A compound burns completely in oxygen. The only products are carbon dioxide and water.
Which conclusion about the compound is valid?
It is a hydrocarbon, as it must contain only carbon and hydrogen
It contains carbon and hydrogen, and it may also contain oxygen
It must contain oxygen, as both of the products contain oxygen
It is an alkane, as only alkanes burn to give these two products
130 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.