May/June 2026 Paper 41

This question is about hydrocarbons. Alkanes are a homologous series of hydrocarbons. State what is meant by the term hydrocarbon.

State two characteristics that all individual members of the same homologous series have in common.

Give the molecular formula of the alkane that has 10 carbon atoms.

Propane reacts with chlorine in a photochemical reaction. An equation for the reaction is shown.

State the meaning of the term photochemical.

Draw the displayed formula of two structural isomers with the formula C${}_3$H${}_7$Cl.

Addition polymers are made from alkenes. Give the empirical formula of all alkenes.

Name two unbranched alkene molecules that each contain four carbon atoms.

Complete Figure 7.1 to show one repeat unit of the addition polymer formed from propene.