CAIE IGCSE Chemistry 11.1.6 An Unsaturated Compound Has Molecules Questions

Work through real CAIE IGCSE Chemistry questions to define unsaturation and identify hydrocarbons containing carbon–carbon double or triple bonds.

Exam points

define an unsaturated compound by stating that one or more carbon–carbon bonds are not single bonds
identify unsaturated hydrocarbons from displayed structures or formulae containing carbon–carbon multiple bonds

[Maximum number: 1]

Which statement about unsaturated hydrocarbons is correct?

$\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}=\mathrm{CHCH}_{3}$ is an unsaturated hydrocarbon.

Ethene has more hydrogen atoms per molecule than ethane.

Unsaturated hydrocarbons have double bonds between carbon and hydrogen atoms.

Unsaturated hydrocarbons turn aqueous bromine from colourless to brown.

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