• We need your support!

    We are currently struggling to cover the operational costs of Xtremepapers, as a result we might have to shut this website down. Please donate if we have helped you and help make a difference in other students' lives!
    Click here to Donate Now (View Announcement)

Search results

  1. Y

    GCSE Maths vs IGCSE Maths

    Hi, I was just wondering, since I will be moving to the UK for A-Levels, if GCSE Maths covers the same syllabus as the IGCSE one, because I've done IGCSE Extended Maths and am wondering if I can do A-Level Maths as a continuation to what I already know, and not have any gaps because I didn't do...
  2. Y

    All chemistry Doubts here :)

    Hello all, I've got a doubt that comes from October/November 2010. It is question 17, which states: When pink crystals of cobalt(II) chloride are heated, steam is given off and the colour of the solid changes to blue. CoCl2.6H2O (reversible reaction sign) CoCl2 + 6H2O What happens when water is...
  3. Y

    Chemistry Question.

    I'm not sure about that :S
  4. Y

    Chemistry Question.

    Increase in temperature in the crystals or the surroundings? They ask for the crystals I think, and an increase in the surroundings is correct, but when they ask for the crystals it should be a decrease of temperature in the crystals which cause an increase in the surroundings. Is that correct...
  5. Y

    Chemistry Question.

    Hello all, I've got a doubt that comes from October/November 2010. It is question 17, which states: When pink crystals of cobalt(II) chloride are heated, steam is given off and the colour of the solid changes to blue. CoCl2.6H2O (reversible reaction sign) CoCl2 + 6H2O What happens when water is...
  6. Y

    Chemistry Paper 1 Doubts Here... !

    Hello all, I've got a doubt that comes from October/November 2010. It is question 17, which states: When pink crystals of cobalt(II) chloride are heated, steam is given off and the colour of the solid changes to blue. CoCl2.6H2O (reversible reaction sign) CoCl2 + 6H2O What happens when water is...
  7. Y

    All chemistry Doubts here :)

    Hi all, would it be required for us to know the boiling points for alkanes, alkenes and alcohols up to but/pent?
  8. Y

    All chemistry Doubts here :)

    Yeah I think I understand. Thanks.
  9. Y

    All chemistry Doubts here :)

    Lol okay but just to make sure, how is one supposed to know the oxidation number/valency if it is not provided for transition metals?
  10. Y

    All chemistry Doubts here :)

    This was on the examiners report: This was found to be very hard although the discrimination was satisfactory. About half of all candidates chose B, instead of the key C. The left-hand diagram relates to the release of ammonia from its salts by the action of alkali but the damp red litmus paper...
  11. Y

    All chemistry Doubts here :)

    Ok thanks for that tip, but I have another concern. When you're not given an oxidation state, do transition metals always have a valency of 2? Or is it only Zinc? Usually they would say Zinc (II) or Copper (II) but if they don't how can I assume or determine the valency? Would transition metals...
  12. Y

    All chemistry Doubts here :)

    Hello mate, I've got a doubt here: viewtopic.php?f=24&t=8919&p=95296 I've only got one answer and it was of much help, can you please help me? Thanks! I also posted another doubt regarding the same matter beneath the unhelpful answer, so can you please answer that? Thanks!
  13. Y

    Chemistry help

    So most of the time transition metals have a valency of 2, right? Or is it only Zinc? Usually they would say Zinc (II) but if they don't how can I assume or determine the valency? Would transition metals usually have a valency of 2?
  14. Y

    Chemistry help

    How do I do this question from Winter 2004 Paper 3? Write a symbol equation for the action of heat on zinc hydroxide. That's all they give you. Zinc is a transition metal so ho do I know its valency? The answer I got was wrong. The answer on the mark scheme was Zn(OH)2 ---> ZnO + H2O. How was I...
  15. Y

    physics paper 31 dicussion

    Variant 1 was 20 pages with NO BLANKS. They were all full. It was RAPE. Good luck on it m8, you need it. Most of the exam was not on the syllabus. Doing past papers to prepare for it was useless since nothing came from past papers. I wish you the VERY BEST luck.
  16. Y

    Physics exam 31 came from heeeeeel!!!!! What is wrong CIE

    Re: Physics exam 31 came from heeeeeel!!!!! What is wrong CI HAHA LOL!
  17. Y

    Physics exam 31 came from heeeeeel!!!!! What is wrong CIE

    Re: Physics exam 31 came from heeeeeel!!!!! What is wrong CI Hahaha
  18. Y

    Physics exam 31 came from heeeeeel!!!!! What is wrong CIE

    Re: Physics exam 31 came from heeeeeel!!!!! What is wrong CI Lol the latent heat. I got 3333.333, how about you?
  19. Y

    Pysics Paper 31 (Discussion only)

    Yeah me 2, I got 3333.333 I also asked a mate and he got the same answer, so we might be right.
  20. Y

    Physics exam 31 came from heeeeeel!!!!! What is wrong CIE

    Re: Physics exam 31 came from heeeeeel!!!!! What is wrong CI I don't know what I got. I think I fked that question up. I used the formula v=s/t and substituted to find distance (at least that's what I think I did) I can't remember my answer but I think I got it wrong. I think I got 240s or...
Top