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OCR Chemistry F322~ 4th June 2013~ AS Chemistry watch

  • View Poll Results: How did you find the exam
    Hard A= 72
    42
    15.22%
    It was okay A= 76
    99
    35.87%
    Easy A= 79
    75
    27.17%
    Very Easy A=82
    60
    21.74%

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    (Original post by germankid101)
    So I put this: CH3CH2CH2COH for the aldehyde. I know it doesn't directly highlight the C=O double bond but is it a structural formula.
    Yes, like others said I think you need it to be: CH3CH2CH2CHO for the mark. Probably easier to just draw out the display/skeletal next time. We shall see though.
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    For the but-2-ene question that asked how can it make N,P,Q,R etc

    It said structural formula so I put:

    CH3CHCHCH3 + HCL ------> CH3CH2CHCLCH3

    Instead of

    CH3CH=CHCH3 - would I still get 2 marks?? It said structural formula... I got the reagent and product right....
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    For the flow chart question did you have to put H20 for each one?


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    Can anyone tell me if my answers are right or wrong?

    For question 1c- suggest the structure of the cyclic hydrocarbon of octane
    I drew out a cyclic hydrocarbon with 6 sides and 2 methyl?

    For question 5c- Give an everyday use for infrared spectroscopy.
    I wrote hydrocarbon based

    For question on- Describe and explain how the concentration of ozone is maintained:
    I wrote O2 + O <=> O3

    For the question on: suggest why the compound burnt in yellow flame and produced black smoke. I wrote lack of oxygen but did not write incomplete combustion.

    Lastly, for the question on IR: suggest the two possible structures for M.
    For my final answer I wrote it could be aldehyde or ketone. So I drew the displayed formula of aldehyde or ketone which were butanal and butanone but I didn't write in words 'butanal and butanone'. Do you think I will still get the mark since it was asking for structure?
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    (Original post by Jimmy20002012)
    For the flow chart question did you have to put H20 for each one?


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    No. As h2o is not an organic product
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    (Original post by TheFootyKing19)
    No. As h2o is not an organic product
    Cool, thanks how did the exam go for you?


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    (Original post by Corvill)
    Can anyone tell me if my answers are right or wrong?

    For question 1c- suggest the structure of the cyclic hydrocarbon of octane
    I drew out a cyclic hydrocarbon with 6 sides and 2 methyl?

    For question 5c- Give an everyday use for infrared spectroscopy.
    I wrote hydrocarbon based

    For question on- Describe and explain how the concentration of ozone is maintained:
    I wrote O2 + O <=> O3

    For the question on: suggest why the compound burnt in yellow flame and produced black smoke. I wrote lack of oxygen but did not write incomplete combustion.

    Lastly, for the question on IR: suggest the two possible structures for M.
    For my final answer I wrote it could be aldehyde or ketone. So I drew the displayed formula of aldehyde or ketone which were butanal and butanone but I didn't write in words 'butanal and butanone'. Do you think I will still get the mark since it was asking for structure?
    1C) Should have been cyclo-octane
    5C) Breathalizers to test drunk drivers
    Ozone question - yeah I think that is correct.
    Lack of Oxygen should be fine
    You shouldn't need to state the names, as long as you drew the structures correctly .
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    For an everyday use of infrared spectroscopy would drug analysis be okay answer?


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    For and everyday use I put 'monitoring environmental pollution levels'?
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    For the question where you had to name the functional groups, could you have put carbonyl for the C=O
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    For the but-2-ene question that asked how can it make N,P,Q,R etc

    It said structural formula so I put:

    CH3CHCHCH3 + HCL ------> CH3CH2CHCLCH3

    Instead of

    CH3CH=CHCH3 - would I still get 2 marks?? It said structural formula... I got the reagent and product right....
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    (Original post by RoryTinker)
    For the question where you had to name the functional groups, could you have put carbonyl for the C=O
    Nope. It was Alkene and ester
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    (Original post by LaurenceM)
    For an everyday use of infrared spectroscopy would drug analysis be okay answer?


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    Thats wat i put too

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    (Original post by Freddy-Francis)
    Damn it. I lost 3 marks

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    Sorry to hear that :/
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    Guys for the last question i did one boltzman diagram (With both the catalyst and temperature on one diagram) followed by 2 sentences or so each on the effect of temp an catalyst seperetly. Would it still be possible to get 6/7 marks on this question it was out of 7 marks.


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    [URL=http://www.thestudentroom.co.uk
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    Hi for the van der waals question near the beggining of the exam i wrote has weaker van der waals forces and after that i wrote has fewer van der waals forces will i still get the mark
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    (Original post by scienceboy16)
    Guys for the last question i did one boltzman diagram (With both the catalyst and temperature on one diagram) followed by 2 sentences or so each on the effect of temp an catalyst seperetly. Would it still be possible to get 6/7 marks on this question it was out of 7 marks.


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    Not sure man, the question did ask for Diagrams so they may of expected us to use more than 1 diagram
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    (Original post by Freddy-Francis)
    How did U guys workout the fragment ions:fuhrer:

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    You had to work out fragment ions?? Where??
    Oh for the sulphur right??
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    (Original post by 344302)
    You had to work out fragment ions?? Where??
    Oh for the sulphur right??
    hmm?

    I put something like C2H5+ or something... ROFL
 
 
 
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