Engineering Chemistry 1 - Dec 2013

First Year Engineering (Semester 1)

TOTAL MARKS:
TOTAL TIME: HOURS

1 What is meant by degree of polymerization?(2 marks) 10 What is laser ablation?(2 marks)

Answer any one question from Q11. (a) & Q11. (b)

11.(a)(i) Discuss cationic polymerization mechanism in detail.(8 marks) 11.(a)(ii) Distinguish thermoplastics and thermosetting plastics.(8 marks) 11.(b)(i) Explain any four properties of polymer in detail(8 marks) 11.(b)(ii) Discuss the preperation, properties and uses of Nylon 6.6(8 marks)

Answer any one question from Q12. (a) & Q12. (b)

12.(a)(i) Derive Gibbs-Helmholtz equation and explain (8 marks) 12.(a)(ii) Compute free energy change when 5 moles of an ideal gas expands reversibly and Isothermally at 300 K from an initial volume of 50 L to 1000 L.(8 marks) 12.(b)(i) What meant by Vant Hoff's reaction isotherm? Derive the expression for a reaction isotherm of the general reaction:
aA+bB ⇄cC+dD.(8 marks) 12.(b)(ii) Discuss the criteria for chemical reaction to be spontaneous.(8 marks)

Answer any one question from Q13. (a) & Q13. (b)

13.(a)(i) State and explain the laws of Photochemistry in detail.(8 marks) 13.(a)(ii) Explain the principle and instrumentation of UV-Visible spectroscopy with neat block diagram.(8 marks) 13.(b)(i) Explain the principle and instrumentation of IR spectroscopy with a neat block diagram.(8 marks) 13.(b)(ii) Discuss
(i) Florescence and
(ii) Phosphorescence in detail(8 marks)

Answer any one question from Q14. (a) & Q14. (b)

14.(a)(i) Draw a neat one component water system and explain in detail.(8 marks) 14.(a)(ii) Discuss the heat treatment of steel in detail.(8 marks) 14.(b)(i) Draw a neat zinc - magnesium system and explain in detail.(8 marks) 14.(b)(ii) Discuss composition, properties and uses of any two non-ferrous alloys.(8 marks)

Answer any one question from Q15. (a) & Q15. (b)

15.(a)(i) How are carbon nonotubes are synthesised? Explain in detail.(8 marks) 15.(a)(ii) Distinguish molecules, nanoparticles and bulk materials.(8 marks) 15.(b)(i) Discuss various types of synthesis involved in the preparation nanomaterials.(8 marks) 15.(b)(ii) Explain
(i) nano cluster
(ii) nanowire with example.(8 marks) 2 Mention any two uses of epoxy resin.(2 marks) 3 Calculate the entropy change for the reversible isothermal expansion 10 moles of an ideal gas to 50 times its original volume at 298k.(2 marks) 4 Define entropy for an ideal gas.(2 marks) 5 What is chemiluminescence?(2 marks) 6 What is meant by absorption of radiation?(2 marks) 7 What are alloys?(2 marks) 8 What is condensed Phase rule?(2 marks) 9 What are carbon nano tubes?(2 marks)