Organic compounds contain carbon atoms bonded to other atoms.
Explanation:
The organic compounds have as a fundamental element carbon, an element which is tetravalent because it has four covalent bonds. Carbon can form chains of variable length, thanks to that. You can also find hydrogen in those chains that's why we can say that the organic compounds are formed by hydrocarbon chains (carbon and hydrogen)
Lipids don't dissolve in water because of the different polarities. Water is polar and lipids are not polar which is why they don't dissolve. What this means is that they don't bond and don't share electrons and therefore don't mix.