PUNJAB PUBLIC SERVICE COMMISSION
COMBINED COMPETITIVE EXAMINATION
FOR RECRUITMENT TO THE POSTS OF
PROVINCIAL MANAGEMENT SERVICE, ETC.
COMBINED COMPETITIVE EXAMINATION
FOR RECRUITMENT TO THE POSTS OF
PROVINCIAL MANAGEMENT SERVICE, ETC.
CHEMISTRY (OPTIONAL) PAPER-II
TIME ALLOWED: 3 HOURS MAXIMUM MARKS: 100
Note: Attempt any FIVE questions only. Write answers in English.
Note: Attempt any FIVE questions only. Write answers in English.
Q.1: Explain the difference between (20)
(i) Inductive Effect and Resonance Effect ( i) Localized Bond and Delocalized Bond
(iii) Conjugation and Hyperconjugation
(iv) Steric Effect and Tautomerism
Q.2: (a) Write a comprehensive note on any of the following: (10)
(i) Column Chromatography
(ii) Paper Chromatography
(b) Explain Ultraviolet (UV) spectroscopy. (10)
Q.3: (a) Write the products formed by the following reactions: (15)
(i) Addition of HCN to acetone
(ii) Addition of Grignard Reagent to Butanone
(iii) Reaction of Formaldehyde with Ammonia
(iv) Reaction of Butanone with HAIR:.
(v) Reaction of Aldehyde with Tollen's Reagent
(b) Sodium Sulphite is used for purification of aldehydes and Ketones. Explain. (5)
Q.4: (a) Describe mechanism of Firdel Craft alkylation of benzene. (8)
(b) Write a note on condensed ring aromatic compounds. Discuss preparation of Naphthalene. (12)
Q.5: (a) What are Dyes? Describes Acidic and Basic Dyes. Explain the role of perfumes and deodorants. (10)
(b) Define the term detergent. What are the types of detergents? How does a detergent differ from Soap? Discuss cleansing action of detergent. (10)
Q.6: (a) Explain the difference between Chain Growth and Step Growth Polymerization. (10)
(b) How do thermoplastic differs from thermosetting polymers? (10)
Q.7: (a) What are vitamins? How are they classified? Describe the role of various vitamins in the body. (10)
(b) Discuss various factors affecting enzymic activity? (10)
