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  1. Aymen Ezazi

    Chemistry: Post your doubts here!

    yes they did not , but one of my friend who has already done A'levels and is in a uni now, expalined this.. that when and intermediate is formed the the energy decreases , one question like this came even in paper 2 with the same graph and had the intermediate mentioned..
  2. Aymen Ezazi

    Chemistry: Post your doubts here!

    intermediate forms only in teritary halogenoalkaens and in electrophilic addition.. intermediate forms in SN1 mechanism ONLY , not SN2
  3. Aymen Ezazi

    Chemistry: Post your doubts here!

    Q40 is easy, just look for an intermidiate, because there is always a curve downwards like this in the middle when ever they ask anything related to an intermediate, and in only 1 there is an intermediate formed when the Br is broken, THN the intrmediate forms thn OH group attaches.. in 2 and 3...
  4. Aymen Ezazi

    Chemistry: Post your doubts here!

    the third cross in this have the least ionisation energy that means it is from group one , and that would be sodium , and before sodium comes a noble gas , neon which will have the highest ionisation energy, and before neon is fluorine so that will be it :)
  5. Aymen Ezazi

    Chemistry: Post your doubts here!

    yes it lost two electrons , but note that the second one is from an orbital closer to the nucleus , so has high 2nd ionisation energy, in C the 2nd ionisation energy will be little higher thn A bcoz its in p sub shell but 2 different orbitals, and A will have least 2nd ionisation energy bcoz its...
  6. Aymen Ezazi

    Chemistry: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_s07_qp_1.pdf can anyone plz help me with ques 2 , 6 , 9 , 26 , 28 , 32 , 40
  7. Aymen Ezazi

    Chemistry: Post your doubts here!

    Q3-- they did not ask to see the data booklet but it will be a lot easier if u just go through it , A is not correct bcoz it is Mg and its second ionisation energy is not high thn sodium and aluminium, C is not correct because its is silicon and its 2nd ionisation energy is not higher thn Al and...
  8. Aymen Ezazi

    Chemistry: Post your doubts here!

    and Walaikum as salam..
  9. Aymen Ezazi

    Chemistry: Post your doubts here!

    can u plz attach the link with it :)
  10. Aymen Ezazi

    Chemistry: Post your doubts here!

    because brass is a mixture of two metals so will have only metallic bonding between them, whereas graphite has covalent and van der waals forces between its atoms , and ice has covalent and hydrogen bonding..
  11. Aymen Ezazi

    Chemistry: Post your doubts here!

    i have so many doubts in all the papers so i m lining them up, plzz help me.. exam's after a few days.. http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_s04_qp_1.pdf ques 1, 3 , 9 , 20 , 28 http://papers.xtremepapers.com/CIE/Cambridge...
  12. Aymen Ezazi

    ur welcome :)

    ur welcome :)
  13. Aymen Ezazi

    ji ni.. aymen baji hi bolo jaisay pehlay boltay thay..

    ji ni.. aymen baji hi bolo jaisay pehlay boltay thay..
  14. Aymen Ezazi

    Cant access papers?

    papers page not opening..
  15. Aymen Ezazi

    papers going gud Alhamdulilah and zain bhi prh hi rha hai

    papers going gud Alhamdulilah and zain bhi prh hi rha hai
  16. Aymen Ezazi

    acha tou baji say aymen ho gya????? hmmmm??

    acha tou baji say aymen ho gya????? hmmmm??
  17. Aymen Ezazi

    What do you think will come up in Chemistry 32? :)

    i dont think titrations are coming.. only entalpy changes and cation anion tests
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