Question 6
FThe displayed structures of two hydrocarbons are shown. A pupil says that the compound on the right has a carbon atom with too few bonds because it has fewer hydrogen atoms.
a.[3]
Use the lines in the displayed structures to explain why both carbon atoms in both molecules have the correct number of covalent bonds. Explain which compound is unsaturated.
b.[3]
Describe a chemical test that distinguishes the compounds, giving the observation for each. State why simply observing that both samples are gases would not distinguish them.
c.[2]
Draw the displayed structure of the product formed when one molecule of bromine adds to one molecule of the unsaturated compound.
10.2 Hydrocarbons Questions
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.