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  1. haochen

    Chemistry Paper 1 Doubts Here... !

    the first answer : lime the second answer is ammonia because it is a base so it can neutralize HCL while carbon dioxide and litmus solution cant. the third answer : Its B hope it right :D can u post the link ??
  2. haochen

    Liquid "M" !

    if it is antiseptic smell that mean it is alchohol :D
  3. haochen

    THIS or THAT

    :D
  4. haochen

    Chemistry Revision Site

    ............. check other thread
  5. haochen

    Discuss Chemistry doubts here !!!

    ask sm other question from past paper to clear ur doubt :D
  6. haochen

    CHEMISTRY. 2011 M/J REVISION

    hw much does it cost??? i think it 75SR? ? is it the purple and white one??? if it is my friend hv one :) his account name is ali123456789 and Ali4lyf (same person) in this forum. thats all the support i can give coz i dont hv the book and my scanner is not working. hope he gv u it :D
  7. haochen

    THIS or THAT

    sharingan (copying technique many evolution :D ) walking on water or jumping high from one tree to the others :P no 7th :ROFL:
  8. haochen

    Chemistry Revision Site

    it work for me :shock:
  9. haochen

    CHEMISTRY. 2011 M/J REVISION

    srry i dont hv a scanner :D why dont u just borrow one from ur friend or buy one???
  10. haochen

    Chemistry Paper 1 Doubts Here... !

    ur welcm :D
  11. haochen

    Chemistry Revision Site

    ur welcm :D thx gud luck to u too :)
  12. haochen

    Physics paper31 Leaked ?>?

    ur definitely right :D
  13. haochen

    Chemistry Paper 1 Doubts Here... !

    ur welcm :D one thng u didnt count in mind : hw many bond r there in oxygen with silicon....... 2 so silicon is boned to 4 oxygen and oxygen is bonded to 2 silicon then that make sense :D u can also do the cross multiplication Si4 ------>O2 Si2O4 (simplified) SiO2 hope u got it :D u can...
  14. haochen

    Battlefield---Revenge

    Re: WHAT IF!!! thx :D (my car when i got an extra extra extra good grade in the IGCSE exam :D) or else just a couple of electronic eg.laptop, mobile .....
  15. haochen

    THIS or THAT

    F-35 invincible or incredible?
  16. haochen

    Chemistry Revision Site

    :D
  17. haochen

    Chemistry Paper 1 Doubts Here... !

    Alpha45 is right, u can use both and they just simplified it (like alpha45 said :D ) :)
  18. haochen

    Discuss Chemistry doubts here !!!

    u heat NaCO3 ---> no reaction group 1 metal, when u heat them they dont give any product. in the exam they might asked if we heat NaCO3 , what observation will u see?? so the answer is they dont decompose or no reaction ONLY FOR GROUP 1 METAL hope u got it :)
  19. haochen

    CHEMISTRY. 2011 M/J REVISION

    all booook :shock:
  20. haochen

    Discuss Chemistry doubts here !!!

    group 1 carbonate decompose on heating so NaCO3 dont have reaction
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