CSS Chemistry Past Paper 2017

Instructions specific to this paper

• Attempt ONLY FOUR questions from PART-II. ALL questions carry EQUAL marks.
• Use of Calculator is allowed.
• Attempt ONLY FOUR questions from PART-II. ALL questions carry EQUAL marks.

Questions

1. Q. 24 marks

   (a) Derive Schrodinger wave equation for motion of a particle in one dimensional (10) box. (b) Solve Schrodinger wave equation to find the expression for wave function (6) energy of a particle in one dimensional box. (c) What is Eigen function and Eigen value? Give examples.

2. Q. 34 marks

   (a) Define heat capacities and molar heat capacities. Prove that C p-Cv=R for ideal (10) gases. (b) What is Gibbs energy? Derive a relation between standard Gibbs energy change (6) and equilibrium constant. (c) Differentiate spontaneous and non spontaneous process.

3. Q. 44 marks

   (a) State and explain Kohlrausch’s law. Give its applications. (10) (b) What is meant by standard deviation? Give its significance in analytical (6) chemistry. (c) Briefly describe conductometric titrations.

4. Q. 510 marks

   (a) Discuss the effect of temperature on rate of chemical reaction on the basis of Arrhenius equation. How can you determine activation energy and pre-exponential factor for a chemical reaction using Arrhenius equation? (b) Derive kinetic equation for 1st order reaction. (6) (c) Prove that half life period for 1st order reaction is independent of initial (4) concentration of reactant.

5. Q. 64 marks

   (a) What is adsorption isotherm? Derive Langmuir adsorption isotherm for (10) adsorption of a gas on solid surface. (b) What is enzyme catalysis? Discuss its kinetics. (6) (c) What are surfactants? Give their properties.

6. Q. 74 marks

   (a) What is electrophoresis? Give its principle and discuss its applications in (10) biochemistry. (b) Give six chemical properties of nitrogen. (6) (c) What is Common ions effect? Give its applications.

7. Q. 84 marks

   (a) State John-Teller theorem. Explain it using suitable examples from coordination (10) complexes. (b) Give postulates of Werner’s theory of coordination complexes. (6) (c) Briefly describe nuclear decay rate law for disintegration of radioactive elements.

Standard FPSC instructions

Printed on this and every CSS paper.

• Part-II is to be attempted on the separate Answer Book.
• All the parts (if any) of each question must be attempted at one place instead of at different places.
• Write Q. No. in the Answer Book in accordance with Q. No. in the question paper.
• No page/space be left blank between the answers. All the blank pages of the Answer Book must be crossed.
• Extra attempt of any question or any part of the attempted question will not be considered.