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  1. F

    AS Biology P1 MCQs Preparation Thread

    But you aren't seeing the membranes. Your simply looking at the lines of the cell which you can see. And which are 300nm apart
  2. F

    AS Biology P1 MCQs Preparation Thread

    But resolution= wavelength / 2. So the resolution of a 600nm wavelength should give a 300nm resolution. And since resolution is the ability to distinguish between 2 points then 2 membranes 300 nm apart should be seen as separate points.. Right?
  3. F

    AS Biology P1 MCQs Preparation Thread

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Biology%20(9700)/9700_w12_qp_11.pdf Q5 why is c wrong?
  4. F

    AS Biology P1 MCQs Preparation Thread

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Biology%20(9700)/9700_w12_qp_12.pdf Q10. Can someone explain why it's C and not A?
  5. F

    Chemistry P1 Challenging Questions Preparation

    http://papers.xtremepapers.com/CIE/... AS Level/Chemistry (9701)/9701_w10_qp_12.pdf Q7 Please help
  6. F

    Chemistry P1 Challenging Questions Preparation

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_s12_qp_12.pdf Q10 why is it b and not c?
  7. F

    Chemistry P1 Challenging Questions Preparation

    http://papers.xtremepapers.com/CIE/... AS Level/Chemistry (9701)/9701_w11_qp_12.pdf Q10? http://papers.xtremepapers.com/CIE/... AS Level/Chemistry (9701)/9701_w10_qp_12.pdf Q7 Please help
  8. F

    Chemistry P1 Challenging Questions Preparation

    http://papers.xtremepapers.com/CIE/... AS Level/Chemistry (9701)/9701_w11_qp_12.pdf Q10? http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_w10_qp_12.pdf Q7
  9. F

    Chemistry P1 Challenging Questions Preparation

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_s10_qp_11.pdf Q6. How?
  10. F

    Chemistry P1 Challenging Questions Preparation

    But it says in a single reaction. A free radical substitution won't change a H to D atom
  11. F

    Chemistry P1 Challenging Questions Preparation

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_w10_qp_12.pdf Q7?
  12. F

    Chemistry P1 Challenging Questions Preparation

    Thanks a lot :D
  13. F

    Chemistry P1 Challenging Questions Preparation

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_w11_qp_12.pdf Q10?
  14. F

    Chemistry P1 Challenging Questions Preparation

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_s06_qp_1.pdf Q38. How is statement 2 correct?
  15. F

    Chemistry P1 Challenging Questions Preparation

    Sorry I actually meant like other formulas that we haven't done in chemistry. Other than kp kc calculations and the formulas for moles. Like the density equation and others like that? If there are any
  16. F

    Chemistry P1 Challenging Questions Preparation

    Thank you so much. One more thing are their any other formulas behind like kc kp formulas for moles that we should know?
  17. F

    Chemistry P1 Challenging Questions Preparation

    How do you know that density/ mass is 1/volume? And why is 2 wrong?
  18. F

    Chemistry P1 Challenging Questions Preparation

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_s11_qp_12.pdf How would you do question 33? :S Please help
  19. F

    AS Biology P1 MCQs Preparation Thread

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Biology%20(9700)/9700_w11_qp_11.pdf Q40
  20. F

    AS Biology P1 MCQs Preparation Thread

    Thank you :D really appreciate it :D one more question: Q26 from http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Biology%20(9700)/9700_s10_qp_11.pdf what does the question ask? like water potential before or...
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