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  1. J

    how was chemistry paper 22

    Is the 24 hr period up now then?
  2. J

    Physics paper 2 Discuss and Share

    Thats strange...the only way the marking scheme makes sense is if we take this into really basic terms, meaning if voltage drop across 1200 is 5 voltage drop across x is 4 1200/5 = 240/V 4x240= 960. But Im pretty sure that cant be right...its just breaking down the whole thing into a...
  3. J

    Physics paper 2 Discuss and Share

    Since its Physics paper 22 tomorrow, i thought we could all share our queries and notes in this thread. Feel free to post notes and ask questions!
  4. J

    phy As :/

    Are there any specific chapter for which you need the formulae, or do you want ALL of them from ALL of AS? :o
  5. J

    how was chemistry paper 22

    DISCUSSION OF THE PAPER PRIOR TO THE UPLIFTING OF THE 24 HOUR PERIOD IS A BANNABLE OFFENSE ON XTREMEPAPERS. DONT BE A FOOL AND DISCUSS QUESTIONS FROM THE PAPER, RATHER, EITHER RELATE IF YOURS WENT WELL OR BADLY, OR ELSE STAY QUIET!
  6. J

    As English

    Thanks :D and im appearing from Lahore :)
  7. J

    Chem AS p21/22/23

    Some summaries i posted in the post doubt here thread of chemistry, you guys might want to give those a look: All period 3 elements react with Oxygen [except argon, ofcourse] They form oxides and burn with varying flame colors [White for MG/AL, blue for sulphur, yellow for phosphorous etc]...
  8. J

    Chemistry: Post your doubts here!

    CH3COOH + NA2CO3 -> CH3COO-Na+ + CO2 + H2O. And now im going to be moving to the AS thread or making an A2 thread for the next paper. Goodnight and good luck to you all, please do remember me in your prayers!
  9. J

    Chemistry: Post your doubts here!

    Maybe we should make a new thread specifically for P2 and later one for P4?..
  10. J

    Chemistry: Post your doubts here!

    Basically, its saying that "This is better then that just cause it is". It is actually not a part of our syllabus and if i tried explaining it i would confuse you and me both.
  11. J

    Chemistry: Post your doubts here!

    Then you would heat it with a fractional distillation set-up, whereby the volative aldehyde would be evaporated and collected off in a seperate vessel.
  12. J

    Chemistry: Post your doubts here!

    Im quite sure i've done alot of papers that featured KMnO4 in the reaction you specified :o
  13. J

    Chemistry: Post your doubts here!

    Although the mechanism for strength of oxidising agent is not involved in the A2 syllabus at all, its basically left best to say that ones mechanism of action is simply superior in speed or efficiency then the others.
  14. J

    Chemistry: Post your doubts here!

    Actually, KMnO4 is "Silently preferred" in A levels. Basically its stronger and agreed upon to be stronger by most books, so that is what is expected of you similarly, LiAlBH4 is STRONGER, but NaBH4 is more COMMONLY USED. Select at your own choice.
  15. J

    Chemistry: Post your doubts here!

    Mass spectrometer for AS is simple enough. You ionize/vaporize a sample, throw electrons at it until it loses an electron going into the +1 state, and pass it through electric field [to streamline it] and magnetic field [to make it acquire a circular pathway]. Then you change the magnetic field...
  16. J

    Chemistry: Post your doubts here!

    Bon enthalpies? You're going to have to elaborate on that :P As far as bond breaking and making is concerned, look at the following reaction: CO + 1/2O2 -> CO2. Simple enough right? Now all you have to remember is before reacting all atoms must go into their atomic gaseous state. Thus...
  17. J

    Chemistry: Post your doubts here!

    Molar mass only plays a part in diffusion rate and thus it KIND of does affect reactivity, but not really :P
  18. J

    Chemistry: Post your doubts here!

    And check this out : http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20%289701%29/9701_s03_qp_2.pdf http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20%289701%29/9701_s03_ms_1+2+3+4+5+6.pdf isnt the MP...
  19. J

    Chemistry: Post your doubts here!

    Im in A2 :o why do you ask? and alright thanks :D I was just confused because i keep involving Lattice energy in here, which is strictly A2 :P
  20. J

    Chemistry: Post your doubts here!

    Any other questions or queries guys? BTW i have a question myself. Does reactivity depend on cation SIZE or charge and if so how does it depend on it? And also, what is the difference between ALKALI and BASE?
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