CHEMISTRY – 2003, PAPER- I, SECTION A

               Time Allowed:   Three Hours      Maximum marks: 200

Candidates should attempt Questions 1 and 5 which are compulsory and any THREE of the remaining questions selecting at least ONE question from each Section. Assume suitable data. If considered necessary, and indicate the same clearly.

SECTION A

1.       Answer any four of the following:

(a)    Explain the principle of ion selective electrodes. What are their applications?

(b)   What is Born-haber cycle? What is its use?

(c)    What are quantum numbers? What are their significances?

(d)   Write a note on liquefaction of gases.

(e)   What are reverse reactions? Derive the rate equation for reverse reaction.

2.       (a) State phases rule and explain the terms involved draw the phase diagram of a binary system of partially miscible liquids.

          (b) Deduce a pressure- volume relationship in reversible adiabatic expansion of an ideal gas.

3.       (a) What are fuel cells? Describe the constriction and working of a fuel cell?

            (b) Discuss the transition state theory of reaction rates.

4.       (a) Describe the experimental set up for the measurement of emf of a cell.

           (b)  What is an adsorption isotherm? How are Langmuir and BET isotherms obtained?  What are their characteristics?