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  1. A

    Concentration

    Alright. The maximum temperature will be produced when all the acid and base react, which means for a complete reaction, 20cm cube of NaOH reacts with 30cm cube of HCl. Moles of HCl = 2 x 30/1000 = 0.06 Molar ratio of HCl and NaOH s 1:1, so 0.06 moles of HCl react with 0.06 moles of NaOH...
  2. A

    Urgent help!! Maths sequence!

    Well these type of pattern related questions have no set formula to solve. You have to observe them. If you practice enough, they will become easy, don't worry :) b) These will be simple patters, e.g n + x, xn, xn + y, n square or cube. So it could be N + 3, 3N, 2N + 2. You can easily get the...
  3. A

    Concentration

    Question 4 is not about concentration. The answer to question 4 would be B, as you are trying to obtain a solvent from a solution.
  4. A

    SOMEONE help DONNO THe aNSWER TO THIS PHYsics QUeStION

    Nuclear energy is released by nucleur fusion in the core of the sun. It changes into solar energy which reaches the earth. This solar energy heats up the air. The hot air rises, so the solar energy of sun is changed into kinetic energy of air as colder air moves in to fill in the space created...
  5. A

    discussssss the ATP PHYSICSSSSSSS

    The question asked, what is the maximum reading on a STANDARD laboratory thermometer. Now if you would look at a standard laboratory thermometer, the maximum reading is 110 Degrees Celsius. This is because these thermometers are quite often used to measure boiling points of water. The boiling...
  6. A

    phys 03 ms

    Here you go: http://www.xtremepapers.net/CIE/Cambrid ... s03_er.pdf Marking schemes aren't present for older papers, but these examiner reports do just fine.
  7. A

    Biology ATP; DiscussiOn

    The graph was a line graph, right?
  8. A

    Physics need help

    For 9: The ball will first have potential energy. It will begin to fall, the potential energy changing to kinetic energy(because it is moving) and heat energy(loss due to friction) till it goes to the first stopping point. Speed will be zero, kinetic energy will be converted into potential...
  9. A

    Value of 'x' in acid formula?

    x=2. Acid could've been H2SO4 or H2CO3.
  10. A

    Chemistry AtP Discussion

    How was the paper guys? Found it pretty easy. Well, it's basically a repeat every year. Post any questions which you are unsure about and I will try to answer them. What was the temperature at which the solubilities of both salts were same?
  11. A

    Chemistry little help quick guys!!

    Which year is this from?
  12. A

    Chemistry ATP query

    Suppose a flask contains an acid, and an alkali is being added using a burette, with methyl orange indicator. Methyl orange is red in acidic solution, and yellow in alkali solution. When added to flask, it will be red in colour. As alkali is added, a point will come when all the acid will...
  13. A

    discussssss the ATP PHYSICSSSSSSS

    Yes it wont oscillate and it wont swing properly, it will continue to rotate.
  14. A

    discussssss the ATP PHYSICSSSSSSS

    May/June 07 gives 2,4 and 5 as correct answers. A larger number of readings helps a better graph to be plotted. Did you see the graph? It was difficult to join the last two readings because there was such a large gap. Taking more readings will make shape of graph more accurate. 95cm=5cm which...
  15. A

    discussssss the ATP PHYSICSSSSSSS

    Number 5 wasn't pouring the liquid faster through the funnel, it was transferring the oil from the heating place into funnel/beaker faster. The temperature WONT be accurate if a long time is taken in transferring it. 30 second apart readings were used for the experiement. Things which could...
  16. A

    Inzamam-ul-haq sits cie exam

    Buhaha! Well done, Zohaib! I love how he pluralizes everything: "ya boys were playings good"
  17. A

    discussssss the ATP PHYSICSSSSSSS

    2 was using 2 students right? I think the last 2 boxes were right, namely taking a wide range of readings, and transferring the oil quickly to the beaker. Why was number 2 wrong? Because: 2 people should/are used for experiments when 2 quantities have to be measured, or 2 tasks have to be done...
  18. A

    O Level Video Lectures

    Sounds great! These should be very helpful. I would like to see videos on Chemistry, Physics and Computer especially. Thanks!
  19. A

    marks deduction

    Meaning 26/30 will be A* worthy for this paper?(According to your guess) 27/30 is 90%. But the paper was quite difficult for the majority, more difficult than any previous paper. Pretty much everyone's opinion is this. So if the performance is not as good as previous years, A* will be below 27...
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