Most of the fuels used today are obtained from crude oil - Edexcel - GCSE Chemistry Combined Science - Question 5 - 2019 - Paper 1
Question 5
Most of the fuels used today are obtained from crude oil.
(a) Which statement about crude oil is correct?
A crude oil is a compound of different hydrocarbons
B... show full transcript
Worked Solution & Example Answer:Most of the fuels used today are obtained from crude oil - Edexcel - GCSE Chemistry Combined Science - Question 5 - 2019 - Paper 1
Step 1
Which statement about crude oil is correct?
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Answer
The correct statement is B: crude oil is a mixture of hydrocarbons. This means that it consists of various types of hydrocarbons rather than being a single compound or a uniform supply.
Step 2
State a use for each of these fractions.
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Answer
kerosene: used as fuel for aircraft / jets / lamps / cooking / heaters / fire-lighters / rocket fuel.
diesel oil: used for cars / trains / trucks / lorries / vehicles / tractors / generators / boats.
Step 3
Choose a property.
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Answer
A relevant property to compare is 'boiling point'. Kerosene has a lower boiling point compared to diesel oil, meaning that it vaporizes at a lower temperature.
Step 4
State how this property for kerosene compares with the property for diesel oil.
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Answer
Kerosene has a lower boiling point compared to diesel oil, which results in kerosene vaporizing quicker than diesel oil under similar conditions.
