• We need your support!

    We are currently struggling to cover the operational costs of Xtremepapers, as a result we might have to shut this website down. Please donate if we have helped you and help make a difference in other students' lives!
    Click here to Donate Now (View Announcement)

Search results

  1. MiniSacBall

    A level Biology: Post your doubts here!

    A simple answer is a vaccine cannot be developed, even if it is developed malaria has thousands of anitgens which mutate/ are different during their life time. So even if the vaccine is developed it will very in-effective. Because malaria has thousands of antigens which change during their life...
  2. MiniSacBall

    A level Biology: Post your doubts here!

    Well you answer is correct but you don't need to add the last line, B-cells develop into plasma cells upon next attack, which is ok but doesn't needs to be there. Because they only want how antibodies are produced. I guess you need to include T-Lymphocyte Cells, not only plasma because...
  3. MiniSacBall

    Chemistry: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_s09_qp_2.pdf Second Variant Q5 I didn't understand the question itself is it saying 2CH3CHO Or just CH3CHO And i need help for part a) oh XD :p Sorry, when i read fast i make mistakes. :(
  4. MiniSacBall

    Chemistry: Post your doubts here!

    He said at the same time not thing
  5. MiniSacBall

    Chemistry: Post your doubts here!

    Yes, both NaBH4 and H2 with nickel as catalyst. H2 with nickel is a pretty powerful reducing agent ;) or (H+) They reduce almost all of the substances.
  6. MiniSacBall

    Chemistry: Post your doubts here!

    If a reactions involves only solids, there will no Kc or Kp right?!! Also what is the color of the flame, when burning an alkane and alkene.
  7. MiniSacBall

    XtremePapers Contest 2012-2013 Winners (Finally!)

    Congrats! I am really feeling sorry. Despite of having thousands of members this thread has hardly any people congratulating them :(
  8. MiniSacBall

    Mathematics: Post your doubts here!

    Well i would be really able to help you if you could attach the qp, instead of capturing and then uploading just link to past paper and write the question you need help with. I would infact also refer to mark scheme, to help you get the answer according to your syllabus. I guess i can solve this...
  9. MiniSacBall

    Biology; Chemistry; Physics: Post your doubts here!

    What do you actually mean, i mean what exactly is your question? How can BaCl2 + HCl, react even if they react the results will be the same! Just use your mind for a second. I don't want to discourage you. But just look at it. What on the earth do you think the combination of these elements...
  10. MiniSacBall

    Mathematics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_s10_qp_11.pdf Q5 pii , piii How the heck do i find the range from domain, My freaking book sucks! ? :( Generally how do you do it. I need help please. I want part iii too, i am stuck at: cos^2...
  11. MiniSacBall

    Mathematics: Post your doubts here!

    I really needed this :). BTW how did you do i) i mean i did some thing like this: tan(pi-x) =tan(pi) -tan(x) = 0 - k =-k Is this wrong? Is that an identity? If yes, is it included in syllabus of p1, i freaking find alot of identities out of syllabus. I mean we are supposed to know only two...
  12. MiniSacBall

    Chemistry: Post your doubts here!

    Well acutally i meant some thing like this: You can find other members doing like this: "please can someone explain question 2b ii) from: papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_w13_qp_22.pdf how r the 3 structures different from each other...
  13. MiniSacBall

    Chemistry: Post your doubts here!

    It would be much better if you could link us to past papers, with question number rather than just trying to take a pic and then upload, which is much harder and confusing both for you and us.
  14. MiniSacBall

    Mathematics: Post your doubts here!

    Co-efficient of x in 1/x ,2/x, 12/x And http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Mathematics%20(9709)/9709_w05_qp_1.pdf Q9 (ii) & (iii)
  15. MiniSacBall

    Mathematics: Post your doubts here!

    xD, I just typed it randomly. :D . Thank you so much <3 http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Mathematics%20(9709)/9709_s13_qp_11.pdf Q1, Am i supposed to find the maximum and minimum point to prove that it is an increasing function. how do i do...
  16. MiniSacBall

    Mathematics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Mathematics%20(9709)/9709_s07_qp_1.pdf q4
  17. MiniSacBall

    Mathematics: Post your doubts here!

    How do i find the range of any given function, generally?
  18. MiniSacBall

    Mathematics: Post your doubts here!

    Oh god i forgot, how to find maximum and minimum point of a function. I would love simple details like 'find the derivative and then equal it to zero..bla bla' To know the if the graph has maximum / minimum or both you have to find the first derivative and then something and to know the points...
  19. MiniSacBall

    Physics, Chemistry and Biology: Post your doubts here!

    What do you mean by triangle formula of finding gradient, do you mean like finding on the graph, Just divide the (y-axis) value by (x-axis) value. That is for a graph! I guess that is what you are talking about, you have to draw two lines, one is across y-axis and other x-axis originating from...
  20. MiniSacBall

    Physics, Chemistry and Biology: Post your doubts here!

    You really need to read your text book, Most of them are simple definitions and other such description. Just read the electricity chapter. Do calculation involving a part/ whole circuit, is like, in a question with a diagram or figure. They will give you some information like the resistor has a...
Top