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  1. smart_boy

    Biology; Chemistry; Physics: Post your doubts here!

    Are u feeling tired of helping me out in my questions..?? :eek: I m not evn asking sumthng out of syllabus..!! And its ok if u dont know the answer.. At least keep helping me out in whatever u can.. I guess u r d only SMART guy out here..! And i need ur help cos i m not..!! (dont go by my...
  2. smart_boy

    Biology; Chemistry; Physics: Post your doubts here!

    Pls let me know if u get d ans... Till then pls help me out in electronics... 1. A simple moisture-warning circuit is shown in which the moisture detector consists of two closely spaced copper rods. (a) Warning lamps are often placed in the collector circuit of a transistor. Why is a relay used...
  3. smart_boy

    Biology; Chemistry; Physics: Post your doubts here!

    Thanks..! :) Here's another doubt... Suggest a practical method by which the rate of reaction can be investigated in the following case: Nitrogen monoxide reacting with Oxygen. I know that NO and O2 are colourless gases and the product of the reaction that is NO2, is a brown gas. Just tell me...
  4. smart_boy

    Biology; Chemistry; Physics: Post your doubts here!

    Thanks a lot..!!!! :D And please let me know the last answer when u have found it. In fact, i remember noting this question down from a book in my school library so i guess its not out of syllabus. In the meanwhile, can u pls explain question 5c(ii) of the IG paper I am uploading. I have my...
  5. smart_boy

    Physics, Chemistry and Biology: Post your doubts here!

    Can you please help me out with the following questions? I need the ans urgently as I hav my exam tomo... Thanks.. Q1. Explain the role of Penicillium in the production of penicillin. Q2. Before Penicillium or the medium is put into the fermenter, it is cleaned with hot steam. (a) Suggest why...
  6. smart_boy

    Biology; Chemistry; Physics: Post your doubts here!

    Can you please help me out with the following questions? Q1. Explain the role of Penicillium in the production of penicillin. Q2. Before Penicillium or the medium is put into the fermenter, it is cleaned with hot steam. (a) Suggest why this is necessary. (b) Suggest why the air supply to the...
  7. smart_boy

    Physics, Chemistry and Biology: Post your doubts here!

    Diffusion is the process by which gases or liquids may mix as a result of the random motion of their particles. A common examples is, as you mentioned, the spread of perfumes and cooking aromas. In this case particles will have to leave the perfume bottle and spread out through the air...
  8. smart_boy

    Physics, Chemistry and Biology: Post your doubts here!

    Can you specify what exactly is your doubt in Q. 7 in that paper..?
  9. smart_boy

    Biology; Chemistry; Physics: Post your doubts here!

    I need to ask you one more thing: Why is it that Malaria is common in many parts of the world where the sickle cell allele is present in the population?
  10. smart_boy

    Biology; Chemistry; Physics: Post your doubts here!

    Thanks a lot...!!!! :)
  11. smart_boy

    May/June 2012 Question Papers + Marking Schemes + Examiner Reports + Grade Thresholds

    Do you have June 2012 Checkpoint and Primary Checkpoint Papers..??? Or can you please arrange them for me if u know wer to get them ..? Pls let me know... Thanks..!:)
  12. smart_boy

    Physics, Chemistry and Biology: Post your doubts here!

    I am uploading the recent Jun 2012 IGCSE 0625 Phyiscs paper 32. Can you please solve question 9b in it and then explain it to me too..??? Cos i m getting really confused..!!! Thanks.. :)
  13. smart_boy

    Biology; Chemistry; Physics: Post your doubts here!

    I am uploading the recent Jun 2012 IGCSE 0625 Phyiscs paper 32. Can you please solve question 9b in it and then explain it to me too..??? Cos i m getting really confused..!!! Thanks.. :)
  14. smart_boy

    May/June 2012 Question Papers + Marking Schemes + Examiner Reports + Grade Thresholds

    Dude, THANKS A LOT...!!! :)
  15. smart_boy

    May/June 2012 Question Papers + Marking Schemes + Examiner Reports + Grade Thresholds

    IGCSE 0500 English papers 12, 21, 22, 31, 33 are not there... Please upload them... Thanks a lot..!!! :)
  16. smart_boy

    May/June 2012 Papers!!!

    Pls tell me the paper it is from... Mayb then I ll b able to answer this...
  17. smart_boy

    IGCSE English Paper needed...!!!

    Sorry, I ve no clue where you can find them...
  18. smart_boy

    IGCSE English Paper needed...!!!

    Sorry i dont have any model answers... But I can try to help you out if you have any difficulties in the paper...
  19. smart_boy

    May/June 2012 Papers!!!

    The following papers are missing... 0500 English papers 12, 21, 22, 31, 33 0450 Business Studies papers 11, 12, 13, 22, 23 0455 Economics papers 13, 21, 22, 23, 32 Can you please upload them..??? Thanks...!
  20. smart_boy

    Can i have the markschemes pretty pretty please?

    By any chance do you have the mark schemes of older papers?? If yes, then please upload them... Thnx...!!
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