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  1. kainat husain

    Physics, Chemistry and Biology: Post your doubts here!

    thank you sooooo very much for your effort! thank u i have understood evthg except q16 :/ like how S will ahve +4 it should have +2 :/ please explain its hard :/
  2. kainat husain

    Physics, Chemistry and Biology: Post your doubts here!

    thank u soo much but well how can it cancel 3 and 4 when copper sulfate solution is for 1 and 2 electrodes its too confusing :/
  3. kainat husain

    Physics, Chemistry and Biology: Post your doubts here!

    http://www.xtremepapers.com/papers/CIE/Cambridge%20IGCSE/Chemistry%20(0620)/0620_s07_qp_1.pdf q1 y is it D m not getting :/ q7 how will we knw the answer is C :/ q11 the answer is B but how to do :/ q15 :/ the answer is B q16 how do we knw which is redox :/ answer is C q28 answer is B how do we...
  4. kainat husain

    Physics, Chemistry and Biology: Post your doubts here!

    ok thank you sooo much but i still didnt get 11th one
  5. kainat husain

    Physics, Chemistry and Biology: Post your doubts here!

    http://www.xtremepapers.com/papers/CIE/Cambridge%20IGCSE/Chemistry%20(0620)/0620_s06_qp_1.pdf q- 19 wht the answe is C please explain q-11 how to do this one the answer is C q-9 y the answer is C :/ PLEASE HELP
  6. kainat husain

    Physics, Chemistry and Biology: Post your doubts here!

    for question 27 its even MAGNESIUM OXIDE? s
  7. kainat husain

    Physics, Chemistry and Biology: Post your doubts here!

    woow mashALLAH u r soo good believe me u r gonna a* :p pray for me nd thnxxxxxxxxxxxxx
  8. kainat husain

    Physics, Chemistry and Biology: Post your doubts here!

    hey question for chemistry which side of periodic table alkalis, non metals, metals, and acids lie and if its a metal will it have a positive charge or negative charge! please explain
  9. kainat husain

    Physics, Chemistry and Biology: Post your doubts here!

    in Mg eq u said Mg is metal so no charge but in silver eq u had put charge for silver why
  10. kainat husain

    Physics, Chemistry and Biology: Post your doubts here!

    http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Chemistry (0620)/0620_s04_qp_3.pdf 4b (ii) how the grid will b cux b4 they usediron (III) chloride now they'll use iron (II) chloride? how will i make out the difference? (iii) also
  11. kainat husain

    Physics, Chemistry and Biology: Post your doubts here!

    ahan thnxxxx nice way to explain Mg + 2H+ -> Mg+2 + H2 here u said Mg will nto have nay charge cux it is a metal! wht abt silver it has a chrge ryte?
  12. kainat husain

    Physics, Chemistry and Biology: Post your doubts here!

    i got u like i knw how to do this but when we have to make silver chloride we'll do this? normal eq- AgNO3 + NaCl ------> AgCl + NaNO NOW how to make this an ionic eq?
  13. kainat husain

    Physics, Chemistry and Biology: Post your doubts here!

    no no thnx i got it but y in the product thingy H has no charge Mg + 2H+ > Mg+2 + H2
  14. kainat husain

    Physics, Chemistry and Biology: Post your doubts here!

    plzzz explain how did u do
  15. kainat husain

    Physics, Chemistry and Biology: Post your doubts here!

    i dun have link! xtreem papers dsnt have
  16. kainat husain

    Physics, Chemistry and Biology: Post your doubts here!

    hmm ok actually its for 2000 so forge tit
  17. kainat husain

    Physics, Chemistry and Biology: Post your doubts here!

    O/N 2000 q5
  18. kainat husain

    Physics, Chemistry and Biology: Post your doubts here!

    but this is the normal equation ig uess :/
  19. kainat husain

    Physics, Chemistry and Biology: Post your doubts here!

    how to write the ionic equation for this reaction between magnesium and sulphuric acid
  20. kainat husain

    Physics, Chemistry and Biology: Post your doubts here!

    d- the formula of an acid is either of the type HY or H2Y.How could you find out which one is correct by using Aq.solutions of the acid and of sodium hydroxide. Assume that both solutions have the same concentration, 0.1 mol/dm3 please help!
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