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AQA GCSE CHEMISTRY Unit 1 Question Game! watch

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    Like we did for Biology, let's answer the question the person above you asks and then ask a question that the person underneath you has to answer!

    Start me off!
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    how are hydrocarbons cracked
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    (Original post by jackbarry1999)
    how are hydrocarbons cracked
    I've done C1 last yr but an answer:
    Cracking allows large hydrocarbon molecules to be broken down into smaller, more useful hydrocarbon molecules. Fractions containing large hydrocarbon molecules are heated to vaporise them. They are then either:
    • - passed over a hot catalyst, or
    • - mixed with steam and heated to a very high temperature.
    These processes break chemical bonds in the molecules, causing thermal decomposition reactions. Cracking produces smaller alkanes and alkenes (another type of hydrocarbon).
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    What is an ore?

    How are metals extracted from their ore?
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    What are the conditions needed to harden vegetable oils?
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    (Original post by MaxHSloan)
    What are the conditions needed to harden vegetable oils?
    Add hydrogen, over a nickel catalyst and at 60c.
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    (Original post by MaxHSloan)
    What are the conditions needed to harden vegetable oils?
    Hydrogen to react with oil, presence pf nickel catalyst, 60 degrees celsius

    What are the main steps in the carbon cycle?
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    (Original post by 4dam)
    Hydrogen to react with oil, presence pf nickel catalyst, 60 degrees celsius

    What are the main steps in the carbon cycle?
    This is for chemistry, B1 was yesterday. Carbon cycle still didnt come up :/
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    (Original post by 4dam)
    Hydrogen to react with oil, presence pf nickel catalyst, 60 degrees celsius

    What are the main steps in the carbon cycle?
    Carbon cycle is not on the specification for chemistry, but knowing AQA it will be on the first page of it
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    What are the two ways ethanol can be produced?
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    (Original post by IAmAnTroll)
    Carbon cycle is not on the specification for chemistry, but knowing AQA it will be on the first page of it
    Yep, confused, limestone cycle (thinking calcium carbonate)
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    How is air separated into gases?
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    (Original post by IAmAnTroll)
    What are the two ways ethanol can be produced?
    1. Fermentation
    2. Reacting Ethene and Steam
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    (Original post by IAmAnTroll)
    What is an ore?

    How are metals extracted from their ore?
    A metal compound within a rock and depending on their reactivity they could etiher by displaced by carbon or electrolysed
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    (Original post by IAmAnTroll)
    What are the two ways ethanol can be produced?
    Fermentation of sugar with yeast in a solution.

    React ethene and steam together at 300 degrees
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    Does anyone know if we need to know the catalyst for reacting steam with ethene?
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    (Original post by Jamie Vardy)
    How is air separated into gases?
    air is liquified then heated argon, nitrogen and oxygen then separate out according to their boiling point
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    (Original post by IAmAnTroll)
    What are the two ways ethanol can be produced?
    Fermentation or through craking of crude oil??
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    (Original post by MaxHSloan)
    Does anyone know if we need to know the catalyst for reacting steam with ethene?
    nope no catalyst
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    (Original post by Jamie Vardy)
    How is air separated into gases?
    Fractional distillation of air, air cooled, different gases have different boiling points so condense at different areas of collum, splitting up the air.
 
 
 
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