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Recent content by zenyatales

  1. zenyatales

    Online MCQ Practice !

    Hey snowbrood, They would be a great addition to the website. But it might take some time before we can add them. Thanks for the link!
  2. zenyatales

    Online MCQ Practice !

    Hello everyone, http://exampractices.com/ This is an ongoing project for a website to practise multiple-choice questions online. The site is focused on MCQ papers for the CIE A-Level exams and currently has MCQ papers of the following subjects available for practice ...
  3. zenyatales

    Chemistry: Post your doubts here!

    ^thank you,for clearing my confusion.
  4. zenyatales

    hi there :)

    hi there :)
  5. zenyatales

    Chemistry: Post your doubts here!

    This is a simple dilution question. First there's some acid - FA1. We take 38 cm^3 of FA1 and dilute it in a 250 cm^3 flask by adding distilled water uptil the 250 mark. And call it FA3. We take some of FA3 and titrate it and figure out that the conc of the acid in the burette = 0.732 mol/dm^3...
  6. zenyatales

    BIO AS :((

    Read Biological Science book for clear concepts in Bio. But remember to consult the syllabus when reading from other sources. However the Wendy Biology book is quite sufficient in itself actually.
  7. zenyatales

    Chemistry P4| A2 only

    ( : thanks!
  8. zenyatales

    Chemistry P4| A2 only

    please post a link if anyone has the O/N 2011 ER ?
  9. zenyatales

    Chemistry P4| A2 only

    http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_s08_qp_4.pdf how do you do question 8 b? thanks for the help!
  10. zenyatales

    Chemistry P4| A2 only

    can anyone explain what probes are and where exactly they are used in electrophoresis?
  11. zenyatales

    Chemo P5 tips

    this picture explains the divided flask quite clearly. but i m still not sure if its as okay to use a thistle funnel and a beaker, as to use a divided flask for gas collection. :/...
  12. zenyatales

    Chemo P5 tips

    for enthalpy change of neutralisation, divide by the no. of moles of that-which-is-not-in-excess ?
  13. zenyatales

    Chemo P5 tips

    http://www.xtremepapers.com/papers/... AS Level/Chemistry (9701)/9701_w10_qp_53.pdf Q. no. 1 c :- How to ensure that none of the oxygen is lost ? Generally, how do you prepare 'divided flasks' ? To prevent the loss of gas produced in the equation ? http://www.xtremepapers.com/papers/... AS...
  14. zenyatales

    Chemo P5 tips

    For 2 mol of NaOH --- 1 mol of H2SO4 has been required (according to the balanced equation given) For 1 mol of NaOH --- we'd need 0.5 mol of H2SO4. Since we have the volume and concentration of NaOH, we can find the no. of moles of NaOH in that solution. n = v * c = (let) 0.050 * 3...
  15. zenyatales

    Writing in pencil !!! Please Help

    i had been one of those asking this question last session (a lot of pencil work).. don't think the grades were affected. but as clearly advised everywhere,remember to switch to pens from now on.
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