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  1. H

    Observation of the reaction of period 3 elements

    sULFUR with OXYGEN burns with a pale bLUE flame....to produce colorless so2 gas with a very bad smell
  2. H

    Observation of the reaction of period 3 elements

    somebody give obs....for SILICON with oxygen PHOSPHORUS.... with CHLORINE burns with WHITE FLAME to give colorless fuming liquid pcl3.....if Chlorine is in excess then pcl5...a YELLOW solid is formed with OXYGEN White phosphorus catches fire spontaneously in air, burning with a white flame and...
  3. H

    Observation of the reaction of period 3 elements

    SILICON with CHLORINE reaction requires passing chlorine gas over heating silicon powder...a colorless volatile liquid is produced....greenish-yellow color of chlorine gas disappears with OXYGEN
  4. H

    Observation of the reaction of period 3 elements

    ALUMINUM... with chlorine PASS chlorine gas over heated aluminium.....to give yeLLow SOLID ALCL3......greenish-yellow color of chlorine disappears WITH oxygen Reaction only occurs if aluminum is powdered ...else aluminium oxide coating tends to inhibit the reaction
  5. H

    Observation of the reaction of period 3 elements

    yeah diwash..zahra dats not concisse enuf in that factsheet.others r good MAGNESIUM with OXYGEN burns with a dazzling white flame to give white solid magnesium oxide with chlorine burns with intense white flame to give white solid magnesium chloride
  6. H

    Factsheet on GROUP II

    http://www.scribd.com/collections/23009 ... -Factsheet guyx download all at once....i hav given u the link
  7. H

    Physics Practical/33 Info confirmation required

    http://www.xtremepapers.me/CIE/Internat ... 2_qp_3.pdf
  8. H

    Physics Practical/33 Info confirmation required

    well...if oscillation for 1st question then main points.... table....with correct headings and showing unit with each quantity...1 mark same no. of d.p in raw data s.f same as or one more in processed data.... in oscillations practical....at each independent variable ...u must perform a repeat...
  9. H

    biology theory p 22.....tense situation.....

    ya i believe its enuff..bt do oct nov 2010 wid special care
  10. H

    maths 9709

    well just use 2T COS 30=3
  11. H

    Mechanics M/j 05

    well....use formula power =W.D/T..to find work done by car..... whenever work is done it increase energy of body whether it be kinetic as in this case or potential......but some enrgy cn also be lost ddue to W.D against friction......we cnt directly use W.D by engine to find distance...since...
  12. H

    biology theory p 22.....tense situation.....

    guyx i have threee days non-stop eexams...xhem theory mechanics physics practical and then bio thoery.....just need advise how i shud revise bio solve last 4 years past pprs........or revising some keypoints i have noted on notebook......
  13. H

    bio p 22..........

    need tips onto writing ansers.......cos i see tonnes of marking scheme points on every question
  14. H

    Your votes for the next XPF Moderators?

    vote 4 me guyxxxxxx............wat u waitin for
  15. H

    Chem p33 confirmations

    tell me wat was ur mass lost in heating....and how u calculated purityyy
  16. H

    How did Chem Paper 33 went???

    aquarian gurl tell me jxt percentage purity......and just tell me wat were steps....u followed....see i did like this....calculated moles of water lost......then calculated moles of mgso4.....then calculated mass of mgso4 + watewr in it and expressed it as a percentage
  17. H

    How did Chem Paper 33 went???

    yar u ppl just tell me this....wat we had to do after adding fiive drops conc..sulfuric acid.....we had to add water to it ryt....or i misread.....???
  18. H

    chem pp33 discussion!!!

    and also solid moved around and fizzed in the tube....this observation which ll lead u to testing for a gas
  19. H

    Physics Practical/33 Info confirmation required

    SO LETS POST ERRORS FOR OSCILLATIONSSS
  20. H

    How did Chem Paper 33 went???

    i wrote barium nitrate,............WTH
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