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  1. A

    Chemistry: Post your doubts here!

    i think you used V=n*24 for finding volume instead of V=n/C
  2. A

    Chemistry: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_w10_qp_11.pdf Q7
  3. A

    Chemistry: Post your doubts here!

    check this https://www.xtremepapers.com/community/threads/chemistry-post-your-doubts-here.9859/page-511#post-826539
  4. A

    Chemistry: Post your doubts here!

    by Suchal Riaz Q31 you must be having problem why (3) is wrong. actually the T in the equation is in kelvin. so the temperature does not double but actually increase by 25. so it is wrong. to double it the temperature must double means 2X(273+25=596K=323°C All others are correct. 2) statement...
  5. A

    Chemistry: Post your doubts here!

    check this link http://www.chemguide.co.uk/basicorg/isomerism/optical.html
  6. A

    Chemistry: Post your doubts here!

    solubility of hydroxides increases down the group solubility of carbonates and sulfates decreases down the group check this link http://www.chemguide.co.uk/inorganic/group2/solubility.html
  7. A

    Chemistry: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_s11_qp_12.pdf Q10(C),29(D),33(D)
  8. A

    Chemistry: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_s11_qp_11.pdf Q16(D),26(D)
  9. A

    Chemistry: Post your doubts here!

    Both.
  10. A

    Chemistry: Post your doubts here!

    Sir can you please elaborate Q20
  11. A

    Chemistry: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_w11_qp_11.pdf Q4(C),17(C),20(C),27(D),35(B),36(A)
  12. A

    Chemistry: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_w11_qp_11.pdf Q4(C),17(C),20(C),27(D),35(B),36(A)
  13. A

    Chemistry: Post your doubts here!

    Thanks alot
  14. A

    Chemistry: Post your doubts here!

    Don't say like this. You should have checked the question if it is repeating or not before asking. now he spend his time to solve your doubt so you should appreciate him instead of saying like this
  15. A

    Chemistry: Post your doubts here!

    just try copying and pasting the question or link with question number at the end on google maybe you get some questions answered previously by the members. Because the questions you are asking might be repeating.
  16. A

    Chemistry: Post your doubts here!

    Suchal Riaz http://papers.xtremepapers.com/CIE/... AS Level/Chemistry (9701)/9701_w11_qp_12.pdf 9(D),36(D),39(C)
  17. A

    Chemistry: Post your doubts here!

    2 NaHCO3 + H2SO4 → 2 CO2(g) + 2H2O(l) + Na2SO4 n(H2SO4)=(7.15*10^-3)*0.1=0.715*10^-3 mol using mole ratio n(NaHCO3)=2*n(H2SO4)=2*(0.715*10^-3)=1.43*10^-3 mol since you have got n(NaHCO3) you can find mass of NaHCO3 reacted = n*(mr of NaHCO3)=0.1202g %by mass of NaHCO3...
  18. A

    Chemistry: Post your doubts here!

    1) is correct because nitrogen is reducing and chlorine is oxidizing so nitrogen undergoes a redox reaction 2) NaClO is the bleach 3) AgNO3 (aqueous) + NaCl (aqueous) -----> AgCl (white precipitate) + NaNO3 (aqueous) therefore answer = A
  19. A

    Chemistry: Post your doubts here!

    Gas X =N02 Gas Y =O2 2Mg(NO3)2 = 2MgO + 4N02 +O2 mass of gas X (NO2) produced =4*(mr of NO2)=4(46)=184 mass of gas Y (O2) produced =mr of O2=32 X/Y=184/32=5.75=1/0.174=5.75 answer = A
  20. A

    Chemistry: Post your doubts here!

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