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1 9 th LAHORE BOARD 2014 Group I 1) Explain double covalent bond with the help of an example. 2) How do atoms follow octet rule? 3) Explain polar covalent bond with an example. 4) Define pressure. Write down its unit. 5) Why is vapor pressure higher at high temperature? 6) Differentiate between amorphous solids and crystalline solids. 7) What is electro positivity? Explain with an example. 8) Write down any two uses of magnesium.. 1) Define in-organic chemistry. 2) For an element Z = 92. A=238. Calculate the number of electron and proton in it. 3) Define the term anion. Give one example. 4) Write down two properties of cathode rays. 5) Write down the electronic configuration of Be and Ne. 6) Define the term carbon dating. 7) Define Mendeleev s Periodic Law. 8) Why size of atom increases from top to bottom in periodic table? 9) Why noble gases are not reactive? 1) What is difference between dilute solution and concentrated solution? 2) Define solvent and solute.. 3) What does mean by unsaturated solution? 4) What is % vim? 5) Differentiate between oxidizing and reducing agents. 6) In electroplating of chromium, which salt is used as electrolyte? 7) Why O 2 is necessary for rusting? 8) Define molarity. Q. No V; a) Write down any three differences between molecule and molecular ion. b) Describe the significance of chemical formula. Q. No VI; a) Describe the three properties of neutron particle b) Write down four properties of long form of periodic table. Q. No VII; a) Define Boyle's law and derive its equation. b) Write four properties of covalent compounds. Q. No VIII; a) What is the effect of temperature on solubility? b) Give the reaction of sodium with following: (i) H 2 (ii) O 2 (iii) Cl 2 (iv) H 2 O Q. No IX; a) Write a note on the construction of a Daniel Cell. b) What is electroplating? How electroplating of sliver is done?

2 9 th LAHORE BOARD 2014 Group II 1) Why does sodium make ionic bond with chlorine? 2) Define polar covalent bond and give an example. 3) Which type of covalent bond is formed in N2 gas? 4) Define Charles' law. 5) Define diffusion. 6) What is meant by evaporation? 7) Write down two physical properties of metals. 8) Write down two uses of calcium. 1) Differentiate between organic and in-organic chemistry. 2) Define relative atomic mass based on C-12. 3) What is the difference between ions and free radicals? 4) Write down the electronic configuration of 'Na'. 5) State any two uses of isotope. 6) For What purpose u-235 is used? 7) Define periods and groups in the periodic table. 8) State about the trend of ionization energy in a period. 9) Define atomic radius. 1) Define aqueous solutions. 2) What is difference between true solution and colloidal solution? 3) Define molarity. 4) Define unsaturated solution. 5) Calculate oxidation number of nitrogen is HNO 3 6) Define oxidation in terms of electron and give an example. 7) Which salt is used as electrolyte in chromium electroplating? 8) Define electrolytic cell. Q. No V; a) What are difference between atoms and ions? b) Differentiate between the following with example: (i) Molecular mass and molar mass. (ii) Chemical formula and gram formula. Q. No VI; a) Write down any three properties of canal rays. b) Discuss the important features of modern periodic table. Q. No VII; a) Differentiate between crystalline and amorphous solids. b) Define covalent bond. Explain the types of covalent bond with at least one example of each type. Q. No VIII; a) Explain the concentration units: i) % mass / mass ii) % mass / volume b)write down the chemical reactions of Na and Mg with. (i) H 2 O (ii) N Q. No IX; a) Find out the oxidation numbers of the underlined elements in the following compounds: (i) Na 2 SO 4 (ii) KMnO 4 (iii) AgNO 3 (b)discuss redox reaction taking place in the rusting of Iron in detail.

3 9 th LAHORE BOARD 2015 Group I 1) Differentiate between Homo atomic and Hetero atomic molecules. 2) Write the chemical formulae of Aluminum Sulphate and Calcium Phosphate. 3) Define Avogadro's number. 4) Write down the Electronic Configuration of Chloride ion. 5) What is meant by carbon dating? 6) Write any two properties of canal rays. 7) State Mendeleev's Periodic Law. 8) Why the second ionization energy of an element is higher than first one? 1) Write down general electronic configuration of carbon family. 2) What is meant by Lone Pair and Bond Pair of electron in molecule? 3) Define the term boiling point. 4) Evaporation causes cooling. Explain. 5) Define the term vapor pressure. 6) Define solute and solvent. 7) How can distinguish between solution and pure solvent? 8) Define the term Un-saturated solution and pure solvent? 9) Give two examples of colloids. 1) Define Electroplating. 2) What are non-electrolytes, give example? 3) What are redox reactions? 4) Write the names of Electro chemical cells. 5) What is the difference between Anode and Cathode? 6) Define metal, give two examples. 7) Write any two uses of Silver. 8) Give chemical reaction between methane (CH 4 ) and chlorine (Cl) in the presence of diffused light. Q. No V; a) State any three difference between compound and mixture. b) State any four properties of Cathode rays. Q. No VI; a) Discuss any three important features of modern periodic table. b) Describe the properties of ionic compounds Q. No VII; a) A gas at pressure 912 mm of Hg has volume 450cm 3. What will be its volume at 0.4atm? b) What are the effects of temperature on solubility? Explain. Q. No VIII; a) How electroplating of chromium is carried out? b) Write down four' uses of silver in daily life. Q. No IX; a) Give comparison of Electrolytic and Galvanic Cell. (b) Differentiate between electrolytes and non-electrolytes with examples.

4 9 th LAHORE BOARD 2015 Group II 1) Define Organic and In-Organic. 2) Define Tri-atomic and Hetero-atomic Molecule and give one example to each. 3) Find out the molecules in 9 gram of water, 4) Write the electronic configuration of Phosphorus ion and how many neutrons are in it. 5) For what purpose U-235 is used? 6) What are the defects of Rutherford's atomic me del? 7) Describe the classification of Dobereiner's triads and give one example. 8) Define Shielding Effect. Describe its trend along the period. 1) What are the elements arranged in group 3 to 12 are called? 2) Why a Covalent bond becomes polar? 3) Define Diffusion. 4) What is absolute zero temperature? 5) What is Allotropy? 6) Write down example of a solution in which solute is liquid and solvent is gas. 7) How one molar solution is prepared? 8) Define the term vapor pressure. 9) Define Colloid. 1) Define oxidation, state with example. 2) Define redox reactions. 3) Find out oxidation number of nitrogen in HNO1 when: H=+1, 0=-2 4) Define weak electrolytes and give an example. 5) How the half cells of galvanic cell are connected? What is the function of salt bridge? 6) Define metallic character and give an example. 7) Write down two uses of gold. 8) Why Platinum is used for making jewelry? Q. No V; a) Write down any three differences between Atomic Number and Mass Number. b) Describe the Rutherford's Atomic Model Q. No VI; a) Define Group and explain them in periodic table. b) Define Covalent bond and write its types with one example of each. Q. No VII; a) Differentiate between Amorphous solid and Crystalline solid. b) Discuss the effect of temperature on solubility. Q. No VIII; a) Differentiate between Oxidizing agents and Reducing agents with the help of an example. b) Write down four chemical properties of metals. Q. No VII; a) Define saturated solution, how it is prepared. b) Give comparison of Electrolytic and Galvanic cell.

5 9 th LAHORE BOARD 2016 Group I 1) Define Organic. 2) What is mole? 3) What do you mean by carbon dating? 4) Write isotopes of chlorine. 5) Define Avogadro s number. 6) What is difference between Mendeleev's Periodic Law and Modern Periodic Law? 7) Define electron affinity. 8) What is trend of atomic radius in period and group? Q. No III: Write short answers to any Five (5) questions. 1) Write two properties of covalent compounds. 2) Ionic compounds are solid. Explain. 3) Define non-polar covalent bond and give one example. 4) Define hydrogen bonding and give one example. 5) Whether the density of gases increases on cooling? Explain. 6) Define standard atmospheric pressure. 7) Define diffusion and give one example. 8) What is meant by freezing point? 1) Write two differences between collide and suspension. 2) What do you mean by % -mass / mass? 3) Identify a strong and weak electrolyte among the following compounds: CuSO 4, Ca(OH) 2, HCl, HNO 3 4) Write two differences between electronic and galvanic cell. 5) Define corrosion. 6) Write at least two physical properties of magnesium. 7) Complete and balance the given chemical equation: Na + H2 8) Write down the name of four least reactive metals. Note: Attempt any TWO questions. Q. No V; a) Define the following: (i) Physical chemistry (ii) Biochemistry (iii) Element (iv) Radical (v) Atomic number b) Write the four properties of Cathode Rays. Q. No VI; a) How a coordinate covalent bond is formed? Explain with examples. (b) Define evaporation. How it is affected by different factors? Q. No V; a) Define dilute solution and concentrated solution, How a dilute solution is prepared from a concentrated solution? b) Discuss the electrolysis of water and write down the chemical reactions.

6 9 th LAHORE BOARD 2016 Group II 1) Define biochemistry. 2) Define valency with an example. 3) Write down two properties of positive rays. 4) Differentiate between shells and sub-shells. 5) Define isotopes with an example. 6) Define Mendeleev s periodic law. 7) Differentiate between periods and groups. 8) Define shielding effect. Q. No III: Write short answers to any Five (5) questions. 1) Briefly describes the ionic bond. 2) Differentiate between polar and non-polar covalent bond. 3) Why does ice float on water? 4) Write two properties of covalent compounds. 5) What do you mean by standard atmospheric pressure? 6) Define vapour pressure. 7) Distinguish between amorphous solid and crystalline solid. 8) What is meant by transition temperature? 1) What is the difference between solute and solvent? 2) How one molar solution is prepared? 3) What is the difference between anode and cathode? 4) What are non-electrolytes? Give an example. 5) What is redox reduction? 6) Write any two chemical properties of halogens. 7) Write the names or symbols of any two elements of Nobel Gases. 8) Write any two uses of sodium. Note: Attempt any TWO questions. Q. No V; a) Write any five characteristics of mixture. b) What is the difference between Rutherford s and Bohr's atomic Theory? Q. No VI; a) Define ionic bond. Explain different steps in formation of NaCl. b) Define Boyle s law and write its experimental verification. Q. No V; a) Define solubility and describe the effects of temperature on solubility. b) Describe oxidation and reduction in terms of loss or gain of electron.