Engineering Chemistry 2 - Dec 2013

First Year Engineering (Semester 2)

TOTAL MARKS:
TOTAL TIME: HOURS

1 List the important differences between a Galvanic cell and an electrolytic cell.(2 marks) 10 Give the salient features of the technique of differential thermal analysis.(2 marks)

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

11 (a) Describe in detail about primary standard hydrogen electrode and calomel electrode.(16 marks) 11 (b) Elaborate the determination of pH of a solution using glass and a common silver-silver chloride reference electrode.(16 marks)

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

12 (a) With example, explain the concept of differential areation corrosion.(16 marks) 12 (b) List out the methods of protecting metals from corrosion. Discuss on any two important suitable methods.(16 marks)

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

13 (a) Explain the types of petrol cracking.(16 marks) 13 (b) (i) Write briefly about the techniques to prevent knocking.(8 marks) 13 (b) (ii) Explain the methods of prduction of synthetic petrol.(8 marks)

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

14 (a) Elaborate the application of phase rule to one component water system.(16 marks) 14 (b) Explain the single homogeneous phase containing two components lead and silver.(16 marks)

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

15 (a) Explain the working principle of infrared (IR) spectroscopy.(16 marks) 15 (b) Explain with the flow diagram about flame photometer.(16 marks) 2 Calculate the reduction electrode potential of copper when it is in contact with 0.5 m copper sulphate solution at 298 K. The E? value of copper is 0.34 V.(2 marks) 3 Give the mechanism of corrosion by absorption of oxygen.(2 marks) 4 Justify, how corrosion is formed by caustic embrittlement.(2 marks) 5 Calculate the calorific value of a fuel sample of coal with the following data:
(a) Mass of coal: 0.6 g
(b) Water equivalent of calorimeter: 2200 g
(c) Specific heat of water: 4.187 kJ kg^-1 C^-1
(d) Increase in temperature: 6.52°C(2 marks) 6 Write the mechanism of knock in petrol engines.(2 marks) 7 Discuss on degree of freedom with example.(2 marks) 8 Mention about peritectic point in phase diagram of Mg₂SiO₄ - SiO₂(2 marks) 9 State briefly about the working of a calorimeter.(2 marks)