PUNJAB PUBLIC SERVICE COMMISSION
COMBINED COMPETITIVE EXAMINATION
FOR RECRUITMENT TO THE POSTS OF
PROVINCIAL MANAGEMENT SERVICE, ETC -2025
CASE NO. 36C2025
SUBJECT: CHEMISTRY (PAPER-II)
TIME ALLOWED: THREE HOURS MAXIMUM MARKS: 100
NOTE:
i. All the parts (if any) of each Question must be attempted at one place instead of at different places.
ii. Write Q. No. in the Answer Book in accordance with Q. No. in the Q. Paper.
iii. No Page/Space be left blank between the answers. All the blank pages of Answer Book must be crossed.
iv. Extra attempt of any question or any part of the question will not be considered.
NOTE: Attempt any FIVE Questions in all. Attempt in Urdu or English.
Q.No.1 a) Explain hydrogen bonding. Describe its types and applications.
b) Give three examples of keto enol tautomerism of different functional groups.
(14+6=20 Marks)
Q.No.2 a) Discuss the absorption spectra of benzene. What is the effect of:
(1) Chromophores and (2) Auxochromic group attached to benzene.
b) How will you distinguish between the followings by IR spectroscopy?
(1) Accetic acid and ethyle acetate (2) Analine and benzaldehyde
(10+10=20 Marks)
Q.No.3 a) How aldehyde and ketones are prepared by:
(1) Oxidation of 2-alcohol (2) Dehydrogenation of 2- alcohol
(3) Oppenauer oxidation (4) Gatterman-Koch reaction
b) Write notes on:
(1) Wolff kishner reduction (2) Clemmensons reduction (3) Cannizaro reaction
(10+10=20 Marks)
Q.No.4 a) What is Aromaticity? Discuss Huckle’s Rule for Aromaticity. Give examples.
b) How will you prepare following compounds from Toluene?
(1) Benzoic acid (2) Benzyl Bromide (3) m-nitrobenzoic acid
(10+10=20 Marks)
Q.No.5 a) Discuss properties of Enantiomers and Diastereomers. What is optical isomerism? Discuss conditions for optical isomerism. Also discuss optical isomerism of tartaric acid.
b) Write notes on:
(1) Resolution of racemic mixtures (2) Walden inversion
(10+10=20 Marks)
Q.No.6 a) Describe the structure of two monosaccharides, one disaccharide and polysaccharide starch and cellulose.
b) Explain the following terms with suitable examples:
(1) Aldopentose (2) ketohexose (3) Hemiacetal (4) Epimer
(5) Anomer (6) Dextrose (7) Non reducing sugar
(8) Glycoside (9) invert sugar (10) Aldonic acid
(10+10=20 Marks)
Q.No.7 What is column chromatography? Discuss the structure and working of HPLC. Also discuss its applications in industry. (20 Marks)
Q.No.8 a) What are the intrinsic and extrinsic semiconductor? Give at least five applications of semiconductors.
b) Give specific example with equation for the formation of:
(a) Copolymer (b) Condensation polymer
(10+10=20 Marks)
COMBINED COMPETITIVE EXAMINATION
FOR RECRUITMENT TO THE POSTS OF
PROVINCIAL MANAGEMENT SERVICE, ETC -2025
CASE NO. 36C2025
SUBJECT: CHEMISTRY (PAPER-II)
TIME ALLOWED: THREE HOURS MAXIMUM MARKS: 100
NOTE:
i. All the parts (if any) of each Question must be attempted at one place instead of at different places.
ii. Write Q. No. in the Answer Book in accordance with Q. No. in the Q. Paper.
iii. No Page/Space be left blank between the answers. All the blank pages of Answer Book must be crossed.
iv. Extra attempt of any question or any part of the question will not be considered.
NOTE: Attempt any FIVE Questions in all. Attempt in Urdu or English.
Q.No.1 a) Explain hydrogen bonding. Describe its types and applications.
b) Give three examples of keto enol tautomerism of different functional groups.
(14+6=20 Marks)
Q.No.2 a) Discuss the absorption spectra of benzene. What is the effect of:
(1) Chromophores and (2) Auxochromic group attached to benzene.
b) How will you distinguish between the followings by IR spectroscopy?
(1) Accetic acid and ethyle acetate (2) Analine and benzaldehyde
(10+10=20 Marks)
Q.No.3 a) How aldehyde and ketones are prepared by:
(1) Oxidation of 2-alcohol (2) Dehydrogenation of 2- alcohol
(3) Oppenauer oxidation (4) Gatterman-Koch reaction
b) Write notes on:
(1) Wolff kishner reduction (2) Clemmensons reduction (3) Cannizaro reaction
(10+10=20 Marks)
Q.No.4 a) What is Aromaticity? Discuss Huckle’s Rule for Aromaticity. Give examples.
b) How will you prepare following compounds from Toluene?
(1) Benzoic acid (2) Benzyl Bromide (3) m-nitrobenzoic acid
(10+10=20 Marks)
Q.No.5 a) Discuss properties of Enantiomers and Diastereomers. What is optical isomerism? Discuss conditions for optical isomerism. Also discuss optical isomerism of tartaric acid.
b) Write notes on:
(1) Resolution of racemic mixtures (2) Walden inversion
(10+10=20 Marks)
Q.No.6 a) Describe the structure of two monosaccharides, one disaccharide and polysaccharide starch and cellulose.
b) Explain the following terms with suitable examples:
(1) Aldopentose (2) ketohexose (3) Hemiacetal (4) Epimer
(5) Anomer (6) Dextrose (7) Non reducing sugar
(8) Glycoside (9) invert sugar (10) Aldonic acid
(10+10=20 Marks)
Q.No.7 What is column chromatography? Discuss the structure and working of HPLC. Also discuss its applications in industry. (20 Marks)
Q.No.8 a) What are the intrinsic and extrinsic semiconductor? Give at least five applications of semiconductors.
b) Give specific example with equation for the formation of:
(a) Copolymer (b) Condensation polymer
(10+10=20 Marks)
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