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  1. A

    Chemistry: Post your doubts here!

    Can someone explain question 3iv) for me? I looked for the mark scheme but I couldn't understand it. http://studyguide.pk/Past%20Papers/CIE/International%20A%20And%20AS%20Level/9701%20-%20Chemistry/9701_w07_qp_4.pdf
  2. A

    Chemistry: Post your doubts here!

    should Should be C, 2 and 3. 1 is obviously wrong, N is being reduced. The oxidation no. changed from +3 to 0. 2, and 3 are correct. NaClO is a bleach and AgCl (precipitate will form)
  3. A

    Chemistry: Post your doubts here!

    so m/e ratio not only affects the deflection in magnetic field, but also electric field?
  4. A

    Chemistry: Post your doubts here!

    I saw this question in a reference boo. Which species is deflected the least in an electric field? A. 24Mg2+ B. 27Al3+ C. 16O2- D. 31P3-? Why is the answer A, not D? A-D has the same number of electron, but D has the largest number of proton. Proton is deflected the least in an electric field...
  5. A

    Chemistry: Post your doubts here!

    For this question, the correct answer is B. However, I got the answer A... My working steps are: K2O+H2O->2KOH 2KOH+H2SO4->K2SO4+2H2O Found the no of moles for H2SO4, which is 0.03 mol, then used mole ratio and got the no of moles for KOH, which is 0.06 mol I then used mole ratio and found no...
  6. A

    Chemistry: Post your doubts here!

    Got it. Thanks :)
  7. A

    Chemistry: Post your doubts here!

    Hi. Why is 2 a correct statement? Catalyst doesn't affect the yield of product isn't it? Answer is 1 and 2 are correct. http://postimg.org/image/5sln0vven/
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