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  1. A

    Physics, Chemistry and Biology: Post your doubts here!

    Thats weird!! Its the 1st time i know that vessels are organs!!
  2. A

    POST YOUR BIO AND CHEM PAPER 1 DOUBT HERE !!!!

    Well i dnt think they are..how about ask other people to c if they r organs or not??
  3. A

    Physics, Chemistry and Biology: Post your doubts here!

    Ya the cirulatory system is an organ system..thats what ive been trying to say :D
  4. A

    Physics, Chemistry and Biology: Post your doubts here!

    No they are not organs..they are tissues but in this diagram they are connecting different organs who are part of the same organ system.
  5. A

    POST YOUR BIO AND CHEM PAPER 1 DOUBT HERE !!!!

    I dont think they are organs :P Compare them with kidneys and liver...they dont seem like organs to me :D
  6. A

    Environmental Management folks!!!

    Hey could u explain me question no 1 in paper 21 winter 2011??Plz i dont understand this question.
  7. A

    Physics, Chemistry and Biology: Post your doubts here!

    Yes it is :)
  8. A

    Physics, Chemistry and Biology: Post your doubts here!

    It is an organ system becoz the organs shown like the stomach and the kidneys are all part of the same organ system.
  9. A

    Physics, Chemistry and Biology: Post your doubts here!

    Ok heres another way to explain it. The question said a solution contains barium iodide. To obtain a solution that contains Ba2+(aq) we have to add any nitrate because u know that all nitrates are soluble so the answer is either A or B. Then when we add the nitrate(lead nitrate) the lead...
  10. A

    Physics, Chemistry and Biology: Post your doubts here!

    It is a tricky question i admit. I think u know that Barium Nitrate is soluble so Barium will dissolve in the nitrate solution leaving iodine to react lead forming lead iodide which is yellow to precipitate downwards so the ans is b..If u dnt understand feel free to ask again.
  11. A

    Physics, Chemistry and Biology: Post your doubts here!

    They both are tissues becoz they r both made of cells with similar functions. For eg a neurone is made of up similar functioning nerve cells.
  12. A

    POST YOUR BIO AND CHEM PAPER 1 DOUBT HERE !!!!

    They definitely are tissues.
  13. A

    Physics, Chemistry and Biology: Post your doubts here!

    Carbon is in group 4 so its valency is 4.Chlorine is in group 7 so its valency is 1. Now cross the 2 valencies and u get CCl4 :)
  14. A

    Physics, Chemistry and Biology: Post your doubts here!

    I dont think so
  15. A

    Physics, Chemistry and Biology: Post your doubts here!

    Ok the answer for qno 18 is A, no 21 is B, no 37 is A.
  16. A

    POST YOUR BIO AND CHEM PAPER 1 DOUBT HERE !!!!

    I opened the ms from xtremepapers itself!! Check it out http://www.xtremepapers.com/papers/CIE/Cambridge%20IGCSE/Chemistry%20(0620)/0620_s06_ms_1.pdf
  17. A

    POST YOUR BIO AND CHEM PAPER 1 DOUBT HERE !!!!

    I checked the ms it says the ans is A..Chech that u have opened the right ms :)
  18. A

    POST YOUR BIO AND CHEM PAPER 1 DOUBT HERE !!!!

    Then there must be a mistake..lemme check in my ms
  19. A

    POST YOUR BIO AND CHEM PAPER 1 DOUBT HERE !!!!

    Ya its definitely A not C..As for tips..study the syllabus and then solve as many pastpapers as u can specially the old ones..thats the greatest tip i can give u :)
  20. A

    POST YOUR BIO AND CHEM PAPER 1 DOUBT HERE !!!!

    May the same go to you thx alot :D
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