CSS Chemistry Past Paper 2022

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. 220 marks

   (a) Derive Schrodinger wave equation for particle in one dimensional box. (10) (b) Discuss Heisenberg’s Uncertainty principle. (05) (c) What is corrosion? How it can be prevented? (05)

2. Q. 320 marks

   (a) What is Stereoisomerism? Discuss it with reference to coordination complexes. (08) (b) Define and explain Jahn-Teller theorem. (06) (c) Write a short note on column chromatography. (06)

3. Q. 420 marks

   (a) What is Valence Bond theory? How does this theory explains the structure of (08) inorganic molecules? (b) Define and explain the phenomenon of resonance in inorganic compounds. (06) (c) Write some general characteristics of actinides. (06)

4. Q. 520 marks

   (a) What is photoelectric effect? How quantum mechanics explains this effect? (08) (b) What is wave-function? Discuss its interpretation given by Born. (06) (c) What are fuel cells? Discuss their working with suitable examples. (06)

5. Q. 67 marks

   (a) What are electron-deficient compounds? Discuss bond in such compounds. (b) Define and explain the VSEPR model to explain the geometry of inorganic (07) substances. (06) (20) (c) Discuss variation in oxidation states of lanthanides.

6. Q. 720 marks

   (a) What is Nernst equation? Explain it. (08) (b) Define and explain Kohlrausches’s law. (07) (c) Write a short note on Arrhenius equation. (05)

7. Q. 88 marks

   (a) What is crystal field theory? How does this theory explain the geometry of complexes? (06) (b) Explain Lewis theory of acids and bases. (06) (20) (c) Write a short note on thin layer chromatography.

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.