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  1. H

    A level Biology: Post your doubts here!

    Hey guys. For paper 3, usually the last question of the paper in which they ask u to give observable differences between the two specimens. Let's say the question did not state how many differences required but the marks allocated for that question is 4. If we gave 5 differences when the marks...
  2. H

    Chem p22

    My friend did the same mistake too. I wonder how many marks will be deducted?
  3. H

    AS Chemistry P2 Prep.

    Owh.. Then drawing diagrams like dot and cross diagram and optical isomers etc use pen right?
  4. H

    AS Chemistry P2 Prep.

    Hey... Anyone can tell me when only do we need to use pencil in doing chem paper 2? Drawing graphs etc or?
  5. H

    Chemistry: Post your doubts here!

    for Paper 2 if the question asks for the reagent of oxidation, i wrote Potassium Manganate (VII) solution while the answer scheme gave Manganate (VII) ions. Are they both accepted? What should i write?
  6. H

    paper 12 chemistry ...

    Mind explaining?
  7. H

    paper 12 chemistry ...

    This is right :)
  8. H

    paper 12 chemistry ...

    exactly. nitrogen is the ans.
  9. H

    paper 12 chemistry ...

    yeap it's in the past year's
  10. H

    paper 12 chemistry ...

    yeap u r :D
  11. H

    paper 12 chemistry ...

    this is right :)
  12. H

    paper 12 chemistry ...

    nope this is only 2 steps. nucleophilic substituition then oxidation during heating
  13. H

    paper 12 chemistry ...

    isnt this methane free radical?
  14. H

    paper 12 chemistry ...

    yeah confirmed it d....
  15. H

    paper 12 chemistry ...

    mass of products...
  16. H

    paper 12 chemistry ...

    A.. nucleophilic substitutition with NaOH then oxidation by Cr2o7/h+ since number of carbon didnt change
  17. H

    paper 12 chemistry ...

    i did D for this..... :x
  18. H

    paper 12 chemistry ...

    it was a tertiary alcohol :)
  19. H

    paper 12 chemistry ...

    It wasnt 50% 50%. it was 60 something and 30 something i think. it was a sodium salt plus alcohol.
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