Use a word from the box to complete each of the sentences about the fractional distillation of crude oil.
| condensed | dissolved | evaporated | filtered | heated |
Each word may be used once, more than once, or not at all. The separation of crude oil into useful fractions is carried out in a fractionating column.
To turn the hydrocarbons in the crude oil into a mixture of gases before entering the column, the crude oil is first .....
When a hydrocarbon gas rises up the column and reaches a temperature below its boiling point, it turns back into a liquid. The hydrocarbon has been .....
105 exam-style questions on Edexcel GCSE Chemistry 9.1 Fuels, covering 9.1.1 Hydrocarbons and crude oil, 9.1.2 Fractional distillation of crude oil and its fractions, 9.1.3 The alkanes as a homologous series, 9.1.4 Complete and incomplete combustion, 9.1.5 Pollutants from burning fuels, 9.1.6 Hydrogen as a fuel and non-renewable fossil fuels, and 9.1.7 Cracking of larger alkanes. Each one has a worked solution and a mark scheme showing where the marks go.