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  1. H

    Chemistry 2006

    o/n or m/j
  2. H

    bond angle

    ER says a lone pair of electrons is DEEMED to have greater repulsion than a bond pair....i think this ansers abt H2S case as well
  3. H

    bond angle

  4. H

    bond angle

    this is ok but PH3 bond angle u just mentioned is wrong according to 1 mcq that came
  5. H

    AS biology!

    hmm....this is a good diagram explaining opsoninsation....but tell me abt psuedopodia
  6. H

    AS biology!

    .Describe how bacteria are taken up by phagocytes...need.esp the wording for that pesuedopdia part...
  7. H

    Help in Chemistry

    find mol fraction.....multiply this by total pressure.....u ll get the partial pressure
  8. H

    bond angle

    but WIKIPEDIA says 92 deg
  9. H

    bond angle

    this is what i got from wikipedia but shouldn't it be close to that of water
  10. H

    bond angle

    wats bond angle in hydrogen sulfide
  11. H

    bond angle

    wats bond angle
  12. H

    IR May/june 2011

    m also waiting
  13. H

    AS biology!

    endodermis is a layer of cells with suberised cell walls thus around the vascular bundle in roots thus blocking out the appoplast pathway so that water must pass through cell membrane b4 passing to xylem so that membrane can select for which minerals to pass through.....
  14. H

    determinng Kc ...practical....

    anyone here who has performed this practical....and can provide me with full practical details....
  15. H

    AS biology!

    39.after volcano no. of animals and plants gonna decrease ryt.....???.....so means dead animals increased i.e moor food for decomposers.....when more ammonium ions formed from decomposition nitrifying bacteria will also increase 40.its simple .....75/1.75 i.e (NP passed to herbivores)/NP HOPE...
  16. H

    AS biology!

    cardiac cycle: av valves will be closed when pressure in ventricle is greater than the pressure in atrium....SL valve will be closed when the pressure in aorta is greater than pressure in ventricle.....at 1 ventricle pressure increases than atrial pressure and hence av valve closes.....and sl...
  17. H

    Chemistry moles..... discuss questions here.......

    http://www.xtremepapers.net/CIE/Interna ... _qp_31.pdf wahab in this question.....can u help me out on the no. of readings that should be taken after zinc powder has been added...the instruction given is a bit ambiguous
  18. H

    Chemistry moles..... discuss questions here.......

    yea wahab in titration expt......mole calculations wat abt the no. of decimal places we carry on to calculate the next value and to what no of sig fig we quote the no. of moles
  19. H

    Chemistry moles..... discuss questions here.......

    yea wahab in titration expt......mole calculations wat abt the no. of decimal places we carry on to calculate the next value and to what no of sig fig we quote the no. of moles
  20. H

    plan diagrams and graticule...

    hmm....hamid there are sum questions in which they are asking to use high power and draw 4 or five cells......so any important tip for that
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