Which substances can be obtained by cracking hydrocarbons?
ethanol and ethene
ethanol and hydrogen
ethene and hydrogen
ethene and poly(ethene)
Which reaction is used to make ethanol?
adding steam to ethene
fractional distillation of petroleum
reacting ethene with aqueous bromine
Polymers are long-chain molecules made from small molecules linked together.
Four polymers or types of polymer are listed.
Which of these polymers or types of polymer are synthetic?
A 1 and 3
B 1 and 4
C 2 and 3
D 2 and 4
Which compounds belong to the same homologous series?
A ethane and propane
B ethanoic acid and ethanol
C methane and ethene
D propene and ethanoic acid
The equations for two important processes used to manufacture ethanol are shown.
Which statement is not correct?
The statements below are about the alcohol homologous series.
The alcohols have the same ......1...... formula.
The alcohols have ......2...... chemical properties because they have the same......3...... .
The melting points of the alcohols ......4...... as the number of carbon atoms increases.
Which words correctly complete gaps 1–4?