Crude oil is found in the Earth’s crust - Edexcel - GCSE Chemistry - Question 5 - 2018 - Paper 1
Question 5
Crude oil is found in the Earth’s crust.
(a) Which of the statements about crude oil is correct?
A crude oil is a finite resource
B crude oil is a mixture ... show full transcript
Worked Solution & Example Answer:Crude oil is found in the Earth’s crust - Edexcel - GCSE Chemistry - Question 5 - 2018 - Paper 1
Step 1
Which of the statements about crude oil is correct?
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Answer
The correct statement is B: crude oil is a mixture of the elements hydrogen and carbon. Crude oil primarily consists of hydrocarbons, which are compounds made from hydrogen and carbon atoms.
Step 2
These substances
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Answer
The correct answer is C: are in the same homologous series. Ethane, octane, and pentadecane are all alkanes, which belong to the same series characterized by the general formula CₙH₂ₙ₊₂.
Step 3
Use a word from the box to complete each of the sentences about the fractional distillation of crude oil.
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Answer
Before crude oil is passed into the column, it is heated. During the distillation, vapour rises up the column until it is cold enough for the vapour to form a liquid. The vapour has been condensed.
