• 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. S

    Chemistry: Post your doubts here!

    please tell me how to do this question..i dont knw how many times i"ve posted it! but no one has answered it yet :( its Q 22 of jun11/11 if you need to refer to the paper. answer is A. PLEASE HELP ME OUT!!
  2. S

    AS Chemistry Doubts

    http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_s08_qp_1.pdf Q26!!
  3. S

    AS Chemistry Doubts

    Please help me with Q40..PLEASE. i really dont get it. http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_w09_qp_12.pdf
  4. S

    AS Chemistry Doubts

    you have to write the equation first. Ca(no3)2 -----> CaO + 2No2 + 0.5 O2 now calculate the moles of Ca(no3)2 by 4.10/164.1 you knw frm the equation the ratio of cao to ca(no3)2 is 1 :! hence moles will be same. therefore. just use mass= mr x moles and you:ll get the ans as C :)
  5. S

    Chemistry: Post your doubts here!

    http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_w09_qp_12.pdf please explain Q40!!
  6. S

    AS Chemistry Doubts

    40 A monomer undergoes addition polymerisation. A 1 mol sample of the monomer is completely polymerised. How many moles of polymer might, theoretically, be formed? 1. 1 2 10^–6 3 1/ 6.02 10^23.. this is Q40 0f...
  7. S

    Chemistry: Post your doubts here!

    Q40..http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_w09_qp_12.pdf
  8. S

    Chemistry: Post your doubts here!

    thanks. just see if you can help me with the other questions i"ve posted above. thanks again:)
  9. S

    Chemistry: Post your doubts here!

    thank you . plz explain these too.. http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_s11_qp_12.pdf in Q6..shouldnt Y be higher as the peak increases when temp is reduced? and plz explain Q 11, 19,23 as well!
  10. S

    Chemistry: Post your doubts here!

    7 Which pair of elements have bonds of the same type between their atoms in the solid state? A aluminium and phosphorus B chlorine and argon C magnesium and silicon D sulphur and chlorine why is the answer D and not A or B?
  11. S

    Chemistry: Post your doubts here!

    im not sure but how is this related to my question.. do you knw how to answer that one?
  12. S

    Chemistry: Post your doubts here!

    umm i dont understand. what exactly are you trying to say?
  13. S

    Chemistry: Post your doubts here!

    7 Which pair of elements have bonds of the same type between their atoms in the solid state? A aluminium and phosphorus B chlorine and argon C magnesium and silicon D sulphur and chlorine why is the answer D and not A or B?
  14. S

    Chemistry: Post your doubts here!

    http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_s11_qp_12.pdf in Q6..shouldnt Y be higher as the peak increases when temp is reduced? and plz explain Q 11, 19,23 as well!
  15. S

    Chemistry: Post your doubts here!

    http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_w08_qp_1.pdf Q39. how exactly do we work out the answer?
  16. S

    Chemistry: Post your doubts here!

    oh right!! got it! thanks a lot! :)
  17. S

    Chemistry: Post your doubts here!

    http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_w11_qp_12.pdf Q27..shouldnt the answer be 2 chiral centres if you consider the 2nd and 3rd carbon from the right!
  18. S

    Chemistry: Post your doubts here!

    thank you so much! i got it now! :) please explain Q17 also.
  19. S

    Chemistry: Post your doubts here!

    please explain working for Q2.. i dont get it :(and Q17 http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_w08_qp_1.pdf
  20. S

    Chemistry MCQ?

    thanks..could you please explain these as well..i"ll be grateful! http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_s11_qp_12.pdf in Q6..shouldnt Y be higher as the peak increases when temp is reduced? and plz explain Q 11, 19,23 as well!
Top