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  1. Gehad Mohamed

    Mathematics: Post your doubts here!

    Hello Please help me solve last part of this question W10 / 33
  2. Gehad Mohamed

    Mathematics: Post your doubts here!

    Hello can someone solve Question 9 in http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Mathematics%20%289709%29/9709_w13_qp_32.pdf fully please !
  3. Gehad Mohamed

    Chemistry: Post your doubts here!

    Hello! Can someone please explain how to solve Q 10 http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_w13_qp_13.pdf
  4. Gehad Mohamed

    Chemistry: Post your doubts here!

    Hi can someone please explain these questions they are from 9701/11/O/N/12
  5. Gehad Mohamed

    Chemistry: Post your doubts here!

    Thanks for your help :)
  6. Gehad Mohamed

    Chemistry: Post your doubts here!

    Thanks alot :)
  7. Gehad Mohamed

    Chemistry: Post your doubts here!

    Now make sense
  8. Gehad Mohamed

    Chemistry: Post your doubts here!

    Mass differs because if aldehyde u get ans A if carboxylic acid ans is c
  9. Gehad Mohamed

    Chemistry: Post your doubts here!

    But they also said distillation ! So plz tell me under which condition will an aldehyde form?
  10. Gehad Mohamed

    Chemistry: Post your doubts here!

    Hi can someone please tell me why the product is a carboxylic acid not aldehyde while they mentioned distillation takes place ! Q 25 http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_w11_qp_13.pdf
  11. Gehad Mohamed

    Chemistry: Post your doubts here!

    Got it thank you :)
  12. Gehad Mohamed

    Chemistry: Post your doubts here!

    Hey! Can someone please solve Q 31 in http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_s08_qp_1.pdf
  13. Gehad Mohamed

    Chemistry: Post your doubts here!

    Thanks soooòoooooooooooo much :D
  14. Gehad Mohamed

    Chemistry: Post your doubts here!

    Hello ! can someone plz explain the following : Q 4 , 5, 14,39 in http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_w06_qp_1.pdf
  15. Gehad Mohamed

    Chemistry: Post your doubts here!

    Thank you so much :)
  16. Gehad Mohamed

    Chemistry: Post your doubts here!

    Ok thanks a lot :)
  17. Gehad Mohamed

    Chemistry: Post your doubts here!

    Its B now am asking why B not D
  18. Gehad Mohamed

    Chemistry: Post your doubts here!

    Use of so2 in food preservation : So2 since is bacteriostatic, is used in food preservation. Its reducing character when moist helps it to be used as a food preservative. They (so2 and sulphides) inhibit the oxidation of food compounds eg:unsaturated fats and also act as acids to restrict the...
  19. Gehad Mohamed

    Chemistry: Post your doubts here!

    Yea it should be B
  20. Gehad Mohamed

    Chemistry: Post your doubts here!

    Hi ! Can someone please explain q 12 why no change in rate and hydrogen evolved when 40cm^3 is used ?! Concentration is more right so at least the rate will increase! !! http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_w02_qp_1.pdf
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