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  1. Pals_1010

    Chemistry: Post your doubts here!

    Thanks!!! :D
  2. Pals_1010

    Papers Variants?

    Where can I Find Chemistry A Level Paper 2 Nov 2002 (9258/2)? The marking scheme more specifically? The one available on the site seems to be a different variant? Thank you
  3. Pals_1010

    Chemistry: Post your doubts here!

    Another one please? The oxidation number of a vanadium complex can be determined as follows. 0.013 mol of the ion is dissolved in water and made up to 100cm3. 10 cm3 of this solution was made to react with 20.8 cm3 of 0.025 mol/dm3 of KMNo4 solution. All the Vanadium ions were oxidised to the...
  4. Pals_1010

    Chemistry: Post your doubts here!

    Thank you Doctor Nemo
  5. Pals_1010

    Chemistry: Post your doubts here!

    Thank You
  6. Pals_1010

    Chemistry: Post your doubts here!

    Hey, can someone explain this to me please? ''An alcohol can be converted into a chloroalkane by reaction with either PCL3 , PCL5 or SOCL2. Which is the best method? Justify your answer.'' Thank you :)
  7. Pals_1010

    Biology paper 1 - Discussion

    Easy paper. Mostly past papers.
  8. Pals_1010

    Physics paper 1 - Discussion

    @ mimmi Yeah the statement B is correct in the sense that if it is put in boiling water, the molecules will gain energy and collide with an increased frequency and force the walls of the container, thus increasing pressure. But it isn't the correct answer as the question asked about thermal...
  9. Pals_1010

    Physics paper 1 - Discussion

    What was the answer for the question on decaying nucleus X and Y? the one where it is asked when the number of counts of X will be equal to that of Y?
  10. Pals_1010

    Physics paper 1 - Discussion

    Not bad. But there were some tricky questions. Tell ya about them in 24 hours :)
  11. Pals_1010

    Chemistry MCQ (Paper 1) Discussion

    For the electrolysis of aluminium question Statement 2 and 3 are correct. As in electrolysis of aluminium, oxygen is produced at the anode. And since the anode is made of graphite(C), it can also burn in the oxygen produced.
  12. Pals_1010

    Chemistry MCQ (Paper 1) Discussion

    @ creative The molecule seems to be too short. It was a longer one in the paper right?
  13. Pals_1010

    Chemistry MCQ (Paper 1) Discussion

    @ Prince Mind explaining that bit please? :)
  14. Pals_1010

    Chemistry MCQ (Paper 1) Discussion

    @ Humaid, rose and jazza i think Solution X is used to absorb the excess C02 that hasn't been converted to carbon monoxide to prevent the mixing of both gases upon collection.
  15. Pals_1010

    Chemistry MCQ (Paper 1) Discussion

    The number of electrons i think is 17. Option C
  16. Pals_1010

    Chemistry MCQ (Paper 1) Discussion

    @ mimmi very observant ;) i think the reverse of sublimation is also known as condensation. Not sure about that. If am wrong then dang it, one mark lost.
  17. Pals_1010

    Chemistry MCQ (Paper 1) Discussion

    @ alay The answer is the one with decreasing gradient. The answer B i think Looks a bit like this.
  18. Pals_1010

    Chemistry MCQ (Paper 1) Discussion

    So how was it? Very easy ;)
  19. Pals_1010

    Additional Mathematics (Paper 2) Discussion

    @ Dracula Yup i got the same answers :)
  20. Pals_1010

    Additional Math Paper 1, how was it?!

    @ Heshna Yeah dont worry. It doesnt matter
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