Reactions of alkenes and alcohols (chemistry only)

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Question 7
Medium

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.

a.

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

  • C5H8\text{C}_5\text{H}_8C5​H8​
  • C5H10\text{C}_5\text{H}_{10}C5​H10​
  • C5H12\text{C}_5\text{H}_{12}C5​H12​
  • C5H14\text{C}_5\text{H}_{14}C5​H14​
[2]
b.

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

[2]
c.

Butane is an alkane and but-1-ene is an alkene. Figure 1 shows the displayed structural formulae of butane and of but-1-ene.

Figure 1: Displayed structural formulae of butane and but-1-ene

Compare butane with but-1-ene. You should refer to:

  • their structure and bonding
  • their reactions.
[6]

Reactions of alkenes and alcohols (chemistry only) Questions

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