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  1. S

    Chemistry: Post your doubts here!

    Metanoia http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_s13_qp_13.pdf q8 the ans is D
  2. S

    Chemistry: Post your doubts here!

    qhttp://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_s13_qp_13.pdf 8
  3. S

    Chemistry: Post your doubts here!

    Won't it be x2= 4 (1-x)^2 -> x= 2(1-x) -> x= 2-2x -> 3x=2 -> x=2/3?
  4. S

    Chemistry: Post your doubts here!

    Ally PV=nRT where n= 1/18
  5. S

    Chemistry: Post your doubts here!

    B C Is 37 also B?
  6. S

    Chemistry: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_s13_qp_11.pdf 40 the answer is C
  7. S

    Chemistry: Post your doubts here!

    C
  8. S

    Chemistry: Post your doubts here!

    Is it A?
  9. S

    Chemistry: Post your doubts here!

    3%
  10. S

    Chemistry: Post your doubts here!

    D
  11. S

    Chemistry: Post your doubts here!

    You can remove a hydrogen from any if the side chains, CH3, CH3, CH3 and C2H5, but if you remove it from the methyl groups that aren't in the main chain but are attached as a side chain to carbon 2, you end up with the same product
  12. S

    Chemistry: Post your doubts here!

    No if you drew the double bond between carbons 3 and 4, the actual double bond is between carbons 4 and 5. You drew it to the right if the side chain...it's actually exactly on the other side of the side chain
  13. S

    Chemistry: Post your doubts here!

    Is 25 C?
  14. S

    Chemistry: Post your doubts here!

    Yeah I got as much, but in the answer the double bond isn't found there. It's to the left of the bond that u drew as the double bond
  15. S

    Chemistry: Post your doubts here!

    Could someone explain this?
  16. S

    Chemistry: Post your doubts here!

    But that makes a total of 7 carbons
  17. S

    Chemistry: Post your doubts here!

    C makes the most sense though. Because it can't be oxidized by kmno4 it has to be a tertiary alcohol with 3 different carbon groups attached to the central carbon
  18. S

    Chemistry: Post your doubts here!

    Oh it's cause they're in a 2:1 ratio. If one mole if sulfite loses 2 moles of electrons than 2 moles of the metal will gain two moles of electrons, meaning one mole if the metal will gain just one mole of electrons
  19. S

    Chemistry: Post your doubts here!

    Is it A?
  20. S

    Chemistry: Post your doubts here!

    Is it D?
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