Isomerism Quiz for A-Level Students

Which of the following is NOT a type of structural isomerism?

• Chain isomerism

• Position isomerism

• Functional group isomerism

• Geometric isomerism

Which pair of compounds are functional group isomers?

• Propanol and Propanone

• Butane and 2-Methylpropane

• 1-Butene and 2-Butene

• Ethanoic acid and Propanoic acid

Which statement best describes chain isomerism?

• The same molecular formula but different connectivity of atoms

• The same molecular formula but different arrangements of the carbon chain

• The same molecular formula but different functional groups

• The same molecular and structural formula but different spatial arrangement

Which of the following is an example of position isomerism?

• Butan-1-ol and Butan-2-ol

• Ethanoic acid and Methyl methanoate

• Pentane and Cyclopentane

• Butane and 2-Methylpropane

Which type of isomerism is observed between propan-1-ol and methoxyethane?

• Chain isomerism

• Position isomerism

• Functional group isomerism

• Geometric isomerism

What is the main requirement for a molecule to exhibit geometric isomerism?

• The presence of a functional group

• The presence of a carbon-carbon double bond

• The presence of at least one chiral centre

• The ability of atoms to rotate freely around a single bond

Which of the following alkenes can show E/Z isomerism?

• Propene

• But-2-ene

• 2-Methylpropene

• Ethene

How are E/Z isomers determined?

• By the longest carbon chain in the molecule

• By the priority of groups on each carbon of the C=C bond, using the Cahn-Ingold-Prelog rules

• By whether the molecule is cyclic or not

• By the type of functional groups present

Which of the following correctly describes an E-isomer?

• The two highest priority groups are on the same side of the C=C bond

• The two highest priority groups are on opposite sides of the C=C bond

• The molecule has a different functional group compared to another isomer

• The molecule has a different connectivity of atoms compared to another isomer

Why don’t alkanes exhibit geometric isomerism?

• They have no functional groups

• They do not contain a carbon-carbon double bond

• They do not have chiral centres

• Their molecules are too small