALTH EDUCATION. CourseCode CourseTitle Course Unit Division. KHE 310 Curriculum Development in Human Kinetics 3 First. KHE 401 Skills Development & Tech. in Swimming 3 First. KHE 402 Skills Development & Tech. in Cri

Accelerated Chemical Kinetics in the EMAC Chemistry ...
the Kinetic Pre Processor (KPP) general purpose open-source software tool used .... developed in C and Python and will be contributed upstream to the EMAC ...

Kinetics Review Sheet Warren.pdf
3. Page 3 of 8. Kinetics Review Sheet Warren.pdf. Kinetics Review Sheet Warren.pdf. Open. Extract. Open with. Sign In. Main menu. Displaying Kinetics Review ...

KINETICS 02 ZINC CORROSION.pdf
KINETICS 02 ZINC CORROSION.pdf. KINETICS 02 ZINC CORROSION.pdf. Open. Extract. Open with. Sign In. Main menu. Displaying KINETICS 02 ZINC ...

Basic-Enzyme-Kinetics-derivations.pdf
Connect more apps... Try one of the apps below to open or edit this item. Basic-Enzyme-Kinetics-derivations.pdf. Basic-Enzyme-Kinetics-derivations.pdf. Open.

Kinetics Review Worksheet 1.pdf
There was a problem previewing this document. Retrying... Download. Connect more apps... Try one of the apps below to open or edit this item. Kinetics Review ...

Kinetics Equilibrium Practice Test Answers.pdf
Kinetics Equilibrium Practice Test Answers.pdf. Kinetics Equilibrium Practice Test Answers.pdf. Open. Extract. Open with. Sign In. Main menu. Displaying ...

Kinetics Quiz Feb 2017.pdf
There was a problem previewing this document. Retrying... Download. Connect more apps... Try one of the apps below to open or edit this item. Kinetics Quiz ...

Kinetics of Hydrogen Peroxide Decomposition.pdf
Kinetics of Hydrogen Peroxide Decomposition.pdf. Kinetics of Hydrogen Peroxide Decomposition.pdf. Open. Extract. Open with. Sign In. Main menu. Displaying ...

Thermodynamics versus Kinetics in ... - Wiley Online Library
Dec 23, 2014 - not, we are interested in the kinetic barrier and the course of action, that is, what prevents the cell phone from dropping in the first place and what leads to its ..... by the random collision of the monomer species are too small to

Phase Equilibria & Kinetics (1).pdf
26. Describe any three methods to determine order of reaction. 27. Explain opposing, consecutive and parallel reactions in detail with. suitable examples. 28. Derive Michaelis – Menton equation and discuss the kinetics of enzyme catalysis. ********

Download Concepts of Modern Catalysis and Kinetics ...
7 days ago - Download Concepts of Modern Catalysis and Kinetics Full Books ... Reflecting the modern-day focus on energy ... (Angewandte Chemie - I. E.).

Kinetics-AP Practice Problems.pdf
Whoops! There was a problem loading more pages. Retrying... Kinetics-AP Practice Problems.pdf. Kinetics-AP Practice Problems.pdf. Open. Extract. Open with.