Chemistry 5070 · O Level · Alkenes

Alkenes — practice question

Propene belongs to the alkene family. It may be prepared from a three-carbon alcohol, $\text{C}_3\text{H}_7\text{OH}$, using the apparatus shown. The reaction equation is $\text{C}_3\text{H}_7\text{OH} \rightarrow \text{C}_3\text{H}_6 + \text{H}_2\text{O}$.
(a(i))[1]

Name the three-carbon alcohol used to produce propene.

(a(ii))[1]

Suggest why aluminium oxide is included in this reaction.

(a(iii))[1]

Draw the structure of propene with all atoms and bonds shown.

(b)[2]

Describe the test used to show that propene is unsaturated. State the test and the observation.

(c(i))[2]

During complete combustion of propene in air, water and a colourless gas are formed. Name the colourless gas. Give a test and observation to identify this gas.

(c(ii))[2]

Construct an equation showing the complete combustion of propene.

Worked solution & mark scheme

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