1. Unsaturated fats are liquids at room temperature.
Most vegetable oils are rich in unsaturated fatty acids, including rapeseed, corn and olive oils. Palm oils are a little less unsaturated and those of coconut and palm kernel are significantly more saturated. Fatty bodies rich in unsaturated fatty acids tend to remain in the liquid state at room temperature. The cis unsaturated fatty acids of the omega-3, omega-6 and omega-9 series include several essential fatty acids. For example, linoleic acid, linolenic acid and arachidonic acid are essential fatty acids in humans.
2. Unsaturated fats they have at least one double carbon-to-carbon bond.
An unsaturated fatty acid is a fatty acid that has one or more carbon-carbon double bonds. (as opposed to saturated fatty acids that have no C = C bond).
It is called monounsaturated fatty acid when there is only one double bond, and polyunsaturated fatty acid when there are several.