Chemistry Subjective Group 1 Inter Part 1 Past Paper 2014 Lahore Board

Chemistry Subjective Group 1 Inter Part 1 Past Paper 2014 Lahore Board

Inter Part 1 Lahore Board 2014

Chemistry           Paper I Essay Type

Time: 3.10 Hours        Marks: 83

Group I


Write short answers to any EIGHT (8) questions

  • No individual neon atom in the sample of the element has a mass of 20.18 ants.
  • Give assumption of Stoichiometry.
  • Calculate mass in kg of 2.6 x 1020 molecules of SO2.
  • Why is there a need to crystallize the crude product?
  • What is sublimation? Give one example of sublime solid.
  • Explain t3oyl’s law according to kinetic molecular theory of gases.
  • What are isotherms?
  • Define Avogadro’s law.
  • Explain why evaporation takes place at all temperatures
  • Why heat of sublimation of iodine is very high?
  • Why ionic crystals do not conduct electricity in the solid state?
  • Define transition temperature with an example.


Write short answers to any EIGHT (8) questions

  • Write down the electronic configuration of Fe (26) and Br (35).
  • What is the difference between continuous spectrum and line spectrum?
  • Give any two properties of neutrons.
  • What is Hand’s rule?
  • How does ionization energy vary in periodic table?
  • Why is the radius of a cation smaller than its parent atom?
  • Define bond order. Calculate bond order of hydrogen molecule.
  • Define co-ordinate covalent bond and give an example.
  • What is state function? Give two examples.
  • What do you know about internal energy of a system?
  • Explain why ionic solids are brittle.
  • Iodine dissolves readily in carbon tetrachloride. Why?


Write short answers to any SIX (6) questions

  • Define PH of a solution. Give its mathematical equation.
  • Why is the vapour pressure of a solution less than pure solvent?
  • Calculate the percentage by weight of NaCt if 2g of it is dissolved in 20g of 1120.
  • What is meant by water of crystallization? Give an example.
  • What is the difference between metallic conduction and electrolytic conduction?
  • Define standard electrode potential.
  • Give chemical reactions taking place at anode and cathode in a fuel cell.
  • Write down any two characteristics of enzyme catalysis.
  • Define order of reaction. Give one example.




Note Attempt any THREE questions.


(a) What are liquid crystals? Give their uses in daily life.

(b) Write down the steps to calculate empirical formula.


(a) Describe the bonding in 0, according to molecular orbital theory and explain its paramagnetic property.

(b) Define and explain Hess’s law and give its applications.


(a) Write down Milikan’s oil drop method for the measurement of charge of an electron.

(b) One mole of methane gas is maintained at 3(10 K, its volume is 250 cm3; calculate the pressure exerted by the gas when it is non-ideal.


(a) Describe Nickel Cadmium Cell (rechargeable).

(b) Ca(OH)2 is a sparingly soluble compound. Its solubility product is 6.5, 10-6. Calculate the solubility of Ca(OH)2.


(a) Define the following terms

(i) Molarity. (ii) Molality. (iii) Mole fraction. (iv) Parts per million.

(b) Write a brief note on the following

(i) Homogeneous catalysis. (ii) Heterogeneous catalysis.

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