Anna University Chennai B.E Engineering Chemistry Model examination- may 2010 Question paper

MODEL EXAMINATION- MAY 2010
B.Tech / B.E DEGREE EXAMINATION
II SEMESTER
CY 2161 ENGINEERING CHEMISTRY-II

PART-A(10 x 2 =20 Marks)

1. What are reversible and irreversible cells?

2. Calculate the emf of the following cell at 25celcius.
Zn(s)/Zn^2+ (0.1M) // Cu^2+ (1.75M)/Cu(s).Given that EoZn^2+/Zn = -0.76V and EoCu^2+/Cu=0.34V.

3. What is pilling-bedworth ratio?

4. What is pitting corrosion?

5. Give the composition and use of producer gas?

6. Define GCV & LCV of a fuel?

7. What is alnico?

8. State beer-lambertz law?

10. A solution shows a transmission of 20% when taken in a cell of 2.5cm thickness. Calculate its concentration if the molar absorption coefficient is 12,000
dm^3mol^-1cm^-1.

PART B-(5 X 16=80)

11.i. define the term single electrode potential. Derive Nernst equation and give its applications.
ii. Discuss the construction and working of glass electrode?
Discuss how this electrode may be used for the determination of ph of a solution.

Or

12. i.. explain acid-base titration conductometrically.
ii. Calculate the concentration of H+ in the following cell.
Pt, H2 (P=1 atm) / H+(c=?)/H2 (P=1 atm)/Pt.Ecell=0.118 V at 25 Celsius.


13.i. explain the mechanism of hydrogen evolution and oxygen absorption in electrochemical corrosion. Illustrate with suitable diagrams.
ii. Explain how sacrificial anode and impressed current methods control corrosion.

Or

14.i. what is electro less plating? How is electro less Ni plating carried out?
ii. What is paint? What are the constituents and functions of paints?

15.i. what is proximate analysis of coal? How is it carried out?.
ii. Write short notes on petrol knock and diesel knock

Or

16.i. discuss in detail the moving bed catalytic cracking.
ii. How the flue gas analysis is carried out? Explain with neat diagram.

17.i. discuss with a neat diagram and explain the Pb-Ag system. Briefly write about Pattinson's process..
ii. What is thermal analysis? Draw the cooling curve of a pure substance and a mixture. Discuss.

Or

18.i. describe the phase diagram of one component system.
ii. Describe the various processes in heat treatment of steel.

19.i. discuss the principle and instrumentation in atomic adsorption spectroscopy.
ii. How wily you estimate sodium by flame photometry?

Or

20.i. explain the various components and working of UV-visible spectrophotometer.
ii. Discuss the applications of IR spectroscopy with examples.