Engineering Chemistry II - Model question paper II

                             Model question paper

                          Engineering chemistry II

                   Second semester (Regulation 2008)

                             Answer all the questions

                             Part – A (10×2=20 marks)

1. Write the emf values of calomel electrode.

2. What are the advantages of conduct metric titration?

3. State Pilling-Bedworth rule.

4. Mention the functions of vehicle in paint.

5. Expand LPG. Mention its uses.

6. Define octane number.

7. Explain component.

8. What are the uses of bronze?

9. State Beer Lambert’s law.

10. What is finger print region?

                             Part-B (5×16=80 Marks)

11. a) i) How is the emf of a cell determined?

         ii) Calculate the emf of the reaction.

          Zn —> Zn²⁺ _(0.05M) + 2e^-   at 25^oC

          E^o ( Zn²⁺, Zn ) = -0.76 V

                             Or

b) i) The emf of the cell consisting of a hydrogen electrode and normal calomel electrode is 0.53 V. E_cell = 0.28 V. Calculate the pH of the solution .

         ii) Calculate the emf of the following cell at 25^oC.

                 Cu | Cu²⁺ _{0.01 M}  || Cu²⁺ _{0.01 M} | Cu

12. a) i) Sketch and explain the potentiometric titration of Fe²⁺ Vs KMnO_4.

                                                          Or

     b) i) How will you determine  the pH of a solution using glass electrode?

        ii) What are the applications of electrochemical series?

13. a) i) Discuss different corrosion inhibitors.

         ii) Describe electroless nickel plating.

        iii) Explain Pourbaix diagram.

                                      Or

    b) i) Explain galvanic corrosion.

       ii) Discuss the mechanism of drying oils.

      iii) What is galvanisation?

14. a) i) Calculate the gross and net calorific value of coal having the following compositions.

          C-85%;       H-8%;         S-1%;                   N-2% ;         Ash-4%

        ii) Describe the manufacture of gasoline by Bergius method.

       iii) Explain flue analysis.

                             Or

   b) i) What are the characteristics of good metallurgical coke?

      ii) Explain catalytic cracking.

     iii) Write in brief on CNG.

15. a) i) Explain water system.

         ii) Discuss any two heat treatment methods.

        iii) Write in brief on Nichrome.

                             Or

    b) i) Explain condensed phase rule.

        ii) Describe pattinson process.

       iii) Distinguish electric point from melting point.

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