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  1. falcon678

    Biology; Chemistry; Physics: Post your doubts here!

    guys need help in question 15...!!! http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20O%20Level/Biology%20(5090)/5090_w06_qp_1.pdf
  2. falcon678

    Biology; Chemistry; Physics: Post your doubts here!

    carbon brushes in...????o_O
  3. falcon678

    Biology; Chemistry; Physics: Post your doubts here!

    qualitative notes r only for paper 3.......not for any othr papr...!!! howeva periodic table will be providd in papr 1 n 2...!!
  4. falcon678

    Biology; Chemistry; Physics: Post your doubts here!

    dude the salt producd is in aqueous form.......u ve to extrct it by crystalisation.....!!
  5. falcon678

    Biology; Chemistry; Physics: Post your doubts here!

    :D
  6. falcon678

    Biology; Chemistry; Physics: Post your doubts here!

    salt with watr is in crystal form n without watr is anyhydrous......it has no link with reaction...it just depends whetr u ve evaprtd to dryness the salt durin crystalisation or not...
  7. falcon678

    Biology; Chemistry; Physics: Post your doubts here!

    dude its a salt.....for a compound to be acid it shld ve hydrgn in it n it shld be dissipatd whn in aqueous form...!! yess copr chloride is blue...it chnges to pink AFTR coming in contact with water...!! n blue is its original n complete colour..!! :P
  8. falcon678

    Biology; Chemistry; Physics: Post your doubts here!

    dude am reali sori but no.....as said by spidy it goes purple AFTR reactin with protiens or amino acids...!!!
  9. falcon678

    Biology; Chemistry; Physics: Post your doubts here!

    well u ve to rote it m afraid..!!!
  10. falcon678

    Biology; Chemistry; Physics: Post your doubts here!

    solid coppr pink..sodium is silver..iron silver again...magnesium is again silver... iodine is purple...bromine brown..chlorine is green...!!
  11. falcon678

    Biology; Chemistry; Physics: Post your doubts here!

    dude it barely comes like this....!!
  12. falcon678

    Biology; Chemistry; Physics: Post your doubts here!

    :D
  13. falcon678

    Biology; Chemistry; Physics: Post your doubts here!

    ok...if v go for aqueous states itz like this (aftr addin NaOH) Copper is blue Iron(II) is green Iron (III) is brown Calcium,aluminium,lead n zinc r white... in solids all r silvry excpt for coppr wich is pink....!! hope m rite guyz!!
  14. falcon678

    Biology; Chemistry; Physics: Post your doubts here!

    dude u mixd up solids n aqueous state's colours...!!!! :P
  15. falcon678

    Biology; Chemistry; Physics: Post your doubts here!

    u askin for their colours in solid states i hope...??
  16. falcon678

    Biology; Chemistry; Physics: Post your doubts here!

    dude chem is only subjct wich cant be made fun........but v r gettin side trackd here now...:P
  17. falcon678

    Biology; Chemistry; Physics: Post your doubts here!

    thtz a nixe option...!!! :D
  18. falcon678

    Biology; Chemistry; Physics: Post your doubts here!

    just dont do this in exams.... :P got it..?? simple enough!!! :P
  19. falcon678

    Biology; Chemistry; Physics: Post your doubts here!

    sorri dude sodium cant be replcd fr a precipatate to frm... :P
  20. falcon678

    Biology; Chemistry; Physics: Post your doubts here!

    yar itz like this ke on is NaCO3....while other is NaCl....n v need to differntiatie b/t the two so tht corect labls cld be postd..!!
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