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PPSC · PMS Punjab 2020

Chemistry, Paper I

100 marks · 3 hours · 8 questions
This paper Chemistry · all yearsQ. 1 · Define the Concentration, activity and…Q. 2 · Define the 1st law of…Q. 3 · Define the equalent and molar…Q. 4 · Explain the relationship between free…Q. 5 · What are chelates? Draw structure…Q. 6 · Define hybrid orbital, bond order…Q. 7 · Define eigen function and eigen…Q. 8 · Explain briefly the advantages and…With this paper← 20192020 →
3 hours · questions hide until you reveal them
Q. 1
  1. (a)Define the Concentration, activity and activity coefficient [3]
  2. (b)Discuss the importance of Gibbs free energy in chemistry [7]
  3. (c)What is radioactivity and how it is measured? [10]
(20)
Q. 2
  1. (a)Define the 1st law of thermodynamics and derive its mathematical expression [10]
  2. (b)What is a nuclear reaction? Differentiate between fission and fusion reaction [10]
(20)
Q. 3
  1. (a)Define the equalent and molar conductance. How they are measured? [10]
  2. (b)Differentiate between: i. Potential and potential difference ii. Normal hydrogen and glass electrode [4]
  3. (c)What is pH and how it is measured? [6]
(20)
Q. 4
  1. (a)Explain the relationship between free energy and equilibrium constant [5]
  2. (b)How diammonium phosphate fertilizer is prepared? [5]
  3. (c)How caustic soda is prepared and obtained in solid form? [10]
(20)
Q. 5
  1. (a)What are chelates? Draw structure of three chelate [5]
  2. (b)What is the difference between VBT and CFT? [5]
  3. (c)Define the transition elements, where they are found the periodic table and discuss their ionic configuration. [10]
(20)
Q. 6
  1. (a)Define hybrid orbital, bond order and metallic bond [3]
  2. (b)What is molecular orbital theory? [3]
  3. (c)Differentiate between ionic and covalent bonds [4]
  4. (d)Draw the molecular orbital diagram of O2 molecule and discuss its paramagnetic nature. Also discuss the non-existence of helium molecule on the basis of Molecular Orbital Theory. [10]
(20)
Q. 7
  1. (a)Define eigen function and eigen value [2]
  2. (b)Derive schrodinger wave function and discuss its physical significance. [10]
  3. (c)Explain the Tunnel Effect [8]
(20)
Q. 8
  1. (a)Explain briefly the advantages and disadvantages of supplying sewerage and sludge to the agriculture soil [10]
  2. (b)State and explain the Deby-Huckel theory. How it can be applied to the strong electrolyte [10]
(20)

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About this paper

The 2020 PMS Punjab Chemistry paper set by the PPSC. Question wording only; questions marked “Not yet checked” have not been compared with the official paper yet.

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