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    (Original post by 0lut0)
    Was the question about what colour it changes to was it green?

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    Colorless. Clear and transparent will likely get you no marks.
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    TSR Community Team
    (Original post by Adzkii786)
    1)
    Draw the diagram - 2 on the inner shell, 3 on the outershell
    a) i) Proton, Neutrons - Neutrons neutral charge, Protons +1 charge (mis-read and wrote about electrons )
    a) ii) Got 8 on its outer shell, doesen't have 1 blah blah.

    2) a) i0 20.3

    Black - incomplete combustion/zoot C
    Hexane - more flammable, less smoke, and it produced more energy.

    3) Thermal decomposition, Copper Oxide
    Which exam board is this for?
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    [QUOTE=a_homida;64946899]
    (Original post by ScienceFantatic)
    Question 1
    nucleus( 1 mark)
    ( +1), electrons( -1), neutron is uncharged( 3 marks)

    Do you think i'd get the marl for saying protons are positive and neutrons are neutral?
    Pretty certain it must be +1 and 0.
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    (Original post by homeland.lsw)
    ScienceFantatic


    Um the question on recycling, reusing and landfill.
    Recycling is used to save raw materials...
    I'll add that in I talked about saving energy and reducing fossil fuels
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    (Original post by lunaticash19995)
    No i believe it was talking about z which was the nucleus
    It was the nucleus, so protons and neutrons. NOT electrons.
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    (Original post by surina16)
    and do you think you had to include a disadvantage of reusing materials? I listed 3 disadvantages of landfill or something
    I did, I said landfill-destroying habitats, pollution
    reusing-uses weak materials, unsafe
    recycling- saves raw materials
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    (Original post by ScienceFantatic)
    I'll add that in I talked about saving energy and reducing fossil fuels
    Any other questions?

    Soot is produced due to incomplete combustion
    (just trying to remember questions to help )
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    (Original post by Puddles the Monkey)
    Which exam board is this for?
    AQA
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    For the question with cracking I said that the hydrocarbons are vaporised
    Then passed over a hot catalyst like aluminium oxide


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    (Original post by homeland.lsw)
    I did, I said landfill-destroying habitats, pollution
    reusing-uses weak materials, unsafe
    recycling- saves raw materials
    I think so because I remember the question saying give 3 reasons why the car is reused and not recycled or sent to landfill sites.
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    (Original post by homeland.lsw)
    Any other questions?

    Soot is produced due to incomplete combustion
    (just trying to remember questions to help )
    Yeah I got that I think think I need about 5 more marks
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    6 marker:

    - Hydrogen + oxygen produces only water
    - Petrol produces CO2 --> global warming
    - Petrol produces SO2 --> acid rain, damage engine
    - N and O from air react in petrol engine --> NO2 and NO --> Hazerdous to health
    - Petrol from crude oil --> Non renewable
    - Hydrogen can be produced from electrolysis of water --> Renewable
    - Hydrogen releases more energy per g burnt --> Better fuel, more efficient
    - Hydrogen stored as explosive gas --> Safety issues

    Were some more but I can't recall them all at this time
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    Only got 19 marks so far.
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    (Original post by homeland.lsw)
    I did, I said landfill-destroying habitats, pollution
    reusing-uses weak materials, unsafe
    recycling- saves raw materials
    Recycling can be more costly due to the process of eliminating impurities. Wasn't question what was the pros and cons of REUSING not recycling?

    Reusing means no more land fill mass will accumulate. No process of purifying the substance. Less cost in reusing.

    The cons I can't remember what I wrote at the moment!
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    (Original post by ScienceFantatic)
    Yeah I got that I think think I need about 5 more marks
    Which ones? Boundaries will be high for this one :eek:

    (Original post by SmithAmelia)
    I think so because I remember the question saying give 3 reasons why the car is reused and not recycled or sent to landfill sites.
    It was give three reasons why the car body is recycled instead of being sent to a landfill site or reused
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    (Original post by SmithAmelia)
    I think so because I remember the question saying give 3 reasons why the car is reused and not recycled or sent to landfill sites.
    no the question was give 3 reasons why the car is recycled and not reused or sent to landfill sites.
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    (Original post by Billybob17283)
    no the question was give 3 reasons why the car is recycled and not reused or sent to landfill sites.
    I only just realised. Thank you
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    (Original post by redsoules)
    Recycling can be more costly due to the process of eliminating impurities. Wasn't question what was the pros and cons of REUSING not recycling?

    Reusing means no more land fill mass will accumulate. No process of purifying the substance. Less cost in reusing.

    The cons I can't remember what I wrote at the moment!
    I'm sure it was the benefits of recycling compared to reusing and landfill sites. :beard:
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    Q5 on hardening oils: Might also be marks available for mentioning that unsaturated fats have double carbon carbon bonds and hydrogenation breaks these bonds to lower melting point
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    (Original post by redsoules)
    Recycling can be more costly due to the process of eliminating impurities. Wasn't question what was the pros and cons of REUSING not recycling?

    Reusing means no more land fill mass will accumulate. No process of purifying the substance. Less cost in reusing.

    The cons I can't remember what I wrote at the moment!
    Definitely recycling, not reusing.
 
 
 
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