1.1. This question is about alkanes and alkenes.

Complete the boxes by giving the missing information about the alkene with the molecular formula C₂H₄.

1.2. Alkenes are unsaturated hydrocarbons. 

State what is meant by the terms unsaturated and hydrocarbon.

1.3. Butene, C₄H₈, is a member of the same homologous series as C₂H₄. 

Use the words in the box to complete the sentences.

Butene, C₄H₈, and C₂H₄ have the same .................... formula and .................... group. 

They will show similar .................... properties but there will be differences in their .................... properties, such as density and boiling point.

1.4. When the alkene butene reacts with bromine, the product is dibromobutane, C₄H₈Br₂.

i) Give a word equation for this reaction.

(1)

ii) What is the name of this type of reaction?

(1)