Alkenes

What the syllabus asks of you

• State that the bonding in alkenes includes a double carbon–carbon covalent bond and that alkenes are unsaturated hydrocarbons
• Describe the manufacture of alkenes and hydrogen by the cracking of larger alkane molecules using a high temperature and a catalyst
• Describe the reasons for the cracking of larger alkane molecules 5 State that in an addition reaction only one product is formed
• Describe the test to distinguish between 6 Describe the properties of alkenes in terms of saturated and unsaturated hydrocarbons by addition reactions with: their reaction with aqueous bromine (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