• 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!

  2. S

    Chemistry: Post your doubts here!

    How do you draw the repeating unit? I never seem to get these questions right, is there a certain method to use? How do you know what’s on the side chain?
  3. S

    Chemistry: Post your doubts here!

    Generally yes, it’s useful to understand the concept of partial pressure , especially for paper 5, kc is extremely important for a levels , I see a lot of kc questions in the past papers,
  4. S

    Chemistry: Post your doubts here!

    Why doesn’t compound A react with Al2O3 or acidified K2Cr2O7? Shouldn’t it get oxidized ?
  5. S

    Chemistry: Post your doubts here!

    For the addition of excess bromine , why does bromine not attack the right most end of the benzene ring ? It only reacts with the left ring, why not the right hand side ring ?
  6. S

    Chemistry: Post your doubts here!

    The most electronegative in order would be abenzene ring Then you have the CO double bond Fluorine Oxygen Nitrogen Those are all which I know of
  7. S

    Chemistry: Post your doubts here!

    The proton bonded to a benzene ring will always be most electronegative out of all the other atoms , even the ones which are bonded to OH are not as electronegative as the one bonded to a benzene ring
  8. S

    Chemistry: Post your doubts here!

    Guys for the first image, in bi) how do you know what reacts with cold Hcl and cold naoh? Like I thought carboxylic acid reacts With cold Hcl but apparently only amine reacts with it, and for biii) I understand the functional groups for solubility in Hcl but how do you know which functional...
  9. S

    Chemistry: Post your doubts here!

    So if there was no double bond nothing would be added there right?
  10. S

    Chemistry: Post your doubts here!

    For this compound Q, if we add excess Bromine , why does bromine get added to the right end side? I thought it was only on the benzene ring but in the marking scheme they said bromine is added on benzene and on the right end side
  11. S

    Chemistry: Post your doubts here!

    Also for this one , why is N zero order, why not first? Thanks a lot in advance
  12. S

    Chemistry: Post your doubts here!

    For step 4: why is the reagent aqueous Hcl and heat? We are turning amide to amine so shouldn’t it be reduction with LiAlH4?
  13. S

    Chemistry: Post your doubts here!

    Can someone help with this winter 2009 paper? Question 7, I got how to get carbon and hydrogen but how do you find the number Of oxygen and the overall structure of the compound ?
  14. S

    Confused about studying in Pakistan??

    I’m a Pakistani currently studying in Dubai, I have completed my igcse and as level in Dubai and plan on doing a levels in Dubai itself next year, afterwards i will be moving to Pakistan to study in university. Regarding my situation am I required to have done Islamic, pak studies and Urdu in...
  15. S

    Mathematics: Post your doubts here!

    Can anyone help with a) part, I understand how to form equation for A, but not B
View older results
Top