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  1. Zahidiiiii

    Physics, Chemistry and Biology: Post your doubts here!

    s
  2. Zahidiiiii

    Physics, Chemistry and Biology: Post your doubts here!

    salty water and air containing oxygen are the best conditions of rust......... since oxygen is not present Fe(2) doesnot oxides to Fe (3)......hence it doest not rust...... now dont tell me that the nail is made up of steel :D
  3. Zahidiiiii

    Biology; Chemistry; Physics: Post your doubts here!

    oh GOd i think no one loves biology or the preparations are quite good,, thats why very less doubts of bio r seen
  4. Zahidiiiii

    Biology; Chemistry; Physics: Post your doubts here!

    use a set square placed over the meter rule and place the marble in between the two set squares. avoid parallex error and take coeresponidng values of diameter on that the setsquare shows on the meter rule and by subtraction u can find the diameter of the marble........ :) my explanation skills...
  5. Zahidiiiii

    Biology; Chemistry; Physics: Post your doubts here!

    Place the sheet of paper on the pin board then place the plane mirror on the sheet. draw a line with pencil to mark the boundries of the plane mirror. use a pin. insert from the pointed end itno the sheet and pin board look with one eye the other closed in the mirror from the other end. where u...
  6. Zahidiiiii

    Biology; Chemistry; Physics: Post your doubts here!

    This question is again about the solubility of salts....keep in mind CaSO4 is Insouble salt so the other satl produces must be soluble :)
  7. Zahidiiiii

    Biology; Chemistry; Physics: Post your doubts here!

    to answer this u must know the solubility of salts. .when AgNO3 reacts with HNO3 Salt form is soluble when AgNO3 reacts with HCl insoluble salt of AgCl is formed from which we can distinguish the presence of chloride ion.. :) ..
  8. Zahidiiiii

    Biology; Chemistry; Physics: Post your doubts here!

    the location of vascular bundle in both monocot and dicot stem is included.how ever the main difference b/t both of them is monocot have one cotelydon while dicot have 2 cotelydons and in their radial symmetry
  9. Zahidiiiii

    Biology; Chemistry; Physics: Post your doubts here!

    yup
  10. Zahidiiiii

    Biology; Chemistry; Physics: Post your doubts here!

    (h)Discuss the environmental and cost implications of underground power transmission compared ot overhead lines. Hope this may help you
  11. Zahidiiiii

    Biology; Chemistry; Physics: Post your doubts here!

    actually here the state of water is changing from liquid to gas....this means energy is absorbed to overcome the attractive forces of attration.so the reaction is endo-thermic
  12. Zahidiiiii

    Biology; Chemistry; Physics: Post your doubts here!

    Actually the pressure exerted on liquid in barometer is due to the atmosphere....no matter how much expansion mercury or another liquid shows it still will tell the atmospheric pressure.......so its not wrong to say that barometer measures the atmospheric pressure...
  13. Zahidiiiii

    its fair to b sincere

    its fair to b sincere
  14. Zahidiiiii

    Maths, Addmaths and Statistics: Post your doubts here!

    the most easiest
  15. Zahidiiiii

    Maths, Addmaths and Statistics: Post your doubts here!

    shokhi bs kr
  16. Zahidiiiii

    Maths, Addmaths and Statistics: Post your doubts here!

    https://www.xtremepapers.com/community/threads/cie-oct-nov-2013-papers-with-marking-schemes.31471/#post-704693
  17. Zahidiiiii

    |||♣Any Past-paper Needed♣|||ASK HERE :)

  18. Zahidiiiii

    CIE Oct/Nov 2013 papers with marking schemes

    A any link for all the subjects?? 4024 needed
  19. Zahidiiiii

    Retake for Pk Studies and Islamiyat... how was it?

    oh...rip,,,,, .:unsure::(:cry:
  20. Zahidiiiii

    Retake for Pk Studies and Islamiyat... how was it?

    soryy the 3rd question like that
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