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Search results

  1. Saad Mughal

    Chemistry P1 and P2 today

    I find it easy if you have sufficient practice (except Relative Velocity).
  2. Saad Mughal

    Biology; Chemistry; Physics: Post your doubts here!

    A potential divider works this way, if the resistance increases, the voltage also increases; if the resistance decreases, the voltage decreases.
  3. Saad Mughal

    Chemistry P1 and P2 today

    Yeah. And I've been in the midst of it. :oops:
  4. Saad Mughal

    Chemistry P1 and P2 today

    :) Oh, I've left the 2011-2012 papers for before the paper (since the IGCSE papers are same). Electronic - the chapter itself is hard. The past papers are very easy.
  5. Saad Mughal

    Chemistry P1 and P2 today

    Lol, which chapter in Add.maths? I solved the whole classified before my mocks and got A LOT of practice ALHUMDULILLAH. Electronics (except CRO) is optional, if you want to leave it out then leave it (although it's surprisingly easy).
  6. Saad Mughal

    Chemistry P1 and P2 today

    I worry... a lot sometimes. :( How's Physics preparation going?
  7. Saad Mughal

    Maths, Addmaths and Statistics: Post your doubts here!

    Yeah, it's correct too. Try to rotate the images (using Windows Photo Viewer) before uploading. It's kinda hard to turn my head and check. :P
  8. Saad Mughal

    Chemistry P1 and P2 today

    Well, I probably should, I'm getting depressed now, doubting my ability to even get an A*. But Physics and Maths are easier for me so I'll just practice past papers now.
  9. Saad Mughal

    Maths, Addmaths and Statistics: Post your doubts here!

    Yeah, it's correct. (y) Your drawings are way too light. :confused:
  10. Saad Mughal

    Maths, Addmaths and Statistics: Post your doubts here!

    Use 4 significant figures in ALL your working and give ANSWERS to 3 significant figures unless otherwise stated. Give all angles to 1 decimal place.
  11. Saad Mughal

    Chemistry P1 and P2 today

    Yeah, that's what I'm saying. Your answer is correct.
  12. Saad Mughal

    Chemistry P1 and P2 today

    I'm talking about another method for preparing Ethanol.
  13. Saad Mughal

    Chemistry P1 and P2 today

    It was of 2 marks, you had to mention at least 2 of these: - oxidizing with an oxidizing agent. - colour change. - no bunsen burner used since ethanol is flammable. - apparatus description.
  14. Saad Mughal

    Chemistry P1 and P2 today

    I wrote colored compound. It's a life saving property! :D Don't worry, you might still get the mark.
  15. Saad Mughal

    Chemistry P1 and P2 today

    It's not wrong since all ionic compounds have a high melting point but it's a general property of ionic compounds, I think they wanted us to answer according to the transition metal, vanadium. But still, nobody can be sure!
  16. Saad Mughal

    Maths, Addmaths and Statistics: Post your doubts here!

    Angle of Elevation = Angle BEC If you calculated CE correctly then, tan BEC = BC/CE Put the values and calculate the angle, that's your answer.
  17. Saad Mughal

    Chemistry P1 and P2 today

    I didn't attempt that. If you can give me the equation and parts, I'll tell you the answers.
  18. Saad Mughal

    Maths, Addmaths and Statistics: Post your doubts here!

    Just use the class widths that are given. You've divided them incorrectly. Using this you're frequency densities should be: 35-40 : 3 40-45 : 4 45-50 : 6 50-55 : 7 55-60 : 5.6 60-70 : 1.2 The last 4 are correct, just make the correction to the size of the last block and to the first two...
  19. Saad Mughal

    Maths, Addmaths and Statistics: Post your doubts here!

    You're histogram is confusing, it doesn't have proper frequency density, what class width did you take? :confused: The last bit in the histogram 60-70 is extended to 75, correct that too. The cumulative curve is fine.
  20. Saad Mughal

    Chemistry P1 and P2 today

    B10, last answer was 0.0945 g. A6, a green ppt. was not seen, in fact, the solution turned green. B7, last part, you also needed to mention that the speed of the reaction doubled because of more effective collisions. Since it carried 2 marks. Nice work by the way, compiling the answers to one...
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