xii chemistry paper 1-series 1

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TEST PAPER  FOR XII BOARD PREPERATION-2013

CONTAINING—(ISOLATION AND EXTRACTION,,p-BLOCK AND EVERYDAY LIFE )                                                                                                               MM=35
                                                                                                        TIME=45MINUTES 
  
     Question -1-2 carry 1 marks each.Question 3 and 4 of 2 marks each. 
                         -And question 5,6,9 of 2 marks each.
                           Question number  10.,11 of  3 marks each while  8  of 7 mark and 12 of  10 (2 marks each)..




Q1-what is the harmful effect of excess of aspirin?
Q2-what is broad spectrum antibiotics..give example.?
Q3-what is role of iodine in extraction of titanium.?
Q4-why only sulphide ore are extracted by froth flotation process.?
Q5-write notes on---(i) Zone refining   (ii)vapour phase refining
Q6- (i)what are tranquilizers.?
       (ii) what is Side effect of Alitame?
Q7-drow the structure of  H 2SO 4     H 3PO 4   HclO4    .?
Q8-Complete the following reactions---
(i)                  2 H 3PO 3          (HEAT)               ---------------
(ii)                P4   + NaOH+ HO                ---------------
(iii)               Xe F4+H 2O                            -   -----------
(iv)              I 2  + H 2O + Cl 2                            -----------------------
(v)                 NaCl   + Cl 2     (red hot)        -------------------------
(vi)              Hgcl 2  +  PH 3                                 -----------------------
(vii)             I 2  + HNO 3                                     ----------------------
Q9  (i) Ammonia is more basic then phosphine.?
       (ii)  Icl  is more reactive then I 2 .?
Q10. (i) What is role of NaCN  in leaching process?
          (ii) H 2S is more acidic then water?
         (III)  What is food preservatives…give examples?
Q11- (i) How antiseptics are different from disinfectant.?
          (ii)Give only reaction which take place during the extraction of nickel by mond process.?
           (iii)Define the term contact process.give all step.?
Q12-  (i)PCl 5 behave as ionic compound in solid state?
         (ii) Why NO 2 readily form dimers.?
         (ii) Write the main constituent of detol.?
        (IV) What are antihistamine.?
        (v) what  are detergents.how they work and how they are different foam soap.?


                                                       BY DR SUDHIR TOMAR

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