CHEMISTRY, PAPER-II
FEDERAL PUBLIC SERVICE COMMISSION
COMPETITIVE EXAMINATION FOR
RECRUITMENT TO POSTS IN BPS-17 UNDER
THE FEDERAL GOVERNMENT, 2009
CHEMISTRY, PAPER-II
TIME ALLOWED: (PART-I) 30 MINUTES MAXIMUM MARKS:20 (PART-II) 2 HOURS & 30 MINUTES MAXIMUM MARKS:80
PART – I (MCQ)
(COMPULSORY)
Q.1. Select the best option/answer and fill in the appropriate box on the Answer Sheet. (20)
(i) The orbitals providing the most efficient overlap are:
(a) s–s (b) p–p (c) sp–sp (d) sp2–sp2
(ii) Nylon is a copolymer of:
(a) Urea and Formaldehyde (b) Phenol and Formaldehyde
(c) Hexamethylenediamine and adipic acid (d) Vinyl Chloride and Vinylalcohol
(iii) Which of the following would react with one mole of Grignard’s reagent to yield a ketone?
(a) RCONR′ R′′ (b) RCONHR′ (c) RCONH2 (d) RCOOH
(iv) Glyceraldehyde has one of the following properties:
(a) One asymmetric carbon atom (b) Two asymmetric carbon atoms
(c) A meso compound (d) Four asymmetric carbon atoms
(v) The antifreeze compound ethylene glycol has the formula:
(a) C2H5OH (b) CH3OH (c) C2H4(OH)2 (d) C3H5(OH)3
(vi) Distillation is the best method for separating the two substances in which of the following:
(a) Water and salt dissolved
(b) water and a substance which does not dissolve in it
(c) Two liquids that have different boiling points
(d) Two solids that have different melting points.
(vii) Which of the following describes “Amino” group as a substituent in electrophilic aromatic
substitution.
(a) Weakly activating and O/P – directing (b) Strongly activating and O/P – directing
(c) Weakly deactivating, meta-directing (d) Strongly activating, meta-directing
(viii) Which would be the best solvent to conduct this reaction.
CH3CH2Br + Mg BrMgCH2CH3
(a) Acetone (b) Acetonitrile (c) Diethylether (d) Ethylacetate
(ix) If K1<K2 which of the following rate laws is consistent with the mechanism proposed for the
conversion of NO3+NO → 2NO2?
Proposed mechanism
3
2 5
2 5
K1
2 3
NO N O 3NO
NO NO N O
+ ⎯⎯→
+ ⎯⎯→
(a)
[ ] [ ][ ] 1 2 2 3
3 K K NO NO
dt
d NO = (b)
[ ] [ ][ ] 1 2 2 3
3 K K NO NO
dt
d NO = −
(c)
[ ] [ ][ ] K K NO NO
dt
d NO
1 2 3
3 = − (d)
[ ] [ ][ ] 1 2 3
3 K NO NO
dt
d NO = −
(x) Which of the following is the best description of the geometry of PCl5?
(a) Tetrahedral (b) Trigonal Pyramid (c) Trigonal bipyramid (d) Square pyramid.
?
(xi) CH2
This reaction could successfully be performed using which one of the following reagents.
(a) Ph3PCH2 (b) CH3OCOCH2COOCH3 (c) CH2Br2 (d) PCC
NOTE: (i) First attempt PART-I (MCQ) on separate Answer Sheet which shall be taken back
after 30 minutes.
(ii) Overwriting/cutting of the options/answers will not be given credit.
(iii) Scientific Calculator is allowed.
S.No.
R.No.
CHEMISTRY, PAPER-II
(xii) Which one of the following is not a petrochemical.
(a) Cumene (b) Paraffin (c) Aluminum Chloride (d) Epoxy resin
(xiii) The term syndiotactic is related to which one of the following?
(a) Synthetic detergents (b) Table Salt (c) Paraffin (d) Polyprophylene
(xiv) Which one of the following is used as an Antibiotic?
(a) Patulin (b) Insulin (c) Soserine (d) Trypsin
(xv) Heroin is diacetate of:
(a) Papaverine (b) Morphine (c) Codeine (d) Thebaine
(xvi) A reaction that practically is given by all organic compounds.
(a) Elimination (b) Friedel-Craft ecylation (c) Combustion (d) Rearrangement
(xvii) Which functional group is present in polyester shirt?
(a) Lactam (b) Acid Chloride (c) Ether (d) Ester
(xviii) Which statement is true for Halogen (Halo-group)?
(a) Activating and O, p–directing (b) Activating and m–directing
(c) Deactivating and O, p–directing (d) None of these.
(xix) Which one of the following can be synthesized from Aryl Diazonium Salt?
(a) Furfural (b) Carbylamine (c) Biphenyl (d) THF
(xx) The Methyl group in Methyl Magnesium Iodide can act as:
(a) CH3 Radical (b) CH3 Carbonium ion (c) CH3 Carbanion (d) Can react with a base
PART – II
NOTE:
(i) PART-II is to be attempted on the separate Answer Book.
(ii) Attempt ONLY FOUR questions from PART-II. All questions carry EQUAL marks.
(iii) Extra attempt of any question or any part of the attempted question will not be
considered.
Q.2. (a) Explain the structure of Grignard’s reagent. (6)
(b) How aldehydes, ketones, carboxylic acids, Hydrocarbons and alcohols can be synthesized from
Grignard’s reagent. (10)
(c) Complete the following reaction. (4)
Br Mg/Ether ? Chlorianil ?
o
Q.3. (a) How you will synthesize the following starting from benzene. (2+5+3)
(i) Acetophenone (ii) 1,3,5-tribromobenzene (iii) n–propyl benzene
(b) In electrophilic aromatic substitution “Halogens” are deactivating but O, p–directing. Explain. (5)
(c) Sulphonation is reversible reaction at high temperature. Discuss its merits.. (5)
Q.4. (a) Describe various methods to determine the order of reaction. (9)
(b) What is the third order reaction. Give examples. (4)
(c) Derive the Kinetic equation for 3rd order reaction. (7)
Q.5. (a) Can we prepare the Aliphatic diazonium salt. If yes, give examples. (3)
(b) How can the following prepared from benzene diazonium salt. (3+5+4)
(i) Benzene (ii) m-nitrophenol (iii) Biphenyl
(c) Write a note on Sandmeyer reaction. (5)
Q.6. (a) Describe the exact source of raw material used in Petrochemicals. (3)
(b) Give Industrial synthesis of vinylacetate. (10)
(c) Describe the production of Vitamin-C from Glucose. (7)
Q.7. (a) Describe the synthesis of streptomycin. (6)
(b) Discuss the role of Fermentation in Organic Synthesis. (4)
(c) Give synthesis of polypropylene and its uses. (10)
Q.8. (a) What is Margarine? How it is manufactured industrially? (10)
(b) Nicotine on Oxidation with KMnO4 gave. Nicotinic acid. Write structures of nicotine, nicotinic acid
and two other isomer of nicotinic acid. (6)
(c) Write a note on epimerization. (4)
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