PUNJAB PUBLIC SERVICE COMMISSION
Combined Competitive Examination (CCE) 2023
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
Write brief notes on the following: (6 + 7 + 7 = 20 Marks)
a) Photoelectric effect
b) Compton effect
c) de Broglie wavelength
Q. No. 2
a) Explain entropy change in reversible and irreversible processes. (12 Marks)
b) Describe the applications of Gibbs free energy as useful work. (8 Marks)
Q. No. 3
a) Briefly describe the Debye–Hückel theory and its application to strong electrolytes. (10 Marks)
b) Justify how a galvanic cell (Daniell cell) is reversible. (10 Marks)
Q. No. 4
a) Describe the non-integrating type ionization chamber for measuring radioactivity. (12 Marks)
b) Explain nuclear fusion reactions with examples. (8 Marks)
Q. No. 5
a) Elaborate the rules/principles for filling electrons in orbitals with suitable examples. (8 Marks)
b) Compare Valence Bond Theory (VBT) with Molecular Orbital Theory (MOT). (8 Marks)
c) Write down the postulates of VSEPR theory. (4 Marks)
Q. No. 6
a) Describe the similarities and differences between Valence Bond Theory and Molecular Orbital Theory. (10 Marks)
b) What are the applications of chelate compounds? (10 Marks)
Q. No. 7
a) Discuss the process of manufacture of urea with reaction. (10 Marks)
b) Compare wet and dry processes in the cement industry. Discuss their advantages and disadvantages. (10 Marks)
Q. No. 8
a) Explain how acid rain and smog pollute the environment. (12 Marks)
b) What is the role of ozone in the environment? (8 Marks)
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) Differentiate between the following: (10 Marks)
i. Conjugation and Hyperconjugation
ii. Covalent bond and Hydrogen bond
iii. Localized and Delocalized bond
iv. Resonance effect and Inductive effect
v. Intermolecular and Intramolecular hydrogen bonding
b) Compare the basicity of: (10 Marks)
i. Aniline and amine
ii. Primary, secondary, and tertiary alcohols
Compare the acidity of:
i. Phenol and alcohol
ii. Fluoro-, chloro-, and bromoacetic acid
iii. 1-chloro, 2-chloro, and 3-chlorobutanoic acid
Q. No. 2
a) Write short notes on: (8 Marks)
i. Fingerprint region
ii. Chromophores
b) Discuss the principle of IR spectroscopy. How will you distinguish between the following pairs using IR spectroscopy? (12 Marks)
i. Ethyl alcohol and diethyl ether
ii. Acetic acid and ethyl acetate
Q. No. 3
a) How will you prepare the following compounds starting from alcohol? (12 Marks)
i. Pentanal
ii. 2-butanone
iii. 3-pentanone
iv. Cyclohexanone
v. Benzyl isopropyl ketone
vi. 2,2-dimethyl-2-pentanone
b) Write the expected products of aldol condensation between: (8 Marks)
i. Acetaldehyde and formaldehyde
ii. Acetaldehyde and acetone
Q. No. 4
a) How are aromatic compounds prepared by the following methods? (10 Marks)
i. Wurtz–Fittig method
ii. Friedel–Crafts reactions
b) Discuss the following electrophilic reactions of benzene: (10 Marks)
i. Halogenation
ii. Nitration
iii. Sulphonation
Q. No. 5
a) What are lipids? Classify them and discuss their importance. (10 Marks)
b) What are proteins? Discuss their structure and general properties. (10 Marks)
Q. No. 6
a) Explain the differences between: (16 Marks)
i. Stationary phase and Mobile phase
ii. Retention time and Retention volume
iii. Adsorption and Partition chromatography
iv. Liquid–liquid chromatography and Liquid–solid chromatography
b) How is thin layer chromatography (TLC) performed? (4 Marks)
Q. No. 7
a) What are semiconductors? How are they classified? (10 Marks)
b) What is PET? Discuss its manufacture and applications. (10 Marks)
Q. No. 8
a) Discuss inorganic pigments in detail. (8 Marks)
b) Define detergents and discuss their classification. (12 Marks)
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