Chemistry KP PMS Paper II 2010

KHYBER PAKHTOON KHWA PUBLIC SERVICE COMMISSION PESHAWAR
Subject: Competitive Examination
for the Posts of Provincial Management Service (BPS-17) 2010

CHEMISTRY PAPER II

Time Allowed: 03 hours Max. Marks: 100

Note: Attempt any five questions_All questions carry equal marks.

1 A) Define the terms Sigma and pi bonds. What types of atomic orbitals give Sigma and pi bonds’? Illustrate with the help of diagrams. 12
B) Predict and draw the shapes of NH3 H2O C2H4 and C2H2 using Hybridization. 08

2 A) What is 1st order reaction? Explain with help of equation and describe its characteristics giving one example. 14
B) Explain the terms: i) Order of Reaction., ii) Molecularity of Reaction iii) Rae Law 06

3 A) Describe with example the main types of Catalysis. 12
B) What is hydrogen bond? Discuss its effects on the properties organic compounds. 08

4 A) What it Grignard Reagent? Discuss with examples reactions of this Reagent. 10
B) Name typical reactions of carbonyl compounds. Describe following Nucleophilic addition Reactions: i) Base-catalyzed, ii) Acid-Catalyzed, iii) Ammonia and its derivatives. 10

5 A)Describe the following Electrophilic Substitution Reactions i) Friedel-Crafts Reactions,
ii) Formylation iii) Carboxylation, 12
B) What is Aromaticity? Describe the Criteria and evidences for Aromaticity. 08

6 What is Diazotization? How Diazonium salts are prepared? Describe with examples the Replacement Reactions of Diazonium salts. 20

7 A) What k the role of Vitamins in the body? Write a note on Vit-B. 06
B) Describe with example the classes of Polymers. Write comprehensive notes on Polyesters, Polyamides, and Polyurethane. 14