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Search results

  1. iKhaled

    Chemistry Paper 4-theory- doubts =D

    ok guys a question..whoever gets it correct without cheating :P gets a free candy or a cookie ur choice what is the test that will distinguish methanol from ethanol ?
  2. iKhaled

    Chemistry Paper 4-theory- doubts =D

    lol yeah i spent like 30 mins on this question figuring out why the mark scheme is saying the complete opposite and at the end i dont know why..i bet the examiner is a foolish inspector so he doesn't know these kind of stuff :P
  3. iKhaled

    Chemistry Paper 4-theory- doubts =D

    this might help
  4. iKhaled

    Chemistry Paper 4-theory- doubts =D

    did the forums lagged for u guys now or was it only me ???
  5. iKhaled

    Chemistry Paper 4-theory- doubts =D

    who hates "what do u understand by the term or define blabla" questions? :P YUUCKK
  6. iKhaled

    Chemistry Paper 4-theory- doubts =D

    methyl ketone compounds..can be any compound
  7. iKhaled

    Chemistry Paper 4-theory- doubts =D

    i hope tomorrow we don't get anything about chromatography and NANOTECHNOLOGY..any nanotech question will be left completely blank by me :S
  8. iKhaled

    Chemistry Paper 4-theory- doubts =D

    thanks a lot man and i hope your papers goes well tomorrow too !
  9. iKhaled

    Chemistry Paper 4-theory- doubts =D

    haha yeah *facepalm*
  10. iKhaled

    Chemistry Paper 4-theory- doubts =D

    wow thanks a lot for the prayer and same goes to u..inshAllah anyway for the xray-crystallography is that it only detects areas in the structure with high electron density and hydrogen has only one electron in its structure so it has a very low electron density that the xray can't detect it
  11. iKhaled

    Chemistry Paper 4-theory- doubts =D

    oh okay xray.. when u talk about that do u mean xray-crystallography ? and NMR concept is that it provides an external magnetic field where the hydrogen nucleus in the molecular environments of the organic compound spin in the direction of the magnetic field or against the direction of the...
  12. iKhaled

    Chemistry Paper 4-theory- doubts =D

    come on answer without cheating! dont open the book
  13. iKhaled

    Chemistry: Post your doubts here!

    idk man thats how i see it when i did the titration and then when u add excess of KMno4 it goes completely dark purple
  14. iKhaled

    Chemistry Paper 4-theory- doubts =D

    PhyZac are u testing her or u need help lol ? :S
  15. iKhaled

    Chemistry: Post your doubts here!

    F For 4bi..u never did that titration in ur life ?
  16. iKhaled

    Mathematics: Post your doubts here!

    how to integrate the first part of question 10..10(i) http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_w11_qp_33.pdf
  17. iKhaled

    Mathematics: Post your doubts here!

    -ln4-ln2 = -(ln4+ln2) = -ln(4x2) = -ln8
  18. iKhaled

    Mathematics: Post your doubts here!

    alright, fortunately i only know the answer to the first part and third part but i am sorry i can't find the correct solution of the second part.. (i) u substitute the equation of line l in the equation of plane p since they both intersect so (i+6j-3k+s(i-2j+2k)-3i)(2i-3j+6k) = 0...
  19. iKhaled

    Mathematics: Post your doubts here!

    anytime (y)
  20. iKhaled

    Mathematics: Post your doubts here!

    y do we shade the region below the prepen and not above it?
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