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  1. T

    AS-CHEMISTRY TOPICAL FINALLY HERE

    Does anyone know where i can find a similar topical for A2 chemistry?
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    SAT 1 Preparation 2013

    Here are the upcoming dates of SAT exams.Be sure to register long beofre the deadlines as the seats are quite limited. Can anyone please post the most relevant sat books.I'll be posting some of mine.
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    SAT 1 Preparation 2013

    Hey Xtremites. Have you been planning to appear in SAT exams this year? Don't know where to start? Well you've come to the right place :D Here you will find all the content,information and resources to help you excel in SAT.Time is running out folks and its only in a few months time that we'll...
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    AS BIOLOGY P-33

    2 to 4 drops should do it.But do confirm it. Its highly unlikely that we get these two reagents instead of the usual biurit solution.
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    AS BIOLOGY P-33

    lol.Np From what i've heard.We'd be given a ph paper :s not sure though. But it will have range of colours for every pH.And the end point (point of neutralisation) would probably green.
  6. T

    AS BIOLOGY P-33

    Its not specified.We'd be given a ph indicator and we'll have to keep adding the Nahco3 in small amounts and test them with the ph indicator till the pH returns to neutral.
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    Yes.

    Yes.
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    AS BIOLOGY P-33

    If you are reffering to these then i must tell you these are not the "planned diagrams" .These are original images of specimens.
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    AS BIOLOGY P-33

    Guys all we need now are the plan diagrams of Dicot stem and root.Someone please post them here.It would be much appreciated. :)
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    AS BIOLOGY P-33

    Actually we have to hydrolise sucrose to reducing sugar using HCL and heating it to over 80 degrees. And then we have to perform benedicts test.But before that we need to neutralise the excess acid we used earlier by using NaHco3 which is an alkali.We'd be given a ph indicator or something(ph...
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    AS BIOLOGY P-33

    Whats the other method ? )O.o
  12. T

    AS BIOLOGY P-33

    S Starch is included in the reagents right? Amylase + starch -----> Maltose
  13. T

    AS BIOLOGY P-33

    To Hydrolyse starch to convert it into reducing sugar so we can perform benedicts test on it.(thats what i know though)
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    Chemistry: Post your doubts here!

    I thin I think step 4 may be "NaOh with heat under reflux" not sure btw.You better check
  15. T

    Chemistry: Post your doubts here!

    A little help guys ? :)
  16. T

    AS PHY PRACTICAL 33

    So in short,not only do we have to use the uncertainty values of any instruments used but also to add other sources of error such as reaction time etc... And the answer would be a total sum of these errors. i hope i am right :|
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    AS PHY PRACTICAL 33

    How so ?
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    AS PHY PRACTICAL 33

    If a question were to appear tommorow asking to calculate the percentage uncertinity in the distance D(the distance travelled by the marbal from the point where it is released to the point it comes to rest) What would be the absolute error in this calculation?
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    AS PHY PRACTICAL 33

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_w12_qp_34.pdf This is the one guys and yea it seems pretty much whats expected.
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    AS PHY PRACTICAL 33

    Can you be a bit specific about the session and variant though.
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