Are lipids polar molecules? Are they soluble in water?
Lipids are not polar molecules, and they are not soluble in water.
Lipids are a group of molecules that includes fats, fatty acids, sterols, and phospholipids.
Some examples are shown below.
Although they have polar functional groups at one end, the hydrocarbon parts of the molecules are so large that the molecules are hydrophobic.
Lipids are effectively nonpolar and insoluble in water.