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  1. J

    POST YOUR BIO AND CHEM PAPER 1 DOUBT HERE !!!!

    fatima do ratio and proportion 21(%of O2) : 120 100(%of all gases including o2) : x Cross multiplication
  2. J

    POST YOUR BIO AND CHEM PAPER 1 DOUBT HERE !!!!

    ok listn the arrangement of the apparatus allows OH- ions to move to the cathode but prevents sodium to leave the cathode so at the cathode rxn occurs Na+ + OH- --> NaoH colour turns blue due to ^pH
  3. J

    BIOOOOOOOOOOOOOLLLOOOOGY PAPER 1 VARIENT 2

    did v2 loosing 2 marks max hopefulyy
  4. J

    ANSWERING ALL BIO/CHEM PAPER 1 DOUBTS :)

    That means half r spotted and half r not spotted(normal)... So the genotype of the offspring is Bb and bb so how can we achieve that... look for the 2 parent genotypes that give the offsprings Bb and bb .. so If u cross Bb and bb u will get 2 Bb and 2 bb therefore answer is C... i know this is...
  5. J

    Physics, Chemistry and Biology: Post your doubts here!

    Mashallah.. ur good Rahma
  6. J

    ANSWERING ALL BIO/CHEM PAPER 1 DOUBTS :)

    DOES ANYONE have the OMR SHEET?? the MCQ question paper where u fill up the circles? if u do upload them here.. thanks alottttt
  7. J

    Physics, Chemistry and Biology: Post your doubts here!

    Some pestecides affect plants
  8. J

    Expected IGCSE grades

    Nice u powned me hahah.. hopefully A*s
  9. J

    Expected IGCSE grades

    Dude im saying what im expecting MY marks to be...
  10. J

    Physics, Chemistry and Biology: Post your doubts here!

    ur welcome
  11. J

    POST YOUR BIO AND CHEM PAPER 1 DOUBT HERE !!!!

    @Abumot 1)look theres an airlock.. this allows CO2 to leave but doesnt allow O2 to enter 2)Also they say that the guy who exercises takes a rest then works out 3)Look when u add a limiting factor the graph should go up or go down.. when theres no limiting fac the graph has its 4 stages lag, log...
  12. J

    i wanna watch a movie ! r8 now ?

  13. J

    i wanna watch a movie ! r8 now ?

    chernobyl diaries
  14. J

    important chapters and stuff for bio p1 !!

    they focus on the last chapters since they r the least that we conc on and the first chapters mid ones not that much
  15. J

    Expected IGCSE grades

    Chem = 175 Bio prolly 170 Math 180-185 Physics 165-170 English prolly 180'ish ICT = 180's Arabic = im getting a B or a C.. theres no curve for arabic
  16. J

    POST YOUR BIO AND CHEM PAPER 1 DOUBT HERE !!!!

    mj '99 Q-18 Ans = B.. coz the arrangement of the apparatus allowed co2 to leave but doesnt allow o2 to enter.. Q-22 Ans = C because the auxins will first be concentrated at the tip (A) and then diffuse down but away from the light so B and D are wrong because they are opposite to the direction...
  17. J

    Maths IGCSE May/June 2012 Papers 22 and 42 marked

    181 is an A* aint it?
  18. J

    POST YOUR BIO AND CHEM PAPER 1 DOUBT HERE !!!!

    q16 o.n 98 ans = B coz more 02 makes blood brighter .. less o2 coz of c02 makes blood dull..
  19. J

    Want to know BIO V-2 THRESHOLDS: That's your destination ;)

    oh ok it wasnt that hard i think a 46 or 47 is most appropriate..
  20. J

    Physics, Chemistry and Biology: Post your doubts here!

    for MJ 2004 Q29 ans is C 30cm3 is used up which is oxygen which makes up 21% of the air The rest is nitrogen c02 watervapour and noble gases.. these all are 79% So if 21% = 30cm3 then how much is 100% ( all the volume of the oxgen and other gases) Do cross multiplication u will get...
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