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  1. Dukula Jayasinghe

    How Was Chemistry Paper 22, MAY/JUNE 2017?

    y Yeah, same thing.
  2. Dukula Jayasinghe

    British Council is jealous of my sweets >:^(

    This invigilator sux!
  3. Dukula Jayasinghe

    How was marine science paper 1 and 2 9693?

    How was it guyz?
  4. Dukula Jayasinghe

    Physics PAPER 33 HOW DID IT GO?

    Hence, you will loose 1~3 marks only. Error carried forward is awarded. Great!
  5. Dukula Jayasinghe

    Physics PAPER 33 HOW DID IT GO?

    This is more than enough. You will receive 100% marks if you get this answer.Good job!
  6. Dukula Jayasinghe

    How Was Chemistry Paper 22, MAY/JUNE 2017?

    Yeah. The question was effectively not clear. They asked the equations for the catalytic conversions of NO2 in formation of acid rain. So I wrote both. BTW, I guess yeah, you will receive 2 marks.
  7. Dukula Jayasinghe

    How Was Chemistry Paper 22, MAY/JUNE 2017?

    Hi, um I got paper 34. The chemistry practical teacher said that paper 33 will be easier than 34, but that comment is not reliable. I guess you might come across organic analysis cos I saw the teacher taking in Felings solution and huge flask of 2,4 DNPH into the room. But this might be for...
  8. Dukula Jayasinghe

    How Was Chemistry Paper 22, MAY/JUNE 2017?

    You will receive full mark for this.
  9. Dukula Jayasinghe

    How Was Chemistry Paper 22, MAY/JUNE 2017?

    The Nitrogen equations was as follows : NO2 + SO2 --> NO + SO3 SO3 + H2O--> H2SO4 NO + 1/2 O2 --> NO2 (2 marks)
  10. Dukula Jayasinghe

    How Was Chemistry Paper 22, MAY/JUNE 2017?

    You must write the percentage composition of HBr will decrease in the mixture. That is what they asked for. I guess you will get 3 marks though.
  11. Dukula Jayasinghe

    How Was Chemistry Paper 22, MAY/JUNE 2017?

    The percentage decomposition rate will increase. Since the forward reaction is endothermic, increasing the temperature shifts the position of equilibrium to the right hand side producing more yield of the compound(s), so the percentage of HBr decomposed will increase and the percentage of HBr in...
  12. Dukula Jayasinghe

    How Was Chemistry Paper 22, MAY/JUNE 2017?

    They say write the name of the compound, not the formula. Since it was as easier paper, they wont award marks probably.
  13. Dukula Jayasinghe

    Physics PAPER 33 HOW DID IT GO?

    T The average value of results for 'g' varied from 1 ms-2 to 20 ms-2. So if your answers are in this range, you dont have to worry. However, since you got a 500 ms-2 for 'g' that is applicably too high. Hence, there is an error in your graph. Your graph is incorrectly plotted through scaling...
  14. Dukula Jayasinghe

    How was Mathematics 9709/12 ?

    i guess i will get around 68~70 marks for this paper
  15. Dukula Jayasinghe

    Cambridge International Examinations Topical Past Papers

    Hey guyz, I have created topical past papers; Please state whether its good! CHEMISTRY PHYSICS MATHEMATICS Topical past papers will be updated soon....
  16. Dukula Jayasinghe

    AS Student 2017

    AS Student 2017
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