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  1. Mahnoorfatima

    Chemistry: Post your doubts here!

    SOMONE FOR HEAVENS SAKE HELP ME THROUGH THIS CRAP.
  2. Mahnoorfatima

    Chemistry: Post your doubts here!

    http://studyguide.pk/Past%20Papers/CIE/International%20A%20And%20AS%20Level/9701%20-%20Chemistry/9701_s08_qp_2.pdf For question 5 part 3, it says F is heated with H2SO4. What I don't get is how does it change to a carboxylic acid when H2SO4 is used as a dehydrating agent? Or wait.. Only conc...
  3. Mahnoorfatima

    A level Biology: Post your doubts here!

    What do I write for this question: Sucrose is one of the assimilates transported in phlowm sieve tubes of plants from source to sick. Sucrase is found in sinks. Suggest the role played by sucrase in the process of unloading of sucrose at sinks? 2 marks?? And there's this other question : Some...
  4. Mahnoorfatima

    A level Biology: Post your doubts here!

    Do we need to know the structures of different bases like uracil and thymine?
  5. Mahnoorfatima

    A level Biology: Post your doubts here!

    Thanks a bunch! You almost saved my life. :)
  6. Mahnoorfatima

    A level Biology: Post your doubts here!

    http://studyguide.pk/Past%20Papers/CIE/International%20A%20And%20AS%20Level/9700%20-%20Biology/9700_w08_qp_1.pdf Question 4. And in question 12 why cant it be B since the rate of reaction should be 0 at startt when no substrate and Active site are colliding? and in question 23, How can the...
  7. Mahnoorfatima

    A level Biology: Post your doubts here!

    And.. one other thing, if for instance I get 27/40 and the grade threshold is 29 for A and 26 for B. What grade do i get then? A or B?
  8. Mahnoorfatima

    A level Biology: Post your doubts here!

    https://docs.google.com/viewerng/viewer?url=http://maxpapers.com/wp-content/uploads/2012/11/9700_May-June-2011-All-Question-Papers.pdf paper 13 question 18 PLEEEASEEEEE!!!!!!!!!!!
  9. Mahnoorfatima

    A level Biology: Post your doubts here!

    Paper 12 question 35 and 36??https://docs.google.com/viewerng/viewer?url=http://maxpapers.com/wp-content/uploads/2012/11/9700_Oct-Nov-2010-All-Question-Papers.pdf
  10. Mahnoorfatima

    Physics: Post your doubts here!

    http://studyguide.pk/Past%20Papers/CIE/International%20A%20And%20AS%20Level/9702%20-%20Physics/9702_w09_qp_22.pdf Question 6 part b. Why don't we take 1/gradient of the graph when the gradient inverse gives us the resistance!!!!!???
  11. Mahnoorfatima

    Physics: Post your doubts here!

    But why till 5? :confused:. Isn't it like two objects colliding should reverse their velocities? And should the time be extended like in the beginning before the collision till A's time?
  12. Mahnoorfatima

    Physics: Post your doubts here!

    http://freeexampapers.com/A-Level/Physics/CIE/2010-Jun/9702_s10_qp_22.pdf Can someone please see if my question 3 part c is correct? the time intervals are equal to sphere A but I wanted to know if the points Ive taken are correct? anyone? IVE SOLVED IT HERE:https://sketch.io/sketchpad/
  13. Mahnoorfatima

    Physics: Post your doubts here!

    the distance travelled for negligible air resistance should be a straight line No? why is it curve? when there's no resistance which means that there nothing to slow the speed down which would increase the distance? And, why would a smaller mass result in a larger kinetic energy if momentum is...
  14. Mahnoorfatima

    Physics: Post your doubts here!

    http://freeexampapers.com/A-Level/Physics/CIE/2010-Jun/9702_s10_qp_22.pdf Question 2 b ii. shouldnt the distance be o.21? How come it is 90? SOMEONE???? And question 7 bii as well??
  15. Mahnoorfatima

    Chemistry: Post your doubts here!

    If you dont mind can you please explain this question to me?:rolleyes: https://docs.google.com/viewerng/vi...wp-content/uploads/2012/11/9701_s12_qp_23.pdf Question 5 part d? How are we supposed to know the compound. I get the next k2cr2o7 but I don't get what compounds isomers do I draw?
  16. Mahnoorfatima

    Chemistry: Post your doubts here!

    Does it make any difference if we write the structural formula of aldehyde as CH2O or as HCHO?
  17. Mahnoorfatima

    Chemistry: Post your doubts here!

    Sorry for bothering you time and again but I can't find Examiner reports. :/
  18. Mahnoorfatima

    Chemistry: Post your doubts here!

    https://docs.google.com/viewerng/viewer?url=http://maxpapers.com/wp-content/uploads/2012/11/9701_s12_qp_23.pdf Question 5 part d? How are we supposed to know the compound. I get the next k2cr2o7 but I don't get what compounds isomers do I draw!?
  19. Mahnoorfatima

    Chemistry: Post your doubts here!

    Can someone please post ER's of chemisry? I can't find them anywhere and papers are not opening over here! :cry:
  20. Mahnoorfatima

    Chemistry: Post your doubts here!

    Do you have a source for this question? this is ON 12 P23 Qs 4. Could you please solve the other questions that I actually had to ask instead of what I posted before? :rolleyes:
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