Final answer:
Unsaturated fats can be classified as monounsaturated with one double bond, or polyunsaturated with multiple double bonds, based on the number of double bonds in their hydrocarbon tail.
Step-by-step explanation:
Unsaturated fats can be either monounsaturated or polyunsaturated -unsaturated, depending on the number of double bonds in the hydrocarbon tail.
An unsaturated fat with one double bond is called a monounsaturated fat. On the other hand, an unsaturated fat that contains multiple double bonds is known as a polyunsaturated fat. Fatty acids with only single bonds between the carbon atoms in their hydrocarbon chains are considered saturated, and they have the maximum number of hydrogen atoms attached to their carbon skeleton.
In contrast, unsaturated fats have at least one pair of carbon atoms that share a double bond, which means these carbon atoms are bonded to fewer hydrogen atoms. Monounsaturated fats include substances like oleic acid, which has one double bond, whereas polyunsaturated fats include linoleic acid, which has more than one double bond.