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Old Friday, May 29, 2015
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Default Chemistry Papers 2015

FEDERAL PUBLIC SERVICE COMMISSION
COMPETITIVE EXAMINATION FOR
RECRUITMENT TO POSTS IN BS-17
UNDER THE FEDERAL GOVERNMENT, 2015

CHEMISTRY - PAPER I

TIME ALLOWED: THREE HOURS
PART - I (MCQS): MAXIMUM 30 MINUTES

PART - I (MCQS): MAXIMUM MARKS = 20
PART - II: MAXIMUM MARKS = 80

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) All the parts (if any) of each Question must be attempted at one place instead of at different places.
(iv) Candidate must write Q. No. in the Answer Book in accordance with Q. No. in the Q.Paper.
(v) No Page/Space be left blank between the answers. All the blank pages of Answer Book must be crossed.
(vi) Extra attempt of any question or any part of the attempted question will not be considered.
(vii) Use of Calculator is allowed.

PART - II

Q. No. 2. (a) What is Pauli’s Exclusion Principle? (5)
(b) Give the electronic configuration of Sodium. (5)
(c) What are Bohr’s postulates and how do they explain the hydrogen atom
spectrum? (10) (20)

Q. No. 3. (a) Define Heat of combustion. How is it experimentally determined? (10)
(b) For the combustion of 1 mole of benzene at 25°C, the heat of reaction at constant pressure is given by (10) (20)




Q. No. 4. (a) Describe the manufacture of Phosphorus on a large scale. (5)
(b) Draw the figure of Nitrogen cycle in nature. (5)
(c) Compare the physical properties of three allotropic forms of Carbon. (10) (20)

Q. No. 5. (a) How is steel manufactured? Describe various chemical reactions taking place in the blast furnace. (10)
(b) Describe the electrolytic refining of Copper. (10) (20)

Q. No. 6. (a) What are fertilizers? Why are they needed? Describe various types of fertilizers and their uses. (10)
(b) Describe the processes of Urea manufacturing in Pakistan. (10) (20)

Q. No. 7.(a) What are transition metals? Discuss their characteristic features. (5)
(b) Draw molecular orbital diagrams of (10)
(c) What was Rutherford’s atomic model? (5) (20)

Q. No. 8. (a) What is Greenhouse Effect? How does it cause global warming
of Earth? (10)
(b) What is meant by water pollution? Discuss various sources of water
pollution. (10) (20)

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  #2  
Old Friday, May 29, 2015
Last Island's Avatar
Royal Queen of Literature
Medal of Appreciation: Awarded to appreciate member's contribution on forum. (Academic and professional achievements do not make you eligible for this medal) - Issue reason: AppreciationBest Moderator Award: Awarded for censoring all swearing and keeping posts in order. - Issue reason: Best ModGold Medal: Awarded to those members with  maximum number of  reputation points. - Issue reason: For the year 2007, 2008, 2009, 2010, 2011Member of the Year: Awarded to those community members who have made invaluable contributions to the Community in the particular year - Issue reason: 2008Diligent Service Medal: Awarded upon completion of 5 years of dedicated services and contribution to the community. - Issue reason: More than 5 years of dedicated servicesModerator: Ribbon awarded to moderators of the forum - Issue reason:
 
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Default

FEDERAL PUBLIC SERVICE COMMISSION
COMPETITIVE EXAMINATION FOR
RECRUITMENT TO POSTS IN BS-17
UNDER THE FEDERAL GOVERNMENT, 2015

CHEMISTRY - PAPER II

TIME ALLOWED: THREE HOURS
PART - I (MCQS): MAXIMUM 30 MINUTES

PART - I (MCQS): MAXIMUM MARKS = 20
PART - II: MAXIMUM MARKS = 80

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) All the parts (if any) of each Question must be attempted at one place instead of at different places.
(iv) Candidate must write Q. No. in the Answer Book in accordance with Q. No. in the Q.Paper.
(v) No Page/Space be left blank between the answers. All the blank pages of Answer Book must be crossed.
(vi) Extra attempt of any question or any part of the attempted question will not be considered.
(vii) Use of Calculator is allowed.


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