ENGINEERING CHEMISTRY-II
Question Bank
UNIT-I
Electrochemistry
2 Marks
1. Define electrode potential or single electrode potential?
2. Define (i) oxidation potential
(ii) reduction potential
3. What are the factors affecting reduction potential?
4. What is the standard electrode potential?
5. Write the Nernst equation for
(i) Oxidation potential
(ii) Reduction potential
6. Zinc reacts with dil.H2SO4 to give hydrogen but Ag does not explain.
7. Define Helmholtz electrical double layer?
8. Suggest a method of determine the electrode potential of zinc.
9. What is potential of a lead electrode when is it contact with a
solution of 0.02 M in Pb2+ ions?
10. What is electrode potential? How it is developed?
11. Mention the application of Nernst equation?
12. Write the relationship, which relates the free energy changes and
Equilibrium constant?
13. Describe the construction of glass electrode. How is it
significant applications?
14. Write the construction of standard calomel electrode?
15. What are the advantages of glass electrode?
16. What are the reference electrodes? Give example?
17. What are the advantages of quinhydrone electrode?
18. Define electrochemical series. What are its significance?
19. What are cells? Give examples?
20. What are electrolytic cells?
21. What are electrochemical cells or Galvanic cells?
22. Write any two differences between electrolytic cells and
electrochemical cells?
23. What is salt bridge? Give its function?
24. What are concentration cells? Give its type?
25. Write a note on
(i) Electrode concentration cells
(ii) Electrolytic concentration cells
(iii) Electrode concentration cells
26. Write the application of concentration cells?
27. Define emf of a cell?
28. Write the Nernst equation for emf of a Daniel cell?
29. Give the application of emf measurements?
30. What are the conductometric titrations? (or) Give the application
of conductometric titrations?
31. Write the relationship between emf and spontaneity?
32. Define the term "single electrode potential" and "standard
Electrode potential"?
Part - B
1. What are galvanic cells and concentration cells?
2. Define (a) electrode potential (b) electrochemical cell
3. Write a note on concentration cells?
4. Derive the expression for the emf of a cell?
5. How is calomel electrode constructed? Discuss how this electrode may be used for determination of pH of a solution?
6. Define the term single electrode potential. Derive Nernst equation and give its applications?
7. Define emf? How is emf of a cell measured by potentiometric method?
8. What are reversible cells irreversible cells?
9. What are electrochemical series? What are its applications?
10. What are concentration cells? Explain any two applications of the same?
11. Define a reference electrode? Give one example?
12 How are electrode potentials experimentally determined? Distinguish between single electrode potential and standard electrode potential?
13. Describe the construction and working of Daniel cell?
14. Distinguish between reversible and irreversible cells giving one example for each?
15. Given an example for a metal-metal insoluble salt electrode. Describe the construction and working of the electrode?
16. Explain the determination of pH of an aqueous solution using glass electrode?
17. Write an account on potentiometric titrations?
18. Distinguish between electrochemical cell and electrolytic cell?
19. How is single electro potential measured by using SCE?
Unit II
Corrosion and its Inhibitors
1. Define corrosion.
2. Distinguish between Dry and wet corrosion.
3. State pilling-Bedworth rule or ratio.
4. What is galvanic cell corrosion?
5. What is electrochemical corrosion?
6. What is sacrificial anode?
7. What is hydrogen embrittlement?
8. What is decarburization?
9. Write a note on water-line corrosion?
10. Mention the various factors influencing the rate of corrosion.
11. What are corrosion inhibitors?
12. What are metallic coatings?
13. What are paints?
14. What is the role of pigment in paint?
15. Explain the function of driers in the paint?
16. What is the function of extender in paint?
17. What are drying oils?
18. How do paint differ from vanishes?
19. What is the mechanism of drying of oil paint?
20. What are fire retardant paints?
21. What are water repellent paints?
22. What are temperature indicating paints?
23. What are the objectives of electroplating on non-metals?
24. Write a note on copper plating?
25. What is galvanising and tinning?
26. What is anodising?
27. What is hot dipping?
28. What is electro less plating?
29. What are the advantages and disadvantages of electro less plating?
Unit III
Fuels
1. Write briefly on the ranking of coal.
2. What are the characteristics of good quality coal?
3. What is meant by the term fixed carbon?
4. What is metallurgical coke?
5. Give the characteristics of metallurgical coke.
6. What is meant by hydrogenation of coal?
7. Define knocking?
8. Define octane number of the petrol.
9. What is doping of petrol?
10. What is the use of TEL?
11. Define diesel knock.
12. Define cetane number.
13. Write the composition of
(a) Water gas
(b) Producer gas
(c) Carburetted water gas
(d) CNG
14. What are the advantages of CNG?
15. Write Dulong’s formula.
16. What is flue gas?
17. What are the uses of flue gas analysis?
18. Distinguish between GCV and NCV.
19. What is carbonisation?
20. What are the characteristics of metallurgical coke?
21. What is meant by refining of petroleum?
22. Define cracking?
23. What is sour petrol?
24. What is meant by hydrogenation of coal?
25. Define octane number of petrol.
26. What are the advantages and disadvantages of leaded petrol?
27. Define cetane number of diesel.
28. Differentiate between petrol and diesel.
29. What are the advantages and disadvantages of liquid fuels?
30. What is aviation gasoline?
31. Give the composition of LPG and water gas.
32. What is LPG? Give its chemical composition?
Combustion
1. Define calorific value of fuel.
2. Define GCV and LCV of a fuel.
3. Name the important units of calorific value.
4. What are the factors, which influence the rate of combustion?
5. Give the Dulong’s formula for the calculation of GCV and NCV.
6. What are the reagents used in flue gas analysis?
7. Name the reagents used for absorbing CO2, O2 and CO during flue gas analysis by Orsat apparatus.
8. Mention the uses of flue gas analysis.
Unit V
Analytical techniques
1. What is Beer-lamberts law?
2. Write the application of Beer-lamberts law.
3. What are the disadvantages of Beer-lamberts law?
4. Name the factors which affect the absorbance?
5. How does molecular spectrum arise?
6. What is calorimeter?
7. Name the important components of calorimeter components.
8. Write the application of calorimetry.
9. What is flame photometry?
10. What are the limitations of flame photometry?
11. Define Chromophores.
12. What are auxochromes?
13. What are finger print region?
14. What are the various types of electronic transitions?
15. What are the limitations of Beer-Lambert’s law?
16. Write the applications of UV – visible spectroscopy.
17. Give any two application of IR spectroscopy.
18. Explain the principle of Flame photometry?
19. What is the wavelength ranges of UV, IR and visible regions.
20. Convert the following absorbance values to %T?
(a) 32% (b) 54%
21. Calculate the absorbance of 1.03×10-3 M solution, if molar absorptivity=720 and path length = 1 cm.
22. Describe the term
(a) Bathochromic
(b) Hypsochromic
(c) Hyperchromic
23. What are the differences between molecular spectra and atomic spectra?