Exploring Constitutional Isomers

Which of the following is an example of chain isomers?

• Ethane and propane

• Butane and isobutane

• Pentane and hexane

• Cyclohexane and cyclopentane

What distinguishes positional isomers from other isomers?

• Positional isomers are formed through different types of chemical bonds.

• Positional isomers are identical in structure but differ in energy.

• Positional isomers have different molecular formulas.

• Positional isomers differ in the position of functional groups on the same carbon skeleton.

Which of the following compounds are functional group isomers?

• Ethanol and ethanol

• Ethanol and dimethyl ether

• Dimethyl ether and propanol

• Butanol and isobutanol

How many chain isomers can be formed from C4H10?

• 4

• 2

• 1

• 3

Which of the following is a characteristic of positional isomers?

• They differ in the arrangement of atoms in a ring structure.

• They are identical in structure and properties.

• They have the same molecular formula but different molecular weights.

• They differ in the position of a functional group or substituent.

Identify the functional group isomer of C2H6O.

• Acetaldehyde and Ethylene Glycol

• Ethanol and Dimethyl Ether

• Propanol and Butanol

• Isopropanol and Ethylene Oxide

Which of the following pairs are chain isomers?

• Cyclobutane and butene

• Butane and propane

• Pentane and hexane

• Butane and isobutane

What is the main difference between functional group isomers and chain isomers?

• Functional group isomers are always cyclic; chain isomers are always linear.

• Functional group isomers have the same carbon chain; chain isomers have different functional groups.

• Functional group isomers differ in molecular weight; chain isomers differ in boiling points.

• Functional group isomers differ in functional groups; chain isomers differ in carbon chain arrangement.

How do you determine the number of possible positional isomers for a given compound?

• Positional isomers can only exist in cyclic compounds.

• The number of possible positional isomers depends on the functional groups and their positions on the carbon skeleton.

• The number of possible positional isomers is determined solely by the molecular weight.

• The number of isomers is fixed and does not change with different functional groups.

Which of the following statements is true about isomers?

• Isomers have different molecular formulas but the same structure.

• Isomers are always identical in chemical properties.

• Isomers cannot exist for the same molecular formula.

• Isomers have the same molecular formula but different structures.