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  1. B

    HI

    HI
    • Browny
    • Profile post
  2. B

    Physics: Post your doubts here!

    What was the answer for the diffraction grating double slit question where they asked which had greater separation between fringes and which was sharper?
  3. B

    Physics 12 GT

    What was the answer for the diffraction grating double slit question where they asked which had greater separation between fringes and which was sharper?
  4. B

    Chemistry: Post your doubts here!

    Yes.
  5. B

    Chemistry: Post your doubts here!

    Please help!!!!
  6. B

    Chemistry: Post your doubts here!

    Please help!!!!
  7. B

    Chemistry: Post your doubts here!

    The enthalpy change of solution is the enthalpy change when 1 mole of an ionic substance dissolves in water to give a solution of infinite dilution. This is the definition and in the above case CaO is the ionic substance dissolved in water. Isn't that so?
  8. B

    Chemistry: Post your doubts here!

    The enthalpy change of solution is the enthalpy change when 1 mole of an ionic substance dissolves in water to give a solution of infinite dilution.
  9. B

    Chemistry: Post your doubts here!

    Yes it is B, but isn't reaction 2 a reaction enthalpy of a solution and can you please give me the definition of enthalpy of hydration. The enthalpy change of solution is the enthalpy change when 1 mole of an ionic substance dissolves in water to give a solution of infinite dilution.
  10. B

    Chemistry: Post your doubts here!

    Please help as I don't understand how to get the reaction 2 answer.
  11. B

    Chemistry: Post your doubts here!

    Snowysangel can you check out my questions
  12. B

    Chemistry: Post your doubts here!

    2 is wrong as it is not high as it is formed from a reversible reaction and 3 is wrong as HSO4- is formed from a one way reaction but as the other is formed from a reversible one.
  13. B

    Chemistry: Post your doubts here!

    Can someone please look into these difficult questions?:)
  14. B

    Chemistry: Post your doubts here!

    It is trigonal planar as it Al has only 3 outer electrons as it is in group 3 and those three are covalently bonded to Cl so it has only 3 bond pairs and is trigonal planar.
  15. B

    Chemistry: Post your doubts here!

    Yes
  16. B

    Chemistry: Post your doubts here!

  17. B

    Chemistry: Post your doubts here!

    I checked the syllabus Data booklet.
  18. B

    Chemistry: Post your doubts here!

    N to N bond is 944 not 994.
  19. B

    Chemistry: Post your doubts here!

    http://papers.xtremepapers.com/CIE/... AS Level/Chemistry (9701)/9701_s11_qp_12.pdf Can anybody please explain question 11 ans C, 23 ans B, 32 ans D?
  20. B

    Chemistry: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_s11_qp_12.pdf Can anybody please explain question 11 ans C, 23 ans B, 32 ans D?
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