Chemistry 0620 · IGCSE · Fuels

Fuels — practice question

Petroleum is a valuable natural resource. The diagram illustrates how petroleum may be separated into useful substances. The diagram labels the fractions in order from the top down as follows: refinery gas, gasoline fraction, A, kerosene fraction, diesel oil, fuel oil fraction, lubricating oil fraction, with petroleum entering near the bottom and B leaving at the bottom.
(a)[2]

What is the separation process called that is shown in the diagram?

(b)[2]

Give the name of the fraction that leaves at: A B

(c(i))[2]

Suggest the names of two further refinery gases.

(c(ii))[2]

Write the chemical equation that shows the complete combustion of butane.

(c(iii))[1]

Name the poisonous gas formed by the incomplete combustion of butane.

(d(i))[2]

Describe how the stated properties differ. viscosity of the fuel flammability of the fuel

(d(ii))[1]

What difference between the molecules of gasoline and kerosene explains these property differences?

(e)[1]

Write the word equation for the overall reaction occurring in a hydrogen fuel cell.

Worked solution & mark scheme

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