IB Organic Chemistry Isomerism Quiz

What is the definition of isomerism in organic chemistry?

• Isomerism in organic chemistry refers to compounds with the same molecular formula and similar structural arrangements or spatial orientations.

• Isomerism in organic chemistry refers to compounds with the same molecular formula but different structural arrangements or spatial orientations.

• Isomerism in organic chemistry refers to compounds with different molecular formulas but identical structural arrangements or spatial orientations.

• Isomerism in organic chemistry refers to compounds with the same molecular formula and identical structural arrangements or spatial orientations.

What are the two main types of isomerism?

• geometric isomerism and optical isomerism

• cis-trans isomerism and enantiomerism

• constitutional isomerism and conformational isomerism

• structural isomerism and stereoisomerism

What is structural isomerism?

• Different structural arrangements of atoms

• Different chemical properties of atoms

• Different spatial arrangements of atoms

• Different isotopes of atoms

Give an example of a pair of compounds that exhibit structural isomerism.

• ethanol and ethanoic acid

• propane and propene

• methanol and methylamine

• butane and isobutane

What is stereoisomerism?

• Stereoisomerism is a type of isomerism where compounds have the same molecular formula but differ in the connectivity of atoms.

• Stereoisomerism is a type of isomerism where compounds have the same molecular formula and connectivity but differ in the number of atoms.

• Stereoisomerism is a type of isomerism where compounds have the same molecular formula and connectivity but differ in the arrangement of atoms in space.

• Stereoisomerism is a type of isomerism where compounds have the same molecular formula and connectivity but differ in the physical state.

What is the difference between geometric isomerism and optical isomerism?

• Geometric isomerism is based on the arrangement of atoms, while optical isomerism is based on mirror image isomers.

• Geometric isomerism is based on the number of isomers, while optical isomerism is based on the arrangement of atoms.

• Geometric isomerism is based on the mirror image isomers, while optical isomerism is based on the number of isomers.

• Geometric isomerism is based on the polarity of molecules, while optical isomerism is based on the arrangement of atoms.

Give an example of a compound that exhibits geometric isomerism.

• cis-2-pentene and trans-2-pentene

• cis-1-butene and trans-1-butene

• cis-3-hexene and trans-3-hexene

• cis-2-butene and trans-2-butene

What is the difference between cis and trans isomers?

• The difference between cis and trans isomers is the presence of a double bond.

• The difference between cis and trans isomers is the number of carbon atoms in the molecule.

• The difference between cis and trans isomers is the molecular weight of the compound.

• The difference between cis and trans isomers is the arrangement of substituents around a double bond or a ring.

What is the difference between enantiomers and diastereomers?

• Enantiomers are mirror images, while diastereomers are not.

• Enantiomers have opposite stereochemistry, while diastereomers have the same stereochemistry.

• Enantiomers have different molecular formulas, while diastereomers have the same molecular formula.

• Enantiomers have the same physical properties, while diastereomers do not.

Give an example of a compound that exhibits optical isomerism.

• 2-butanol

• methanol

• ethanol

• propanol