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1Medium

This question is about hydrocarbons.

Pentane and pentene are hydrocarbons containing five carbon atoms in each molecule. Pentane is an alkane and pentene is an alkene.

Match each hydrocarbon to its correct molecular formula from the list below:

$C5H8\text{C}_5\text{H}_8$
$C5H10\text{C}_5\text{H}_{10}$
$C5H12\text{C}_5\text{H}_{12}$
$C5H14\text{C}_5\text{H}_{14}$

[2]

Bromine water is added to separate samples of pentane and pentene. What would be observed in each case?

[2]

Ethane is an alkane and ethene is an alkene. Figure 1 shows the displayed structural formulae of ethane and ethene.

Ethane and ethene displayed structural chemical diagrams.

Compare ethane with ethene. You should refer to:

their structure and bonding
their reactions.

[6]

Reactions of alkenes and alcohols (chemistry only) Questions

Practise AQA GCSE Chemistry Reactions of alkenes and alcohols (chemistry only) with exam-style questions for Foundation and Higher tier. 20 questions covering Structure and formulae of alkenes, Reactions of alkenes, Alcohols, and Carboxylic acids, matched to the AQA GCSE Chemistry (8462) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.