Crude oil is a complex mixture of hydrocarbon molecules that is separated into simpler, useful mixtures called fractions using a fractional distillation column.
Figure 1 shows a simplified diagram of a fractional distillation column.
Which of the following describes a correct trend in the properties of the fractions as you move from the bottom of the column to the top?
The average size of the molecules increases.
The boiling points of the fractions decrease.
The viscosity of the fractions increases.
The ease of ignition decreases.
Fuels Questions
Practise Edexcel GCSE Chemistry Fuels with exam-style questions for Foundation and Higher tier. 100 questions, matched to the Edexcel GCSE Chemistry (1CH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.