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Search results

  1. histephenson007

    chem p12...hmm that was a tough one !!!

    I got the same answer :Yahoo!: :ROFL:
  2. histephenson007

    Chemistry MCQ thread...

    both answers are C?
  3. histephenson007

    Chemistry MCQ thread...

    Ok guys... thats it for me today¬ I'm going to sleep A VERY BIG THANK YOU FOR EVERYONE!!! I've learned a lot from this thread! Good luck and Godspeed for everyone taking the test tomorrow¬ Have fun doing it!!!
  4. histephenson007

    Chemistry MCQ thread...

    one thing u need to know about this is that at stratosphere, the energy given by the UV rays isn't enough to break the 'C-F' bond... u can continue with the question urself
  5. histephenson007

    Chemistry MCQ thread...

    is it A?
  6. histephenson007

    Chemistry MCQ thread...

    There was a topic few days ago where someone posted papers of 2000, u can search for it in other topics... it will probably be a few pages after this thread.
  7. histephenson007

    Chemistry MCQ thread...

    @hassam is it C?
  8. histephenson007

    Chemistry MCQ thread...

    I remember reading from a textbook that secondary undergo a mixture of Sn1 and Sn2 mechanism. so... primary ....... Sn2 mechanism secondary ..... mixture of Sn1 & Sn2 mechanisms tertiary ........ Sn1 mechanism
  9. histephenson007

    Chemistry MCQ thread...

    D...tertiary .... the CI almost looks like chlorine
  10. histephenson007

    Chemistry MCQ thread...

    yea right!
  11. histephenson007

    Chemistry MCQ thread...

    for question 9, the answer is D if in SO3 (Charge : -2) the oxidation number is +3.... when it changes into SO4 (still -2) there is an extra -2 charge due to the additional oxygen ion, but the final charge still remains (-2). So the Sulphur ion must've balanced the extra (-2) . So it must have...
  12. histephenson007

    Chemistry MCQ thread...

  13. histephenson007

    Chemistry MCQ thread...

    Someone plz explain this question to me... And, the answer isn't B, ...its A
  14. histephenson007

    Chemistry MCQ thread...

    Sorry, thatz my fault...its a kind of addiction
  15. histephenson007

    Chemistry MCQ thread...

    @sweetpie : Answer for 14 is A...
  16. histephenson007

    Chemistry MCQ thread...

  17. histephenson007

    Chemistry MCQ thread...

  18. histephenson007

    Chemistry MCQ thread...

    Could you plz give me the equation of the nitrate decomposition for this reaction?
  19. histephenson007

    Chemistry MCQ thread...

    That was my answer as well, but the mark scheme says its C... - -
  20. histephenson007

    Chemistry MCQ thread...

    Q. Use of the data booklet is relevant to this question. What volume of oxygen, measured under room conditions, can be obtained from the thermal decomposition of 8.2g of Calcium nitrate (Mr=164)? A. 150 cm^3 B. 300 cm3 C. 600 cm3 D. 1200 cm3
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