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Crude oil is separated into different fractions by fractional distillation - Edexcel - GCSE Chemistry - Question 6 - 2016 - Paper 1
Question 6
Crude oil is separated into different fractions by fractional distillation. (a) Fraction X is obtained from near the top of the fractionating column. Fraction Y is ... show full transcript
Worked Solution & Example Answer:Crude oil is separated into different fractions by fractional distillation - Edexcel - GCSE Chemistry - Question 6 - 2016 - Paper 1
Step 1
Which row of the table shows the boiling point, ease of ignition and viscosity of fraction X compared with fraction Y?
Answer
The correct answer is row C.
- Boiling Point: Fraction X, being lighter and obtained from the top of the fractionating column, has a higher boiling point than fraction Y, which is heavier.
- Ease of Ignition: Fraction Y has a higher flash point, making it more difficult to ignite compared to fraction X.
- Viscosity: Fraction X, being lighter, has lower viscosity compared to fraction Y, which is more viscous.
Step 2
Step 3
Explain how the product of combustion of this impurity in a fuel can damage the environment.
Answer
The product of combustion of sulfur in fuels primarily produces sulfur dioxide (SO₂).
- Acid Rain: Sulfur dioxide can react with water in the atmosphere to form sulfuric acid, contributing to acid rain, which can harm aquatic ecosystems, damage vegetation, and corrode buildings and infrastructure.
- Air Quality: Sulfur dioxide is also a significant air pollutant and can lead to respiratory problems in humans, influencing overall air quality and public health.