Level 13 Level 15
16 words 0 ignored
Ready to learn Ready to review
Check the boxes below to ignore/unignore words, then click save at the bottom. Ignored words will never appear in any learning session.
the breaking down of long-chained alkanes into a shorter-change alkane and an alkene
Cracking is an example of this processt. Thee breaking up of a chemical substance with heat into at least two chemical substances.
A long chain hydrocarbon is heated until is vaporises and is then passed over a hot catalyst (often auminium oxide).
Alkane and alkene
The two hydrocarbons produced during cracking
alkene general formula
Unsaturated hydrocarbon containing a carbon–carbon double bond.
A test for unstaturated substances. Bromine water turns from orange to colourless
A use of some of the products from cracking
A very large molecule that is composed of many small, repeating structural units.
the polymer made from the polymerisation of ethene
the polymer made from the polymerisation of propene
a useful polymer. It is waterproof and breathable making it an excellent material for outdoor clothing
a significan problem with the use of polymers. Tbey are not broken down by microorganisms and so this leads to problems with waste disposal