How many straight chain isomers are possible for the molecular formula ${\mathrm{C}}_5{\mathrm{H}}_8$. Draw their structures.

Group the following into saturated and unsaturated hydrocarbons.

Note: The above given question in the book has error and the modified question is stated below.

Define saturated and unsaturated hydrocarbons by giving examples.

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(Position isomerism, homologous series, alkanes, isomers, chain isomerism, catenation)

This hydrocarbon only has single bonds.

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(Position isomerism, homologous series, alkanes, isomers, chain isomerism, catenation)

Carbon has the ability to form strong bonds with atoms of other elements. But what is more special is the ability to bond strongly with other carbon atoms.

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(Position isomerism, homologous series, alkanes, isomers, chain isomerism, catenation)

Molecules having same molecular formula but different structural formula.

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(Position isomerism, homologous series, alkanes, isomers, chain isomerism, catenation)

Butane and 2-methylpropane exhibits this type of isomerism.

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(Position isomerism, homologous series, alkanes, isomers, chain isomerism, catenation)

Isomerism that can be exhibited by alkenes and alkynes but not alkanes.

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(Position isomerism, homologous series, alkanes, isomers, chain isomerism, catenation)

Members of this series show a regular gradation in their physical properties.