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  1. Skynox

    Does anyone have IGCSE 2012 May/June papers?

    When i have them i'll post them as soon as they are available..
  2. Skynox

    Chemistry V1 (discussion)

    There were two questions: The one about the polymers was asking for the homologus series.. The other was asking for functional groups presented in a substance.
  3. Skynox

    Chemistry V1 (discussion)

    Then it was none -.-...
  4. Skynox

    Chemistry V1 (discussion)

    Yeah then to which homologus series does this compound belong to.. Again,won't make any difference when until the ms are published,won't make any difference now..
  5. Skynox

    Chemistry V1 (discussion)

    Then why did they mention the PVA > Let's wait again..
  6. Skynox

    Chemistry V1 (discussion)

    Maybe but if they were asking about the polymer..Alkene is impossible..Polymer can't belong to alkene since it is saturated..Maybe alcohol only or none at all..
  7. Skynox

    Chemistry V1 (discussion)

    How can a polymer belong to alkenes if saturated? Again lets wait :) It won't make a difference.
  8. Skynox

    Chemistry V1 (discussion)

    The question started: PVA is a polymer.Its monomer is shown below. To which compound does this compound belong? Lets wait ^^
  9. Skynox

    Chemistry V1 (discussion)

    That's not a polymer !The question was about a polymer and homologus series..
  10. Skynox

    Chemistry V1 (discussion)

    C was clearly above ph 7 by 0.5 cm or so.. To get the correct answer you should know which reagent was added.. The acide was added to the alkali So the pH decrease from 12 till it becomes acidic..
  11. Skynox

    Chemistry V1 (discussion)

    The acid was added to tha alkali not the opposite... So,at C the ph was above 7 the solution was slightly alkaline...
  12. Skynox

    Chemistry V1 (discussion)

    No one knows.. And about the acid C was before pH 7 so there was still some alkali to neutralize..
  13. Skynox

    Chemistry V1 (discussion)

    Yes it was carboxylic acid and alkene. Which functional group does this contain ^^
  14. Skynox

    Chemistry V1 (discussion)

    That's not a polymer !!
  15. Skynox

    Chemistry V1 (discussion)

    Paper 1 doesn't include the extended syllabus..Check the sy file included.
  16. Skynox

    Chemistry V1 (discussion)

    Condensation not addition...Condesation polymerization can't be included in p.1 since it is in the extended. The monomer shown doesn't belong to alchol seires even though it has OH? The general formula is completely irrelevant.. If you consider any OH is an aclohol,then NaOH is ?Alcohols are...
  17. Skynox

    Chemistry V1 (discussion)

    I dont have the QP when i have them i will post a thread.. Exactly..That's wat i said here many times... It's a condeasation polymerization..Not an addition.. The monomer shown doesn't belong to alchol seires even though it has OH? The general formula is completely irrelevant
  18. Skynox

    Chemistry V1 (discussion)

    And since a polymer is saturated then neither of them !It was asking about HOMOLOGUS SERIES not functional group.. Homologus series have same functional group and also same general formula. The monomer shown was absolutely not an alcohol. In alcohols for each Carbon atom there is 2n 1 So if it...
  19. Skynox

    Chemistry V1 (discussion)

    Check this
  20. Skynox

    Chemistry V1 (discussion)

    *It was about the diffusion diagram [C] *.It was about seperating zinc carbonate from a mixture with water [ Filtration] *It was nearly the same as this ..The answer was P,Q,R,S *.Element X has a proton number 18..Element Z has one more electron shell *It was P2Q exactly the same as Sodium oxide...
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