Final answer:
To identify whether each compound is a straight chain, branched chain, or cycloalkane, we need to examine their structures.
Step-by-step explanation:
When determining whether a compound is a straight chain, branched chain, or cycloalkane, we look at the structure of the carbon atoms.
A straight chain compound has a continuous chain of carbon atoms without any side branches. Examples of straight chain compounds include pentane and hexane.
A branched chain compound has carbon atoms that are connected in a way that forms side branches. Examples of branched chain compounds include 2-methylpentane and 2,2-dimethylbutane.
A cycloalkane is a compound in which the carbon atoms form a closed ring. Examples of cycloalkanes include cyclohexane and cyclopentane.
Therefore, to identify whether each compound is a straight chain, branched chain, or cycloalkane, we need to examine their structures.