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  1. omarjaved619

    What grade will I get in A level Biology (Variant 2)?

    Yeah I think so. Paper 5 had changes. Paper 4 had some tough questions. And in Paper 4, you always lose marks here and there.
  2. omarjaved619

    What grade will I get in A level Biology (Variant 2)?

    Relax bro. I think thats narrowly enough for an A. And I expect the threshold to be lower this time. Just hope for the best:)
  3. omarjaved619

    Chemistry: Post your doubts here!

    Which substance, in 1 mol dm–3 aqueous solution, would have the same hydrogen ion concentration as 1 moldm3 of hydrochloric acid? A ethanoic acid B nitric acid C sodium hydroxide D sulphuric acid Answer is B. But the question is....WHY?
  4. omarjaved619

    Chemistry: Post your doubts here!

    I know that. But I just cant see it happening there in the equation given.
  5. omarjaved619

    Chemistry: Post your doubts here!

    Answer is A. I just dont understand 3
  6. omarjaved619

    Chemistry: Post your doubts here!

    HELP! Answer is C. I get what is going on in A and B. But could anyone help me understand C and D?
  7. omarjaved619

    Yes

    Yes
  8. omarjaved619

    Hahaha Alhamdulillah theek hoon. If by seeing "Kashmir" on my profile you assumed I'm...

    Hahaha Alhamdulillah theek hoon. If by seeing "Kashmir" on my profile you assumed I'm Pakistani, you're wrong. I'm from the Indian Kashmir :D
  9. omarjaved619

    Chemistry: Post your doubts here!

    Oh I'm glad to hear that. Well, as far as I know, students from most colleges and schools (including my school) sit for the May/June exams. Then those who wish to retake sit for the Oct/Nov session.
  10. omarjaved619

    Chemistry: Post your doubts here!

    Daaaang. Thanks again mate (y)
  11. omarjaved619

    Chemistry: Post your doubts here!

    Answer is B. Cant quite figure out the intermediates.
  12. omarjaved619

    Chemistry: Post your doubts here!

    Thanks a lot!
  13. omarjaved619

    Erm no?

    Erm no?
  14. omarjaved619

    Chemistry: Post your doubts here!

    HELP! Answer is C. Does it have something to do with the proportions of the acid and base?:eek:
  15. omarjaved619

    Well, its there to be viewed isnt it?

    Well, its there to be viewed isnt it?
  16. omarjaved619

    Chemistry: Post your doubts here!

    Thanks a lot! The thing that got me confused is that chemguide.com mentions that Tertiary Halogenoalkanes mainly undergo Elimination, whereas Primary undergo substitution.
  17. omarjaved619

    Chemistry: Post your doubts here!

    Answer is C. Why not D?
  18. omarjaved619

    Chemistry: Post your doubts here!

    Heulp! Answer is D (means only 1 is correct). I understood the other two statements. But I just cant seem to figure out why W will neutralize more acid than X?
  19. omarjaved619

    Chemistry: Post your doubts here!

    I think the question has nothing to do with the bond strengths of C-N. CN will attach to the carbon as a whole, like CN-. Reaction 1 is faster bcoz CN- is a stronger nucleophile than the I- ion and thus will attack the C atom more strongly.
  20. omarjaved619

    Chemistry: Post your doubts here!

    Hahaha yes. the "chalky" hints towards carbonate. And its the only one insoluble. Didnt know that CaCl2 is soluble:cautious:
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