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
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 method is used to separate different components of crude oil based on their boiling points.
Step 2
Explain which of the substances, P, Q or R, is octane.
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Answer
The molecular formula for octane is C₈H₁₈, which indicates it has 8 carbon atoms and 18 hydrogen atoms. After analyzing substances P, Q, and R, it is evident that substance R has the correct number of carbon and hydrogen atoms. Furthermore, substance R has no double bonds, making it a saturated alkane.
