Substances that do not dissolve are insolubles, because they are not soluble they do not dissolve.
insoluble
heterogeneous mixture
Giant covalent substances like diamond tend not to dissolve in anything. Non polar molecular substances such as hydrocarbons are not attracted to water.
It depends on the physical properties of the substance. Sometimes heating a hydrophobic substance can increase solubility. Also, heating may cause the substance to denature and dissolve. In the case of proteins, proteins can contain many hydrophobic parts but still be soluble in water. However, hydrophobic substances do not typically dissolve in water, due to the polar nature of water. Typically, scientists use the word "hydrophobic" only to describe substances that have a negligible solubility in water. You may have meant to ask "why do hydrophilic substances dissolve in water".
Water is a universal solvent.
No. Some substances dissolve perfectly and are called homogeneous. Others do not and are called Heterogeneous.
They are called solutes
insoluble
Solvent
solvent
Insoluble substances do not dissolve.
Things that do not dissolve are called insoluble.
I'm not sure what your asking but the term for substances that are unable to dissolve in water are called unsoluable.
Substances that can be dissolved are called "solutes". Solutes dissolve in substances called "solvents". For example if you add salt into water, salt is the solute and water is the solvent.
Because a lot of substances can dissolve into mix into or in some cases dissolve from water
The chemistry principal of "like dissolves like," explains that polar substances will dissolve in each other. Similarly, a covalent will dissolve another covalent.
Substances that do not dissolve in water are called "insoluble" or "non-soluble." For water (a polar molecule), anything non-polar will not dissolve, including hexane, methane, ethane, propane, octane, oils, waxes, and plastics.