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FPSC · CSS 2015

Chemistry

100 marks · 3 hours · 7 questions
This paper Chemistry · all yearsQ. 2 · What is Pauli's Exclusion Principle?Q. 3 · Define Heat of combustion. How…Q. 4 · Describe the manufacture of Phosphorus…Q. 5 · How is steel manufactured? Describe…Q. 6 · What are fertilizers? Why are…Q. 7 · What are transition metals? Discuss…Q. 8 · What is Greenhouse Effect? How…With this paper← 20142016 →
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Not yet checked 1 of 7 questions have not yet been compared with the official paper.

Part II

Q. 2
  1. (a)What is Pauli's Exclusion Principle? [5]
  2. (b)Give the electronic configuration of Sodium. [5]
  3. (c)What are Bohr's postulates and how do they explain the hydrogen atom spectrum? [10]
(20)
Q. 3
  1. (a)Define Heat of combustion. How is it experimentally determined? [10]
  2. (b)For the combustion of 1 mole of benzene at 25 °C, the heat of reaction at constant pressure is given by C 6 H 6 (l) + 15/2 O 2 (g) → 6CO 2 (g) + 3H 2 O (l); ΔH° = -326720.32 J Calculate ΔΕ at 25 °C. [10]
Not yet checked
(20)
Q. 4
  1. (a)Describe the manufacture of Phosphorus on a large scale. [5]
  2. (b)Draw the figure of Nitrogen cycle in nature. [5]
  3. (c)Compare the physical properties of three allotropic forms of Carbon [10]
(20)
Q. 5
  1. (a)How is steel manufactured? Describe various chemical reactions taking place in the blast furnace. [10]
  2. (b)Describe the electrolytic refining of Copper. [10]
(20)
Q. 6
  1. (a)What are fertilizers? Why are they needed? Describe various types of fertilizers and their uses. [10]
  2. (b)Describe the processes of Urea manufacturing in Pakistan. [10]
(20)
Q. 7
  1. (a)What are transition metals? Discuss their characteristic features [5]
  2. (b)Draw molecular orbital diagrams of [Co(NH 3 ) 6 ] 3+ and [CoF 6 ] 3- [10]
  3. (c)What was Rutherford's atomic model? [5]
(20)
Q. 8
  1. (a)What is Greenhouse Effect? How does it cause global warming of Earth? [10]
  2. (b)What is meant by water pollution? Discuss various sources of water pollution. [10]
(20)

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About this paper

The 2015 CSS Chemistry paper set by the FPSC. Question wording only; questions marked “Not yet checked” have not been compared with the official paper yet.

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