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  1. R

    Chemistry: Post your doubts here!

    http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_s03_qp_2.pdf how do we do qs 1b(i)???
  2. R

    Chemistry: Post your doubts here!

    the pressure is halved or lowered so equilibrium will go in the direction of greater moles that is the right hand side which has 3 moles :)
  3. R

    How many significant figures do we give for values in chemistry?????

    Any method of knowing which bond will go out of the surface and which bond will go into the surface?
  4. R

    How many significant figures do we give for values in chemistry?????

    hmmm ill give u a question: http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_w11_qp_23.pdf Now in question 2bii) how will we draw the 3d structure?
  5. R

    How many significant figures do we give for values in chemistry?????

    ok man! okay man now can u tell me how to draw 3d structures of hydrocarbons ?
  6. R

    How many significant figures do we give for values in chemistry?????

    http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_w11_qp_23.pdf In question no.2 how many significant figures shoud be given for the moles? SHould the same no. of significant figures be given for the whole question?
  7. R

    How many significant figures do we give for values in chemistry?????

    hey guys! help me out im really confused how many significant figures to give in the values.Sometime 2 sig fig are given and sometime 3 or 4 significant figures. Please somebdy help me
  8. R

    Chemistry: Post your doubts here!

    http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_w11_qp_21.pdf Qs3d) Why havent we taken the bond energies of Co2 and H2O to calculate the answer?
  9. R

    Chemistry: Post your doubts here!

    hey can any1 help me in drawing 3d stuctures of hydrocarbons. i just need some tips or some sites where i can learn to draw them
  10. R

    Physics: Post your doubts here!

    http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_s08_qp_2.pdf Qs 6b iv) The circuit will become series when switch s1 and s2 are closed. But im using this formula V=IR to calculate the current which is coming 6.25A. then im using...
  11. R

    Physics: Post your doubts here!

    Wow the notes are awsum more please :))
  12. R

    Chemistry: Post your doubts here!

    How do we make a 3-dimensional structure for hydrocabons? Need help quickly please
  13. R

    http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry...

    http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_w11_qp_11.pdf qs 8) My answer is coming C
    • raamish
    • Profile post comment
  14. R

    http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry...

    http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_w11_qp_11.pdf
  15. R

    AS Chemistry Doubts

    It is said in the question that the alcohol is unbranched so it will not have any isoemrs. hence its formula will be : (oh)ch2ch2ch2ch2(oh) so OH groups are attached to 1st and 4th carbon atoms :))) Now please help me in my qs as well.
  16. R

    Can u help me in doing moles IN chemistry practicals. I dont have enough days to undrstand them...

    Can u help me in doing moles IN chemistry practicals. I dont have enough days to undrstand them properly so can i asku questions abt it????
  17. R

    AS Chemistry Doubts

    http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_w11_qp_12.pdf Qs 10 plzz help
  18. R

    AS Chemistry Doubts

    http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_w09_qp_11.pdf Qs 23 and 28
  19. R

    AS Chemistry Doubts

    That is b/c there are no aldehydes nor ketones present. Look closely there is a carboxylic acid (COOH) group. carboxylic acids do not give orange ppt with DNPH :))
  20. R

    AS Chemistry Doubts

    http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_s10_qp_12.pdf Qs 40) Why is D not the answer. Ethanal would be oxidised to ethanoic acid b/c we are not distilling the ethanal produced so why is B option correct Qs 35) Why is A...
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