Final answer:
Lipids known as oils generally have a high degree of unsaturated bonds due to the presence of carbon-carbon double bonds in their fatty acid chains, resulting in their liquid state at room temperature.
Step-by-step explanation:
In general, the lipids that we refer to as oils have a high degree of unsaturated bonds. Oils consist mostly of triglycerides with long fatty acid chains that include one or more carbon-carbon double bonds. Due to the presence of these unsaturated bonds, the molecules in oils have kinks or bends, preventing them from packing tightly together. This loose packing results in weaker intermolecular forces and lower melting points, which is why oils are typically liquid at room temperature.