Crude oil is a fossil fuel formed over millions of years.
Which statement about crude oil is correct?
Crude oil is a mixture consisting mainly of hydrocarbons called alkanes.
Crude oil was formed from the remains of ancient trees and ferns that grew on land.
The different compounds in crude oil can be separated from each other using filtration.
The atoms in the hydrocarbon molecules in crude oil are held together by ionic bonds.
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.