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Recent content by DPratik

  1. D

    hey i got amazed seeing your results...its just outstanding....hey can you give me some advice...

    hey i got amazed seeing your results...its just outstanding....hey can you give me some advice or tips to do well in CIE..i am just giving 5 subjects...so please give me some tips on chem,physics and maths to secure good grades !!!
  2. D

    Chemistry: Post your doubts here!

    the answer can be found by different ways,there is even a formula to solve this,but I prefer it solving by my calculating... no of moles of ethanol=2.3/46 =0.05 moles of ethanol now as the question has stated that the yield of the product was 70% which means...
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    Chemistry: Post your doubts here!

    in step 1...the compounds is exactly the same as it was before but there is difference in the arrangement of atoms..so obviously the answer is isomerisation because i guess there are other no type of reaction which only arranges the atom and nothing else !!!
  4. D

    Chemistry: Post your doubts here!

    we have to study this topic in Group 7...there is nothing to know much about A2 for this question...just identify which is the ligand and which is the complex ion ??
  5. D

    Chemistry: Post your doubts here!

    for question 1) moles of carbon:29.7/12 = 2.47 moles of hydrogen:6.19/1=6.19 so carbon and hydrogen are in the ratio: 2.47:6.19 (dividing both by the lowest number) or the ratio of carbon and hydrogen is 2.47/2.47: 6.19/2.47 and that is equal to 1: 2.5 ( it is...
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    Chemistry: Post your doubts here!

    for question 32) as Carbon is more stable in +4 oxidation state as compared to +2 oxidation state.Now being stable in terms of enthalpy can be define as being exothermic,which means the enthalpy change is negative As the question has said that carbon monoxide readily forms carbon dioxide which...
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    oh..my future just hangs on my a-level result...if i get good grades then I will study chemistry...

    oh..my future just hangs on my a-level result...if i get good grades then I will study chemistry but if i don't get good grades then i will try study engineering and what about you ?/
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  8. D

    Chemistry: Post your doubts here!

    hey can anyone help with question no 33) of may/june 2003 !!!
  9. D

    i'm doing chem,physics,gp,computing and maths p1,p2,s1 and m1

    i'm doing chem,physics,gp,computing and maths p1,p2,s1 and m1
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  10. D

    ...i had the same case....i had nearly left my stat exam blank...anyway how is your preparation...

    ...i had the same case....i had nearly left my stat exam blank...anyway how is your preparation going on ? and what subjects are you giving this may/june ??
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  11. D

    Chemistry: Post your doubts here!

    in question number 6) as the question has mentioned as insulator which means the answer is either polyethene or silicon oxide....but the question has also said that the compound melts over a wide range of temperature which means the answer is obviously polyethene because silicon oxide has a high...
  12. D

    so what is the solution because we got really less time left !!

    so what is the solution because we got really less time left !!
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  13. D

    Chemistry: Post your doubts here!

    for question 2 ) for question 5) the answer is 120 because you have two most electronegative element of the periodic table,which means when the electron are attracted by oxygen,then the lone pair of nitrogen takes the place of bonded electron(it is same like the resonance principle of...
  14. D

    Physics direct sensing notes needed! H.E.L.P!

    - hey then how about transition metals and worksheet on enthalpy changes(As) ??
  15. D

    Chemistry: Post your doubts here!

    o thank you !!! now i heard of ionic liquid !!
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