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  1. Eugene99

    Alevel Chemistry oct/nov 2015 ms 21

    here
  2. Eugene99

    A level Biology: Post your doubts here!

    no, just AS
  3. Eugene99

    A level Biology: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Biology%20(9700)/9700_s08_qp_32.pdf Anyone solved this?
  4. Eugene99

    Chemistry: Post your doubts here!

    seems like we two wrote the same thing at the same time xD
  5. Eugene99

    Chemistry: Post your doubts here!

    Even endothermic reacctions occur spontaneously. Actually, the spontaneity of reaction is determined by 2 factors: changes in enthalpy, Δ H and entropy. Though, mostly it's the Δ H that determines the spontaneity but even entropy matters, so since 3 says 'Only exothermic reactions can be made...
  6. Eugene99

    Mathematics: Post your doubts here!

    GOt that!! just needed a li'l bit of activation energy to start the topic!
  7. Eugene99

    Mathematics: Post your doubts here!

    so for the (i) it's (3C1) (5C1 x 2C1) (3C1) = (3)(5x2) (3) =90 and for (ii) 3C1 (5C1 2C1) 3C0 + 3C1 (5C0 2C0) 3C1 + 3C0 (5C1 2C1) 3C1 and so becomes 69 but I've no idea how we got this! somebody help please :(
  8. Eugene99

    A level Biology: Post your doubts here!

    lol, yes they are confusing sometimes
  9. Eugene99

    A level Biology: Post your doubts here!

    R, in markschemes, means Reject and you answered perfectly well...They mean that if candidate mentioned only 'cytoplasmic' and did not include vacuoles then reject, but since you mentioned vacuoles as well, so you get the credit
  10. Eugene99

    Secnds turn into minutes,minutes into hours, hours into weeks,weeks into months and months into...

    Secnds turn into minutes,minutes into hours, hours into weeks,weeks into months and months into YEARS.Life is too fast, no rewind, no replay
  11. Eugene99

    Mathematics: Post your doubts here!

    This you have to imagine in mind first or just sketch out so that you have an idea what the question means. when you draw out, you will see that the point (-1,3) and the point R if joined together will form a line exactly perpendicular to the line in which R is reflected. Since we are given...
  12. Eugene99

    Mathematics: Post your doubts here!

    This can more easily be solved by finding a general term first, General term T(r+1) = 6Cr (2x)^6-r (-1/2x)^r collect only powers of x now: (2x^6-r) (1/2x^r) sums up to x^6-r/x^r =x^6-2r Now, since we want to find the...
  13. Eugene99

    A level Biology: Post your doubts here!

    yes exactly :)
  14. Eugene99

    A level Biology: Post your doubts here!

    yup. get that now :) yeah you are right, will read er n future as well, thank you
  15. Eugene99

    A level Biology: Post your doubts here!

    Actually, I read that in a mark scheme of a paper 2, that nuclear envelope reforms during cytoknesis. MCQs are just soo confusing! :(
  16. Eugene99

    Mathematics: Post your doubts here!

    No. of ways of arranging 3 cards without restriction (also found in iii) = 9C3 x 3! = 504 ( Two cards out of 3 are green and pink together) = 7C1 x 1C1 x 1C1 x 2P2 x 2P2...
  17. Eugene99

    A level Biology: Post your doubts here!

    Nuclear envelope also reforms during cytokinesis, why is it C?
  18. Eugene99

    A level Biology: Post your doubts here!

    What do they mean by reducing water potential gradient?
  19. Eugene99

    A level Biology: Post your doubts here!

    Why can't it be cholera? Only sickle cell anemia and tuberculosis can genetically be transferred but the answer is B when A is equally likely
  20. Eugene99

    Chemistry: Post your doubts here!

    no, it's very pale pink, not really pink. I just googled and see the one in the image: https://www.google.com.pk/#q=manganese+sulfate mine is exactly the same color but it's labelled magnesium sulfate only and with the formula MnSo2 which is probably wrong MnSO2 is no salt xD, these labels...
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