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  1. sj0007

    Physics, Chemistry and Biology: Post your doubts here!

    U are correct
  2. sj0007

    Physics, Chemistry and Biology: Post your doubts here!

    What did u do in the wood thingy? :)
  3. sj0007

    Physics, Chemistry and Biology: Post your doubts here!

    I wrote that wood may have a low carbon content producing less carbondioxode (I am probably going to lose a mark or two in this ques) U?
  4. sj0007

    Physics, Chemistry and Biology: Post your doubts here!

    Yay!
  5. sj0007

    Physics, Chemistry and Biology: Post your doubts here!

    Yessss! Even I was confused at first but I put it as decrease cuz it was an exothermic reaction................ wbu?
  6. sj0007

    Physics, Chemistry and Biology: Post your doubts here!

    Same, cuz like they told us to write the most reactive first!
  7. sj0007

    Physics, Chemistry and Biology: Post your doubts here!

    Yeah, so W can exist as native element and be reduced by carbon at the same time cuz it is lower than carbon in the reactivity series (any thing below carbon can be reduced by it)
  8. sj0007

    ~~jokes?? in here?? really??

    Hahahaha........... LOL! It must be that chocolate cake!
  9. sj0007

    ~~jokes?? in here?? really??

    Awww..... thnx! U r sooo sweet!!! <3 :)
  10. sj0007

    How were Chemistry Paper 11 and 31 May/June 2015

    No, the answer is lime....... calcium oxide........... :)
  11. sj0007

    ~~jokes?? in here?? really??

    Oh god, I broke into a huge smile after watching that!!!!!!!!!!!!
  12. sj0007

    How were Chemistry Paper 11 and 31 May/June 2015

    They werent that hard............................ Anyways mine were great!
  13. sj0007

    Physics, Chemistry and Biology: Post your doubts here!

    Exactly!!!!! All the three papers were veryyyyyyyy easyyyyyyyyyyyyy!!!! In Shaa Allah, we all will ace the exam!
  14. sj0007

    Physics, Chemistry and Biology: Post your doubts here!

    See here: https://www.xtremepapers.com/community/threads/physics-chemistry-and-biology-post-your-doubts-here.11053/page-405#post-911043 I had answered the same ques
  15. sj0007

    Physics, Chemistry and Biology: Post your doubts here!

    By potassium mangnate? I dont think its required but It depends whether the permanganate is a) in excess and b) has been sufficiently acidified. C2H5OH ---MnO4------> CH3CHO + H20 CH3CHO ---MnO4------> CH3COOH ^I googled the answer............ :)
  16. sj0007

    Physics, Chemistry and Biology: Post your doubts here!

    GOOD LUCK EVERYONE!!!
  17. sj0007

    Physics, Chemistry and Biology: Post your doubts here!

    :) .............. its possible!
  18. sj0007

    Physics, Chemistry and Biology: Post your doubts here!

    In exothermic, since heat is given off, the products have a lower energy In endothermic, heat is absorbed causing the products to have a higher energy
  19. sj0007

    Physics, Chemistry and Biology: Post your doubts here!

    What if its a typing mistake? Maybe they meant butene or it involves chemistry higher than the level of igcse coz as far as I have studied the polymerisation is for alkenes
  20. sj0007

    Physics, Chemistry and Biology: Post your doubts here!

    It cant be! As far as I know, in polymeristaion the double bonds break and form continuous chains............. or something...........so its definately not alkanes!
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