Draw the isomers of pentane, hexane and heptane.

State the name of the functional group in the compound ${\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{OCH}}_2{\mathrm{CH}}_3$.

Identify the organic compounds that are unsaturated in the list below:

${\mathrm{H}}_2{\mathrm{CCH}}_2; {\mathrm{C}}_2{\mathrm{H}}_2; {\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{CH}}_3; {\mathrm{CH}}_3\mathrm{COOH}; {\mathrm{CH}}_3\mathrm{OH}$

The alkanes discussed in the text are either straight-chain or branched. However, there is a homologous series of alkanes known as cycloalkanes. The structure of cyclohexane (${\mathrm{C}}_6{\mathrm{H}}_{12}$) is shown below as a structural formula and a skeletal formula. Cyclohexane is a liquid at room temperature.

Deduce the general formula for the cycloalkanes and use it to predict the formulas for cycloheptane and cyclooctane.

The alkanes discussed in the text are either straight-chain or branched. However, there is a homologous series of alkanes known as cycloalkanes. The structure of cyclohexane (${\mathrm{C}}_6{\mathrm{H}}_{12}$) is shown below as a structural formula and a skeletal formula. Cyclohexane is a liquid at room temperature.

On an industrial scale cyclohexane is prepared by the hydrogenation of benzene (${\mathrm{C}}_6{\mathrm{H}}_6$). Formulate an equation summarising this reaction.