A teacher has two gas jars. One contains ethane and the other contains ethene. The labels have fallen off.
Describe a chemical test that could be used to show which gas jar contains ethene. Give the result for each gas.
Ethene reacts with bromine. Name the type of reaction that takes place.
Complete the balanced equation for the reaction of ethene with bromine.
C2H4+Br2→\mathrm{C_{2}H_{4}} + \mathrm{Br_{2}} \rightarrowC2H4+Br2→
Describe the structure of a molecule of the product.
Explain why ethane does not react in this test.
36 exam-style questions on Edexcel GCSE Chemistry 10.2 Hydrocarbons, covering 10.2.1 Formulae and structures of the alkanes, 10.2.2 Alkenes and the C=C functional group, 10.2.3 Addition reactions of alkenes and testing for unsaturation, and 10.2.4 Combustion of alkanes and alkenes. Each one has a worked solution and a mark scheme showing where the marks go.