Chemistry CSS Paper I 2022

FEDERAL PUBLIC SERVICE COMMISSION
COMPETITIVE EXAMINATION – 2022
FOR RECRUITMENT TO POST IN BS – 17
UNDER THE FEDERAL GOVERNMENT

CHEMISTRY Paper I

TIME ALLOWED: THREE HOURS
PART – I (MCQs): MAXIMUM 30 MINUTES
PART – I (MCQs): MAXIMUM MARKS = 20
PART – II MAXIMUM MARKS = 80

NOTE:
(i) Part – II is to be attempted on the separate Answer Book.
(ii) Attempt ONLY FOUR questions from PART – II. ALL questions carry EQUAL marks.
(iii) All the parts (if any) of each Question must be attempted at one place instead of at different places.
(iv) Candidate must write Q. No. in the Answer Book in Accordance with Q. No. in the Q. Paper.
(v) No Page / Space be left blank between the answers. All the blank pages of Answer Book must be crossed.
(iv) Extra attempt of any question or any part of the attempted question will not be considered.

PART-II

Q. No. 2. (a) Derive Schrodinger wave equation for particle in one dimensional box. (10)
(b) Discuss tleisenberg’s Uncertainty principle. (05)
(c) What is corrosion? How it can be prevented? (05) (20)

Q. No. 3. (a) What is Stereoisomerism? Discuss it with reference to coordination complexes. (08)
(b) Define and explain Jahn-l-eller theorem. (06)
(c) Write a short note on column chromatography. (06) (20)

Q. No. 4. (a) What is Valence Bond theory? How does this theory explains the structure of inorganic molecules? (08)
(b) Define and explain the phenomenon of resonance in inorganic compounds. (06)
(c) Write some general characteristics of actinides. (06) (20)

Q. No. 5. (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) (20)

Q. No. 6. (a) What are electrun-deficient compounds? Discuss bond in such compounds. (07)
(b) Define and explain the VSEPR model to explain the geometry of inorganic substances. (07)
(c) Discuss variation in oxidation states of lanthanides. (06) (20)

Q. No. 7. (a) What is Nernst equation? Explain It. (08)
(b) Define and explain Kohlrausches’a law. (07)
(c) Write a short note on Arrhenius equation. (05) (20)

Q. No. 8. (a) What is crystal field theory? How does this theory explain the geometry of complexes? (08)
(b) Explain Lewis theory of acids and bans. (06)
(c) Write a short note on thin layer chromatography. (06) (20)


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