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  1. S

    Chemistry MCQ?

    http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_w11_qp_12.pdf please explain 26..
  2. S

    AS Chemistry Doubts

    guys please explain this! im posting it for the second time now! 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!
  3. S

    Chemistry MCQ?

    please tell me in this question.. how is nitrogen undergoing a redox reaction??http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_s11_qp_12.pdf Q35 of this paper
  4. S

    AS Chemistry Doubts

    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!
  5. S

    AS Chemistry Doubts

    http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_s11_qp_11.pdf please explain 15, 16 ,22..PLEASE!
  6. S

    AS and A level Physics Coursebook. answers?

    anyoneee???
  7. S

    AS Chemistry Doubts

    i still dont get why the answer is A! could you please explain! in rxn 1 water donates proton hence its an acid..therefore Hso2 will be its conjugate base. ok this makes sense. in rxn 2 Hso3 is losing its proton so doesnt that make it an acid? its rxn two in confused in if anyone could help me...
  8. S

    Lets Solve A's chem MCQ paper together.

    in Q8.. i do understand the first equation.. however in the second one HSO3 is losing H+ so doesnt it make an acid??
  9. S

    AS and A level Physics Coursebook. answers?

    hey guys.. the physics coursebook by david sang..does anyone have answers to end of chapter questions and exam style questions.. the CD doesnt have them! :(
  10. S

    Chemistry: Post your doubts here!

    please tell me how is the answer D?
  11. S

    AS Chemistry Doubts

    this one also please.. the answer is B
  12. S

    A2 Biology | Post your doubts here

    THANKS A LOT! :)
  13. S

    AS Chemistry Doubts

    thanks a lot! please tell me this one also.. 24 Compound X on reaction with hot concentrated sulphuric acid gave a mixture of three alkenes. What could X be? A butan-2-ol B propan-2-ol C 2-methylbutan-2-ol D 2-methylpropan-2-ol hows the answer A?
  14. S

    AS Chemistry Doubts

    .8 The equation below represents the combination of gaseous atoms of non-metal X and of hydrogen to form gaseous X2H6 molecules. 2X(g) + 6H(g) -----> X2H6(g) ^H = –2775 kJ mol The bond energy of an X–H bond is 395 kJ mol . What is the bond energy of an X–X bond? A – 405.0 kJ mol B – 202.5...
  15. S

    AS Chemistry Doubts

    please tell me why is the answer A and not B?
  16. S

    AS Chemistry Doubts

    http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_s11_qp_22.pdf In the first question part iv we calculate the no.of moles of NaOH that REACT with ethanoic acid right?? so shouldnt the equilibrium moles be 0.1 - 0.04 therefore giving...
  17. S

    General Paper

    where do we get gp essays from?
  18. S

    Lets Solve A's chem MCQ paper together.

    so how"d it go guys?
  19. S

    A2 Biology | Post your doubts here

    could someone please explain lac operon?
  20. S

    Lets Solve A's chem MCQ paper together.

    your explanation does make sense but the answer is B as per the marking scheme..
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