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  1. Saad Mughal

    Biology; Chemistry; Physics: Post your doubts here!

    Well, I don't write the extinguishes part in 1 mark questions but yeah, it can be added too.
  2. Saad Mughal

    Biology; Chemistry; Physics: Post your doubts here!

    If you still have a problem with reversible reactions then read any of the two chapter notes below: Notes credit: robinhoodmustafa. If you have any further queries then just ask. :)
  3. Saad Mughal

    Biology; Chemistry; Physics: Post your doubts here!

    It's a 2 mark question which means you have to give two statements about the current, so: As R=V/I, so as Resistance increases the value of the Current I decreases. As we proceed further, the resistance becomes constant and hence the current becomes constant. You can also write, Current...
  4. Saad Mughal

    Biology; Chemistry; Physics: Post your doubts here!

    Mark schemes give point to point answers, that does not mean that you can't provide explanations/proper sentences. Whenever asked, just write, Hydrogen gas makes a popping sound when a lighted splinter is brought near it.
  5. Saad Mughal

    Biology; Chemistry; Physics: Post your doubts here!

    :) Chemistry is a funny subject. You never know what to expect. ;)
  6. Saad Mughal

    Biology; Chemistry; Physics: Post your doubts here!

    The diagram is misguiding. If you apply the Fleming's Left Hand Rule you can check the direction of beta particles. The direction of Alpha particles is opposite to that so only the beta particles will enter the detector. You are right, the range is not a contributing factor for this question (in...
  7. Saad Mughal

    Biology; Chemistry; Physics: Post your doubts here!

    Please try to post the link to the paper whenever you ask a question, it makes it easier for us to answer! Alpha particles and beta particles are both deflected by magnetic and electric fields (beta are more strongly deflected since they are lighter). The beta particles are attracted by positive...
  8. Saad Mughal

    Maths, Addmaths and Statistics: Post your doubts here!

    Yeah, it happens, you just want to get done with the question without thinking too much. Thanks for the advice. I guess relative velocity needs the largest proportion of time in the paper.
  9. Saad Mughal

    Maths, Addmaths and Statistics: Post your doubts here!

    Got it. Thanks. :)
  10. Saad Mughal

    Biology; Chemistry; Physics: Post your doubts here!

    B1 independent mark C1 compensation mark; given automatically if the answer is correct, i.e. the working need not be seen if the answer is correct; also given if the answer is wrong but the point is seen in the working M1 method mark: if not given subsequent A marks fall (up to next B, M or...
  11. Saad Mughal

    Biology; Chemistry; Physics: Post your doubts here!

    Sorry for the terribly late reply. Chemistry I tell you. :p If you want an explanation: Evaporation is the process by which a liquid turns into vapor, it only occurs on the surface of the liquid. When a body is at high temperature, it has a large number of energetic molecules that move quickly...
  12. Saad Mughal

    Biology; Chemistry; Physics: Post your doubts here!

    Look, as far as I know, Electronics maybe hard but its questions are always very easy so why not prepare them? What's the harm? Because, if, an even harder question comes in the choice along with this so you better be prepared, now you can't assume that there will be just one hard question now...
  13. Saad Mughal

    No problem. :)

    No problem. :)
  14. Saad Mughal

    For studying? Just think, 2 weeks, good papers means good life up ahead! :) De-activate...

    For studying? Just think, 2 weeks, good papers means good life up ahead! :) De-activate facebook, limit use of tv, just get attached to your past papers and revision cards, think that how happy you and your family will be when you get straight A*'s INSHALLAH! :)
  15. Saad Mughal

    Biology; Chemistry; Physics: Post your doubts here!

    :)
  16. Saad Mughal

    Maths, Addmaths and Statistics: Post your doubts here!

    How did you calculate the time?
  17. Saad Mughal

    Maths, Addmaths and Statistics: Post your doubts here!

    Ok so the y-component is (24-12)=12 so distance = 12*4 = 48km. Yeah you guys are right. I was bound to be wrong in this question, I hate this chapter :(
  18. Saad Mughal

    Biology; Chemistry; Physics: Post your doubts here!

    As water is the liquid state of H2O, similarly molten form is the liquid state of ionic compounds! They become molten when melted (because of their very high melting points).
  19. Saad Mughal

    Maths, Addmaths and Statistics: Post your doubts here!

    Sorry. Don't know Crammer's law.
  20. Saad Mughal

    Maths, Addmaths and Statistics: Post your doubts here!

    You asked the same question last week. :confused: y^2/2 - y/6 = 1/12 3y^2 - y = 1/2 (by lcm) 6y^2 - 2y - 1 = 0 Using quadratic eq.,
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