Past Paper Chemistry 1st Year BISE Lahore 2014 Group 1

7/24/2019 Past Paper Chemistry 1st Year BISE Lahore 2014 Group 1

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Inter (Part-I) Lahore Board 2014

CHEMISTRY Time : 20 Minutes

PARER-I (Objective Type) Marks : 17

GROUP-I

Note: Four possible answers A, B, C and D to each question are given. The choicewhich you think

is correct, fill that circle in front of that question with Marker or Pen ink. Cutting or filling two or

more circles will result in zero mark in that question.

Q1.

1. Dry Ice (Solid CO2) is an example of solid :

(A) Covalent(B) Molecular

(C) Ionic

(D) Metallic

2. Specific rate constant is equal to rate of reaction, when concentration of reactants are :

(A) Zero

(B) Four

(C) Three

(D) Unity

3. Number of bonds in N2 molecule :

(A) 1 + 1

(B) 2 + 1

(C) 1 + 2

(D) 1 + 3

4. Largest number of molecules are in :

(A) 3.6 gmH20

(B) 4.8 gm C2H5OH

(C) 2.8 gm CO

(D) 5.8 gm N205

5. Glycerine decomposes at its :(A) Melting point

(B) Boiling point

(C) Freezing point

(D) Critical point

6. Maximum no. of electrons in an orbital is :

(A) 6 (B) 10 (C) 14 (D) 2

7. Solvent extraction is a process :


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(A) Exothermic

(B) Endothermic

(C) Equilibrium

(D) Non-equilibrium

8. Gooch crucible is made of:

(A) Clay (B) Asbestos (C) Procelain (D) Iron9. Oxidation No. of oxygen in OP2 is :

(A) 0 (B) -1/2 (C) +2 (D) -1

10. Molarity of pure water is :

(A) 1 (B) 18 (C) 55.5 (D) 6

11. pH of 10-3

mole dm-3

of an aqueous solution of H2SO4 is :

(A) 3 (B) 2.7 (C) 2 (D) 1.5

12. If a and b are zero for certain gas then gas is :

(A) Ideal

(B) Real

(C) Non - ideal(D) May be any diatomic gas

13. CsF has ionic character:

(A) 60% (B) 80% (C) 92% (D) 100%

14. Mass of one mole of electron is :

(A) 1.008 mg

(B) 0.55 mg

(C) 1.84 mg

(D) 1.673mg

15. + where X is :

(A) Proton

(B) Positron

(C) Electron

(D) Neutron

16. In endothermic reaction H is taken as :

(A) Positive

(B) Negative

(C) Zero

(D) May be any value

17. Escape out of gas molecules one by one through tiny hole is:(A) Diffusion

(B)Effusion

(C) Osmosis

(D) All of these


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Inter (Part-I) Lahore Board 2014

CHEMISTRY Time Allowed: 3.10 Hours

PARER-I (Essay Type) Maximum Marks: 83

GROUP-I

(SECTION-I)

2. Write short answers to any EIGHT (8) questions: 16

a) No individual neon atom in the sample of the element has a mass of 20.18 amu.

b) Give assumption of stoichiometry.

c) Calculate mass in kg of 2.6 x 1020

molecules of SO2.d) Why is there a need to crystallize the crude product?

e) What is sublimation? Give one example of sublime solid.

f) Explain Boyls law according to kinetic molecular theory of gases.

g) What are isotherms?

h) Define Avogadro's law.

i) Explain why evaporation takes place at all temperatures:

j) Why heat of sublimation of iodine is very high?

k) Why ionic crystals do not conduct electricity in the solid state?

l) Define transition temperature with an example.

3. Write short answers to any EIGHT (8) questions: 16

a) Write down the electronic configuration of Fe (26) and Br (35).

b) What is the difference between continuous spectrum and line spectrum?

c) Give any two properties of neutrons.

d) What is Hunds rule?

e) How does ionization energy vary' in periodic table?

f) Why is the radius of a cation smaller than its parent atom?

g) Define bond order. Calculate bond order of hydrogen molecule.h) Define co-ordinate covalent bond and give an example.

i) What is state function? Give two examples.

j) What do you know about internal energy of a system?

k) Explain why ionic solids are brittle.

l) Iodine dissolves readily in carbon tetrachloride. Why?


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4. Write short answers to any SIX (6) questions: 12

a) Define PH of a solution. Give its mathematical equation.

b) Why is the vapour pressure of a solution less than pure solvent?

c) Calculate the percentage by weight of NaCl if 2g of it is dissolved in 20g of H2O.

d) What is meant by water of crystallization? Give an example.e) What is the difference between metallic conduction and electrolytic conduction?

f) Define standard electrode potential.

g) Give chemical reactions taking place at anode and cathode in a fuel cell.

h) Write down any two characteristics of enzyme catalysis.

i) Define order of reaction. Give one example.

(SECTION-II)

Note: Attempt any THREE questions.

5. (a) What are liquid crystals? Give their uses in daily life. 4

(b) Write down the steps to calculate empirical formula. 4

6. (a) Describe the bonding in 02 according to molecular orbital theory and explain its

paramagnetic property.

4

(b) Define and explain Hess's law and give its applications. 4

7. (a) Write down Milikans oil drop method for the measurement of charge of an electron. 4

(b) One mole of methane gas is maintained at 300 K, its volume is 250 cm3, calculate the

pressure exerted by the gas when it is non-ideal. 4

8. (a) Describe Nickel Cadmium Cell (rechargeable). 4

(b) Ca(OH)2 is a sparingly soluble compound. Its solubility product is 6.5 x 106

Calculate the

solubility of Ca(OH)2. 4

9. (a) Define the following terms : 4

(i) Molarity.

(ii) Molality.

(iii) Mole fraction.

(iv) Parts per million.

(b) Write a brief note on the following: 4

(i) Homogeneous catalysis.

(ii) Heterogeneous catalysis.


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(SECTION-II)

(Practical Part)

Note: Attempt any THREE questions.

a) Write down standard solution, chemical equation with mole ratio, indicator with end point,

procedure and supposed reading with calculation for Part A. B, and C. 1,1,1,1,1,

b) Write down material required, diagram and procedure for Part D and E. 1,1,3

c) 5.6g of MOH are dissolved per dm3

of solution. Find out the atomic mass of M. 5

d) 27.8 g of FeSO4 x H20 are dissolved per dm3

of a solution. Find out the value of x. 5

e) 30 g of a sample of sodium thiosulphate (Na2S203.5H20) has been dissolved per dm3

of a

solution. Find out the % age purity of the sample. 5

(Molecular mass of Na2S203.5H20 = 248 g / mole )

f) Separate Pb+2

and Cd+2

ions by paper chromatography. 5

g) Prepare pure and dry crystals of benzoic acid. 5

Past Paper Chemistry 1st Year BISE Lahore 2014 Group 1

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