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Lahore board


  Ninth Lahore Board 2009   

Paper : chemistry                   (Obj. Type)                      Paper-I  
 Total Marks: 12                     Group-1I       Time Allowed: 15 Min . 
 Note:Use this paper to write the answers to the objective 
questions. No marks will be awarded for cutting, over-writing or using a pencil. This paper must be tagged with the answer-
book. 1. Four possible answers arc given for the following questions. Tick mark (/) the correct answer: (12) 

(i) Who studied the process of electrolysis in detail: 
     (Newton ,Faraday ,Hess . Boyle) 
(ii) Formula Hydrogen sulphate radical is:-
      (HS, HCO3,HSO3, HSO4
(iii) Who discovered neutron
      (Dalton . Goldstein, Bohr, James Chadwick) 
(iv) The number of noble gases is
       (2. 4. 6. 8) 
(v) Whose oxide will be amphoteric
       (P , Na , Si, Al) 
(vi) Iilectroitcgitivii of fluorine is equal to: 
      (5 . 4 ,3 ,2 ) 
 (vii)  Covalent liquids are: 
        Benzene . Ether . Benzene and Ether, None of these)
 (viii) which o'ne is soluble in water: 
      (Kerosene oil . Chloroform . Methanol ,None of these)
 (ix) How many types of electrochemical cells  are:
        (I .2.3.4) 
(x) Urea is one: (Strong electr lyte . Weak electrolyte 
      Non-electrolyte . None of these) 
(xi)  The colour of pH papei is:
      (Blue . Red . Green . Yellow)  
(xii) Which gas is produced when carbon burns in oxygen:   

                             Ninth Lahore Board 2009
Paper: Chemistry           (Group-1I)                      (EssayType) 
Time Allowed: 1.45 Hours                                     Max. Marks: 48 Note:Attempt any FIFTEEN (15) questions front Part-1 and attempt any TWO questions from Part-11:                           
2. Write any FIFTEEN (15) short answers of the following 
    questions:                                                   (30) 
(i) Define inorganic chemistry. 
(ii) According Jo scientific method, What is law? 
(iii) Describe ionization energy with one example. 
Civ) What is mole? How many moles are present in a mole? 
(v) Give two properties of cathode rays. 
(vi) What is meant by natural radioactivity? 
(vii) Define ionization energy, give units.
(viii) Which transition element is present in ginger colour of the 
(ix) What is amphoteric oxide.
(x) What are co-ordinate covalent bonds? (give two examples. 
(xi)  Name the types of bond.. 
(xii) Write a note on dipole-dipole forces. 
(xiii) Define boiling point. 
(xiv) What are hydrated ions?
 (xv) What is the difference between solute and solvent
 (xvi) Define unsaturated solution. 
(xvii) What is difference between electrolytic and voltaic cell? (xviii) Write Faraday's first law of eleeirolysis. 
(xix) What is difference between strong and weak acid? Give one 
         example of each. 
(xx) Write two properties of acids. 
(xxi j Give two uses of sodium carbonate. 
(xxii) What is difference between exothermic and endothermic reactions? 
Q: 3. 
(a) Whal is law of reciprocal proportions? fxplain wilh examples.  (b) Write a note on super saturated solution. 4 
Q: 4.
 (a) Write in detail the basic particles of an atom.               5
 (b) What is electroplating? Describe the objectives of electroplating. I 
Q: 5. 
{a) How a covalent bond is formed? Explain by giving examples. Write down the properties of covalent compounds.          5
(b) Explain acidity of a base.                     4

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