PUNJAB PUBLIC SERVICE COMMISSION
Combined Competitive Examination (CCE) 2022
For Recruitment to the Posts of Provincial Management Service (PMS)
SUBJECT: Chemistry (Paper-I)
Time Allowed: 3 Hours
Maximum Marks: 100
Note: Attempt any five questions in all. Attempt in Urdu or English.
Q. No. 1
a) Define entropy. Describe entropy changes and conclusions for reversible and irreversible processes. (2 + 4 + 4 = 10 Marks)
b) Explain the significance of Gibbs free energy as useful work. (10 Marks)
Q. No. 2
a) What is hybridization of orbitals? Compare sigma (σ) and pi (π) bonds. Explain sp³d hybridization. (2 + 4 + 4 = 10 Marks)
b) Write the main points of Molecular Orbital Theory (MOT) and explain the structure of HF molecule. (5 + 5 = 10 Marks)
Q. No. 3
a) What is molar conductance? How are conductance and resistance measured? (2 + 8 = 10 Marks)
b) Define electrode potential. Explain the standard hydrogen electrode. (2 + 8 = 10 Marks)
Q. No. 4
a) What is Pauli Exclusion Principle? How does it help in the distribution of electrons in an atom? (10 Marks)
b) Derive the Schrödinger wave equation using the Laplacian operator. (10 Marks)
Q. No. 5
a) What are the main postulates of Werner’s theory? Explain the structure of CoCl₃·6NH₃. (7 + 3 = 10 Marks)
b) What are chelates? Give their classification and examples of chelate formation. (2 + 2 + 6 = 10 Marks)
Q. No. 6
a) What is radioactive decay? Describe the decay of beta (β⁺, β⁻) particles. (2 + 8 = 10 Marks)
b) Differentiate between nuclear fission and nuclear fusion processes. (10 Marks)
Q. No. 7
a) What is the composition of cement? Describe the wet process for the manufacture of cement. (10 Marks)
b) Define fertilizers and explain their classification. (2 + 8 = 10 Marks)
Q. No. 8
a) What are pollutants? How can air pollution be controlled? (10 Marks)
b) Write a note on any one: (10 Marks)
i. Greenhouse effect
ii. Water pollution
SUBJECT: Chemistry (Paper-II)
Time Allowed: 3 Hours
Maximum Marks: 100
Note: Attempt any five questions in all. Attempt in Urdu or English.
Q. No. 1
A) What are the necessary conditions for the absorption of IR radiation by compounds? Which of the following molecules do not absorb in the IR region and why? (15 Marks)
i. H₂
ii. HCl
iii. ICl
iv. N₂
v. H₂O
B) Discuss the applications of ultraviolet/visible spectroscopy. (5 Marks)
Q. No. 2
A) Discuss the effect of hydrogen bonding on boiling points and water solubility of organic compounds. (8 Marks)
B) What is the essential difference between: (12 Marks)
i. Inductive effect and Mesomeric effect
ii. Resonance and Tautomerism
iii. Conjugation and Hyperconjugation
Q. No. 3
A) Describe the general mechanism by which benzene undergoes substitution reactions. (5 Marks)
B) Show the products formed (if any) by the action of the following reagents on benzene: (15 Marks)
i. Concentrated HCl
ii. Bromine water
iii. Concentrated NaOH
iv. Bromine water (duplicate removed logically but kept as intent)
v. Fuming H₂SO₄
Q. No. 4
A) Write the structures of the following compounds: (10 Marks)
i. 2-methylcyclobutanol
ii. tert-amyl alcohol
iii. o-nitrophenol
iv. 2-isopropyl-6-methylphenol
v. neopentyl alcohol
B) Define and explain the following reactions: (10 Marks)
i. Haloform reaction
ii. Cannizzaro reaction
Q. No. 5
A) What is optical isomerism? Discuss necessary conditions for it. How can it be determined? (10 Marks)
B) Write the resonance structures of: (10 Marks)
i. Benzene
ii. Anthracene
iii. Naphthalene
iv. Phenanthrene
Q. No. 6
A) Discuss the digestion, absorption, and transport of proteins. (12 Marks)
B) Discuss the structure and biological significance of nucleic acids. (8 Marks)
Q. No. 7
A) What is chromatography? How is column chromatography used as an analytical technique? (10 Marks)
B) What is polymerization? Compare condensation polymerization with addition polymerization. (10 Marks)
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