Row Fraction Use 1 refinery gases bottled gas for cooking 2 gasoline fuel for cars 3 kerosene fuel for aircraft 4 bitumen fuel for lorries The table matches...
Question 1 Report
| Row | Fraction | Use |
|---|---|---|
| 1 | refinery gases | bottled gas for cooking |
| 2 | gasoline | fuel for cars |
| 3 | kerosene | fuel for aircraft |
| 4 | bitumen | fuel for lorries |
The table matches four petroleum fractions to their uses. One row contains an incorrect use. Which row is wrong?
Answer Details
Each fraction is used according to its boiling range and viscosity. Refinery gases are small, very volatile molecules, ideal as bottled gas; gasoline is the fraction used in car engines; kerosene is the aviation fuel. Those three uses are all correct.
The incorrect pairing is the row listing bitumen as fuel for lorries. Bitumen is the thick, almost solid residue left at the bottom of the column, with very large molecules and a very high boiling point. It is far too viscous to be pumped into an engine or vaporised for burning, so it is used to surface roads and roof buildings instead. Lorries run on diesel oil.
Match each fraction's use to its physical properties: light fractions burn easily, heavy fractions are used for surfacing and lubrication.
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