Hydrocarbons Practice Questions

Give the molecular formula of propane.

Draw the structure of a molecule of ethane, showing all covalent bonds.

Which compound is an alkene?

A W

B X

C Y

D Z

Give the molecular formula of butene.

Give the name of compound Y.

Explain why the alkanes are described as saturated hydrocarbons.

Name the functional group that is present in all alkenes.

Write the balanced equation for the complete combustion of propane.

Explain why this reaction is described as an oxidation of propane.

Draw the structure of a molecule of but-1-ene, showing all covalent bonds.

Draw the structure of a molecule of but-2-ene, showing all covalent bonds.

Explain why both of these molecules are unsaturated.

State the type of reaction that takes place between propene and bromine.

Draw the structure of the product of this reaction, showing all covalent bonds.

Give the name of the product of this reaction.

Deduce the molecular formula of Q.

You must show your working.

Give the name of Q.

Describe how bromine water can be used to identify which bottle contains hex-1-ene.

Your answer should include the observations for both liquids.

Write the balanced equation for the reaction of hex-1-ene with bromine.

Compare the bonding in molecules of ethane and ethene, and compare how the two gases behave when they are burned completely in oxygen and when they are shaken with bromine water.

You should include balanced equations for any chemical reactions you describe.

Show that the molecular formula of X is $\mathrm{C_5H_{10}}$.

Explain how the relative formula mass of the product shows that a molecule of X contains only one carbon–carbon double bond.

Draw the structure of one possible molecule of X, showing all covalent bonds.