The molecules in one fraction of crude oil are similar to each other. In which way are they similar?
They all contain the same number of hydrogen atoms.
They all contain the same number of oxygen atoms.
They contain a similar number of carbon atoms.
They contain a similar number of oxygen atoms.
40 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.