Petrol is a fuel used in cars - Edexcel - GCSE Chemistry - Question 6 - 2018 - Paper 1
Question 6
Petrol is a fuel used in cars.
(a) Complete the sentence by putting a cross (✗) in the box next to your answer.
Petrol is obtained from crude oil.
The process used... show full transcript
Worked Solution & Example Answer:Petrol is a fuel used in cars - Edexcel - GCSE Chemistry - Question 6 - 2018 - Paper 1
Step 1
6(a) Complete the sentence by putting a cross (✗) in the box next to your answer.
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Answer
The correct answer is D: fractional distillation. This process involves separating components of crude oil based on their boiling points, thus allowing petrol to be extracted.
Step 2
6(b)(i) One of the substances found in petrol is octane, C8H18. Explain which of the substances, P, Q or R, is octane.
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Answer
To identify which substance is octane, we need to look for a molecule with the chemical formula C8H18. By counting the carbon and hydrogen atoms, we can confirm that octane, which has 8 carbon atoms and 18 hydrogen atoms, matches the properties of substance P.
