PMS Chemistry Paper 2


PUNJAB PUBLIC SERVICE COMMISSION
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.
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)

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