Alkenes

1 State that the bonding in alkenes includes a double carbon–carbon covalent bond and that alkenes are unsaturated hydrocarbons

2 Describe the manufacture of alkenes and hydrogen by cracking of larger alkane molecules using a high temperature and a catalyst

3 Describe the reasons for the cracking of larger alkane molecules

4 Describe the test to distinguish between saturated and unsaturated hydrocarbons by their reaction with aqueous bromine

5 State that in an addition reaction only one product is formed

6 Describe the properties of alkenes in terms of addition reactions with: (a) bromine or aqueous bromine (b) hydrogen in the presence of a nickel catalyst (c) steam in the presence of an acid catalyst and draw the structural or displayed formulae of the products