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  1. malay

    Biology; Chemistry; Physics: Post your doubts here!

    thankyou...
  2. malay

    Biology; Chemistry; Physics: Post your doubts here!

    Which equation describes the most suitable reaction for making lead sulphate? A Pb + H2SO4 → PbSO4 + H2 B PbCO3 + H2SO4 → PbSO4 + CO2 + H2O C Pb(NO3)2 + H2SO4 → PbSO4 + 2HNO3 D Pb(OH)2 + H2SO4 → PbSO4 + 2H2O ms says its C buh why not D??:confused:
  3. malay

    Biology; Chemistry; Physics: Post your doubts here!

    thanx a bunch(y)
  4. malay

    hehe..(^_~) i know....THANKYOU =D =D =D

    hehe..(^_~) i know....THANKYOU =D =D =D
    • malay
    • Profile post comment
  5. malay

    10XX:D..m honored u like it:Pp n yeah for the editing i used loonapix and photoscape...

    10XX:D..m honored u like it:Pp n yeah for the editing i used loonapix and photoscape...
    • malay
    • Profile post comment
  6. malay

    Biology; Chemistry; Physics: Post your doubts here!

    no prob:D
  7. malay

    Biology; Chemistry; Physics: Post your doubts here!

    well... herez wat i do 1-find the difference between values given 2-apply number sequence rules make a guess i cant explain it any further without a question...:p
  8. malay

    Biology; Chemistry; Physics: Post your doubts here!

    Q/9 http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20O%20Level/Chemistry%20%285070%29/5070_w09_qp_1.pdf how come the answer is D?:confused:
  9. malay

    Biology; Chemistry; Physics: Post your doubts here!

    nope its not at all necessary they usually ask to estimate boiling points of certain substances when others are already given...
  10. malay

    Biology; Chemistry; Physics: Post your doubts here!

    if u can den go ahead..why not?!:p
  11. malay

    Biology; Chemistry; Physics: Post your doubts here!

    no prob:D
  12. malay

    Biology; Chemistry; Physics: Post your doubts here!

    thaanxx....
  13. malay

    Biology; Chemistry; Physics: Post your doubts here!

    3 Which reagent could be used to distinguish between dilute nitric acid and dilute hydrochloric acid? A aqueous barium chloride B aqueous silver nitrate C aqueous sodium hydroxide D copper(II) carbonate with reason...
  14. malay

    Biology; Chemistry; Physics: Post your doubts here!

    about soaps no they r basic! for notes check this http://sites.google.com/site/urbangeekclassroomsg/chemistry-classroom/organic-chemistry#TOC-Synthetic-Macromolecules hope it helps...
  15. malay

    Biology; Chemistry; Physics: Post your doubts here!

    k my apologies sir.. m(_ _)m..wont happen again
  16. malay

    Biology; Chemistry; Physics: Post your doubts here!

    wev got next 3 days for preparation..so its only normal to not study today:p
  17. malay

    Biology; Chemistry; Physics: Post your doubts here!

    its ok (y) mez also watchin NARUTO..lazy me..dont feel like studyin:D
  18. malay

    Biology; Chemistry; Physics: Post your doubts here!

    umm..not sure but your candidate number and name is already mentioned on it so i guess it will be fine....
  19. malay

    Biology; Chemistry; Physics: Post your doubts here!

    in C ammonium hydroxide is formed not ammonia in D ammonia gas is produce recall the test for anions thus red litmus paper turns blue so D is the right ans....
  20. malay

    Biology; Chemistry; Physics: Post your doubts here!

    a: moles of HCl mol=molarity (mol/dm3).volume(dm3) =1.5*25/1000 =0.0375mol than frm eq as 2 mol of HCl produce 1 mol of CO2 0.0375/2=0.01875mol of Co2 r produced now use formula Volume=mol*24dm3 =0.01875*24 =0.45dm3 of CO2 is produced-Ans b: as...
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