State the chemical composition of the sterol that is present in high levels in most people who belong to the high-risk group.

People who are in the high-risk group contain elevated levels of cholesterol. In chemical terms, cholesterol is a fatty steroid alcohol or fatty sterol.  Since it is non-polar, its solubility in water is very minimal. The chemical formula for this sterol is C27H46O.

vanderwaal's forces of attraction are the electrostatic intermolecular forces that exist in a molecule due to the temporary or permanent dipoles that are developed in a molecule. in , the major intermolecular forces are dipole-dipole interactions as the molecule is polar (bent structure). so the vanderwaal's forces of interaction in between molecules are the permanent dipole-dipole interactions that develop due to the dipole that exists in between the polar h - s bond. the positively charged hydrogen atom is attracted towards the negative end of the dipole that is sulfur of the adjacent molecule. therefore, these forces of attraction are relatively stronger than that of london dispersion forces that exist in non polar molecules.