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  1. The_Boss

    Chemistry paper 52 ... Some doubts..

    When they say smooth its usually a curve.And as for the bends its f9 as long as you dont use a scale to draw lines that are suppose to be curvy(as long as they dont ask you to use two straight line). And how was ur paper?
  2. The_Boss

    Physics, Chemistry and Biology: Post your doubts here!

    It was titration wasnt it?
  3. The_Boss

    Physics, Chemistry and Biology: Post your doubts here!

    Lol mate wrong forum ! But yes I am giving variant 2 Paper 1
  4. The_Boss

    Physics, Chemistry and Biology: Post your doubts here!

    Nahh it was easy
  5. The_Boss

    Physics, Chemistry and Biology: Post your doubts here!

    So how was paper 62 guys?
  6. The_Boss

    Physics, Chemistry and Biology: Post your doubts here!

    Mate u high its correct. See from second equation u get that T equalls 16.8 (t/0.5) So put this on one and u get S easily. s+(16.8*0.5)=16.8 s+8.4=16.8 s=16.8-8.4 s=8.4 Taadaa S=8.4cm3 and T= 16.8cm3
  7. The_Boss

    Physics, Chemistry and Biology: Post your doubts here!

    Titration either requires u to know the equation with formula and use moles or do simple arithmetic calculation Since we dont know the reactants we use arithmetic approach. As the question says that volume of HCl used was to react with half of T and full of S in experiment 1 So now make an...
  8. The_Boss

    Physics, Chemistry and Biology: Post your doubts here!

    Ethanol is an alcohol so its functional group is OH which dissociates into ions(partially) when an alcohol is added to water pH raises slightly from 7 causing an alkaline solution!
  9. The_Boss

    Physics, Chemistry and Biology: Post your doubts here!

    Wrong forum mate!
  10. The_Boss

    Physics, Chemistry and Biology: Post your doubts here!

    Ethanol is slightly alkaline pH around 8-8.5
  11. The_Boss

    Physics, Chemistry and Biology: Post your doubts here!

    No ethanol reacts with magnesium as magnesium is more reactive than the Hydrogen so displaces it. Ethanol + Magnesium ---> Magnesium Ethoxide + Hydrogen (Not sure of spelling though) A better test would be B.P Ethanol more volatile than water Chemical test would be test pH using "pH meter" and...
  12. The_Boss

    Physics, Chemistry and Biology: Post your doubts here!

    Screenshot the first part of question.
  13. The_Boss

    Physics, Chemistry and Biology: Post your doubts here!

    Show us some facts about the method used in the question? (Screenshot the question only) Stop writing in CAPS ITS ANNOYING!!
  14. The_Boss

    Physics, Chemistry and Biology: Post your doubts here!

    -_____- U serious? They both relatively mean the same thing. Anhydrous is the end product u get but Dehydrate is the process. And y is everything CAPS?
  15. The_Boss

    Physics, Chemistry and Biology: Post your doubts here!

    Bii- Carbonate have enough Activation Energy so not required. Cii- When crystallizing at later stage the acid will concentrate in the crystals of salt to produce an impure composition. Dii- Turns Anhydrous and gives off steam.
  16. The_Boss

    How was Biology p6

    I got 0.275 mm. If u got 0."0"45 then its wrong but if u got 0.45 then its correct.
  17. The_Boss

    IGCSE Biology May June 2015 Paper 62 Doubts

    Well the magnification asked for the real size for the cell. I got 0.275mm.
  18. The_Boss

    IGCSE Biology May June 2015 Paper 62 Doubts

    1) A boiled leaf with same dimension as the set of leaves being tested. Can be achieved by heating a leaf in a water bath. Thebcontrolled variable was the specie of plants and source of error was the conc of H2O2 solution. 2) 55 anything from 40 to 60 is acceptable here as some previous year...
  19. The_Boss

    How was Biology p6

    So anyone did P-62?
  20. The_Boss

    Also want QP for P22?

    Also want QP for P22?
    • The_Boss
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