Fractional distillation is used to separate crude oil into a range of other substances. The process uses a fractionating column. Which statement about fractional distillation is / are correct? 1 Propane, C₃H₈, is found in the fraction obtained from the top of the column. 2 Crude oil is heated before it enters the bottom of the column. A 1 only B 2 only C Both 1 and 2 D Neither 1 nor 2

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Fractional distillation is used to separate crude oil into a range of other substances - OCR Gateway - GCSE Chemistry: Combined Science - Question 1 - 2021 - Paper 10

Question 1

Fractional distillation is used to separate crude oil into a range of other substances. The process uses a fractionating column. Which statement about fractional d... show full transcript

Worked Solution & Example Answer:Fractional distillation is used to separate crude oil into a range of other substances - OCR Gateway - GCSE Chemistry: Combined Science - Question 1 - 2021 - Paper 10

Step 1

1 Propane, C₃H₈, is found in the fraction obtained from the top of the column.

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Answer

This statement is correct. In fractional distillation, lighter components like propane are found at the top of the fractionating column where the temperature is lower.

Step 2

2 Crude oil is heated before it enters the bottom of the column.

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This statement is also correct. Crude oil is heated before entering the column to create vapor that can rise through the column for separation.

Step 3

Final Answer

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Answer

Since both statements 1 and 2 are correct, the answer is C: Both 1 and 2.

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