A materials company tests three gas samples with bromine water before selecting a sample to use as a raw material for making polymers. The results are shown in the table.
| Gas sample | Result with bromine water |
|---|---|
| A | Bromine water remains orange |
| B | Bromine water changes from orange to colourless |
| C | Bromine water remains orange |
Which gas sample should the company select? Explain your choice.
91 exam-style questions on AQA GCSE Chemistry 7.1 Carbon compounds as fuels and feedstock, covering 7.1.1 Crude oil, hydrocarbons and alkanes, 7.1.2 Fractional distillation and petrochemicals, 7.1.3 Properties of hydrocarbons, and 7.1.4 Cracking and alkenes. Each one has a worked solution and a mark scheme showing where the marks go.