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  1. A

    AS BIOLOGY P-33

    you add the acid + neutralise it BEFORE carrying Benedict's test
  2. A

    AS BIOLOGY P-33

    Np :)
  3. A

    AS BIOLOGY P-33

    Yep. Sucrose, however, is non reducing.
  4. A

    AS BIOLOGY P-33

    disaccharides are NOT non-reducing. Except for sucrose.
  5. A

    AS BIOLOGY P-33

    All monosaccharides and disaccharides (atleast the ones in our syllabus) are reducing except for sucrose.
  6. A

    AS BIOLOGY P-33

    Thought I should share this: Candidates should give calculated quantities to the same number of significant figures as the measured quantity that has the smallest number of significant figures. For example, if a candidate collects values of time measured to 1 significant figure and values of...
  7. A

    AS BIOLOGY P-33

    Google them :P Use the syllabus to find out what you should be able to identify and google it..
  8. A

    AS BIOLOGY P-33

    thats not possible. Have a look at this: time= 4,8,12,16 these are all correct to the same dp but not sf. Vice versa for time: 4.0,8.0,12,16
  9. A

    AS BIOLOGY P-33

    keep what the same? S.f or d.p?
  10. A

    AS BIOLOGY P-33

    And.. any tips for the paper??
  11. A

    AS BIOLOGY P-33

    When constructing tables for,say, volume of gas produced with time for an enzyme catalyzed reaction, are we supposed to keep the no of dp same for time, like we do in physics, or sf? I personally think we should keep the dp same since time is the independent variable here but im not sure..
  12. A

    Chemistry: Post your doubts here!

    Is Barium carbonate water soluble or insoluble? :/
  13. A

    Chemister & Physics Paper 3

    Secondly, 3. Do nitrITES not give NO2 on decomposition? 2. Is the error in titre (any volume added by a burette) 0.05cm^3 or 0.1cm^3?
  14. A

    Chemister & Physics Paper 3

    Could anyone PLZ post the marking scheme for chemistry p31 specimen paper 2007? Thanks in advance :)
  15. A

    AS PHY PRACTICAL 33

    Yep :)
  16. A

    AS PHY PRACTICAL 33

    For the first two, yes, except youll write L1-L2 in the denominator for case 2. For the other 2, error is {0.1/L1+ 0.1/L2} multiplied by their product or quotient Hope this helps :)
  17. A

    AS PHY PRACTICAL 33

    For example w08.p31.Q2(a)(ii) we were to use a metre rule to determine d.. theyve allowed errors of 1 or 2mm for single determination of d but not .5mm
  18. A

    AS PHY PRACTICAL 33

    .1/20.0.. Ive gone through like 45 marking schemes.. Never found .05mm as the uncertainty..
  19. A

    AS PHY PRACTICAL 33

    What if we have to measure its diameter?
  20. A

    AS PHY PRACTICAL 33

    Yeap.
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