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Tuesday, July 19, 2011

Karnataka Second PUC Chemistry Question Paper of March, 2010

Download Karnataka Second Pre University Board Chemistry Question Paper of March, 2010 in Both English & Kannada Version | Karnataka 2nd PUC Annual Question Papers | Karnataka Second PUC Previous Year or Old Question Papers | Karnataka Second PUC Model Question Papers  | Download Second PUC Question Papers in PDF Format.

Below is The Karnataka Second PUC Chemistry Question Paper of March 2010 & Download This Question Paper of Both English & Kannada Version in PDF Format.

Karnataka Second PUC Chemistry Question Paper of March, 2010

Time : 3 Hours 15 Minutes                                                                          Max. Marks :90
Total No. of Questions : 39                                                                                Sub Code No.  34
                                    English Version 
Instructions: i) The question paper has four Parts.
                    ii) Parts A, B, C and D are common to all the candidates.
                    iii) Part A carries 10 marks.  Each  question  carries  one mark.
                         Part B carries 20 marks. Each question carries  two marks.
                         Part C carries 40 marks. Each question carries  five marks.
                         In  Part  D  —  D 1    carries  10  marks  and  D 2  carries 

                        10 marks. Each question of D 2  carries five marks.                              
                    iv) Write  balanced  chemical  equations  and  draw  diagrams
                          wherever necessary.

Note :
i) Answer all the 10 questions.
          ii) Questions have  to be  answered  in one word  or  in  one sentence each. Each question carries one mark. 10 × 1 = 10

1. What type of magnetic behaviour is shown by  Zn 2 +   ion ?
2. Name the noble gas  which  is  not  adsorbed  by  coconut  shell  charcoal  in Dewar’s charcoal adsorption method.
3. Write  the equation  for  the chemical reaction taking place at 600°C  in  the extraction of iron by blast furnace.
4. The hydrogen electrode is dipped in a solution of pH =  1  at 25°C. What  is the potential of the electrode ? 
5. Temperature coefficient of a reaction is 2. What does it mean ?
6. Alum is used in the clarification of the muddy water. Give reason.
7. Name the end product ( B ) of the following reaction : 


8. Write the structural formula of proline.
9. Name  an  electromeric  effect  which  involves  partial  displacement  ofelectrons.
10. Give the IUPAC name of

Note : i) Answer any ten questions.
         ii) Each question carries two marks. 10 × 2 = 20

11. Draw  Ellingham  diagram  for  the  formation  of  mercuric  oxide.  With  the help of Ellingham diagram, suggest a method for the reduction of mercuric oxide.
12. Explain linkage isomerism with an example.
13. How  does  concentrated  sulphuric  acid  react  with  a  mixture  of  sodium chloride and potassium dichromate crystals ? Give the equation.

14. Write Haworth’s structure for sucrose.
15. Mention the conditions for a molecule to show geometrical isomerism.
16. Define iodine value. What is the significance of iodine value of an oil ?
17. Give any two differences between S N  1 and S N  2  mechanisms.
18. The standard free energy change of a chemical reaction is 100 kJ at 25°C. Calculate  the  equilibrium  constant  of  the  chemical  reaction  at  the  same temperature.
19. Sketch  the  unit  cell  structure  of  caesium  chloride.  What  is  the coordination number of each ion in the crystal ?
20. Define the term ‘Gold number’. What are  the Gold numbers of  gelatin and starch ?
21. i) State Raoult’s law of relative lowering of vapour pressure.
     ii) What is an ideal solution ?

22. A galvanic cell is represented as  M 1  | M n + 1       M n + 2    | M 2  . Write the half-cell reactions and cell reaction for the above cell. 

I. Answer any two of the following questions : 2 × 5 = 10

23. a) How is ammonia manufactured by Haber’s process ?  3
     b) Explain with an example Nernst’s distribution law. 2
24. a) With  the help of  valence bond  theory,  explain  the  hybridisation and geometrical shape of cuprammonium ion. 3
     b) How  is  a mixture  of  noble  gases  isolated  from  air  by  Ramsay and Rayleigh method ?  2
25. a) Explain, with a diagram, electron gas theory of metallic bond. 3
      b) What is a ligand ? Give an example of a bidentate ligand. 2

II. Answer any three of the following questions : 3 × 5 = 15
26. a) Explain the mechanism of sulphonation of benzene. 3
     b) What are triglycerides ?  1
     c) Write  chemical  equation  with  conditions  for  the  formation  of alkane nitriles from haloalkanes. 1
27. a) What is angle strain ? Calculate the angle strain in cyclopentane. 2
     b) Giving reason,  explain  the  relative  acidity  of  ethanoic  acid  and methanoic acid. 2
     c) What is a peptide bond ?  1

28. a) Explain with equations how to convert
 i) aldehyde containing no α-hydrogen  to a mixture  of  sodium salt of the carboxylic acid and alcohol
 ii) ketone into hydrocarbon. 4
      b) What is denaturation of proteins ?  1
29. a) How are the following prepared ?

i) Ethanol from methanol
ii) Carboxylic acid from alkane nitrile. 4
     b) Give  a  chemical  reaction  to  show  that  a  molecule  of  glucose contains five hydroxyl groups. 1

III. Answer any three of the following questions : 3 × 5 = 15
30.a) With  a  neat diagram,  explain  the  construction  and  working of standard hydrogen electrode. 3
    b) Calculate  the mass  of  zinc metal  deposited  from  zinc  sulphate solution by passing a current of 4 amperes for 20 minutes. ( Equivalent mass of zinc = 32·86 ) 2

31. a) A  first  order  reaction  takes  5  seconds  for  20%  completion. Calculate the time required for 60% completion of the reaction.3
     b) What is peptization ? Give one example. 2
32. a) Explain Ostwald’s  isolation method  for  the  determination  of  the order of a reaction. 2
     b)Write Gibbs equation.How do you predict  the  feasibility  of  a reaction using Gibbs equation ?  2
     c) What are Lewis bases ?  1
33. a) Explain the  application  of  common  ion  effect  and  principles  of solubility  product  in  the  precipitation  of  second  group  basic radicals. 3
     b) Define  :
                   i) Osmotic pressure
                   ii) Space lattice. 2
34. a) Derive  an  expression  for  the  velocity  constant  of  a  first  order reaction.  3
b) Calculate the lowering of vapour pressure  caused by  addition of 100 g of sucrose ( molecular mass = 342 ) to 1 kg of water if  the vapour pressure of water at 25°C is 23·8 mm of mercury. 2

D 1 
IV. Answer any one of the following : 1 × 10 = 10

35. a) i) Among  Sc 3 +  (  Atomic  number  =  21  )    and Cr 3 +  ( Atomic number =  24  )  ,  which  ion  is  coloured  and why ?  2
ii) Write the electronic configuration of oxygen molecule. 1
     b) How is phenol isolated from coal tar ?  3
     c) i) What  is  the  ratio  of  concentration  of  sodium  acetate  to acetic acid while preparing a buffer  solution of pH  =  5·7  ? ( )  K a of acetic acid is 1·8 ×  10 – 5     3
ii) Define the term ‘entropy’. 1
36. a) i) Explain  with  equation  how  concentrated  sulphuric  acid reacts with potassium bromide. 2
ii) Name  the  flux  used  in  the  extraction  of  iron  from haematite.  1
     b) i) Explain with equation of Hoffmann’s bromamide reaction. 2
ii) How  many  π  electrons  are  present  in  the  delocalised electron cloud in a benzene molecule ? 1
c) i) Write  any  two  merits  of  Arrhenius  theory  of  electrolytic dissociation.  2
ii) Calculate the pH  of  a 0·01 M solution of  acetic  acid  if  the degree of dissociation at 25°C is 0·125. 2

D 2 
V. Answer any two of the following : 2 × 5 = 10

37. a) Explain  the  laboratory  method  of  preparation  of p-bromoacetanilide from acetanilide. 3
     b) Give a test to detect ketoses. What is the name of the test ? 2
38. Describe an experiment to show the effect of temperature on  the  rate of  a reaction between  potassium  persulphate  and  potassium  iodide. 5
39. Describe the experiment to determine the mass of ferrous ammonium sulphate  crystals  present  in  one    dm 3      of  its  solution  by  using standard  potassium  dichromate  solution. Give  the  equation  for  the reaction involved.  5


                                            Kannada Version

Click Here, To Download Chemistry March, 2010 Question Paper of Both English & Kannada Version in PDF Format.


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