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GCSE
Gcse Science
Chemistry - Crude Oil (Aqa)
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Q.1
Crude oil is a mixture of what?
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Two or more elements or compounds not chemically combined together
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Two or more elements or compounds chemically combined together
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Hydrocarbons combined together with water and gas
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Mainly alkanes
Q.2
What are hydrocarbons?
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Long chain molecules made from water and carbon
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Short chain molecules made from water and carbon
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Chemicals made from hydrogen and carbon chemically joined together
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A food group that provides energy
Q.3
Which of the following best describes most of the hydrocarbons in crude oil?
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Saturated
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Soaked
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Soggy
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Unsaturated
Q.4
Which of the following best describes the saturated hydrocarbons in oil?
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Alcohols
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Aldehydes
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Alkenes
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Alkanes
Q.5
The formula of any alkane can be worked out from which of the following?
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CnH2n
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CnH3n
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CnH2n+2
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CnHn
Q.6
How are the different hydrocarbons separated from crude oil?
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Filtering
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Centrifuging
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Fractional distillation
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Separating funnel
Q.7
Which of the following lists contains the words missing from the following passage in the correct order? The many __________ in crude oil may be separated into fractions by ___________ the oil and allowing it to condense at a number of different ___________. This process is ___________ distillation.
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temperatures, evaporating, hydrocarbons, fractional
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hydrocarbons, evaporating, temperatures, fractional
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chemicals, evaporating, hydrocarbons, fractional
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fuels, heating, places, evaporating
Q.8
Which of the following best describes the smaller hydrocarbons when compared to large hydrocarbons?
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The smaller hydrocarbons are more viscous
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The smaller hydrocarbons are less flammable
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The smaller hydrocarbons are more volatile
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The smaller hydrocarbons produce more soot when they burn
Q.9
The process of breaking down of the larger hydrocarbons to smaller, more useful chemicals is called what?
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Smashing
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Cracking
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Splitting
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Breaking
Q.10
Crude oil is made from alkanes. During cracking what other type of hydrocarbon is produced and how is it different from the alkanes?
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Ethene is produced and it is colourless
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Alkyne is produced and it is odourless.
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Alcohol is produced and it is inflammable
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Alkene is produced and it has a double covalent bond
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