Which statement describes both homogeneous mixtures and heterogeneous mixtures?
a. their components can distinguish visually
b. their components are combined in a fixed ratio
c. their components can be separated by a physical process
d. they always contain a liquid component
e. they are considered to be pure substances

C

Explanation:

Mixtures can be separated physically, while compounds cannot.

For example if we have mixture of water and alcohol ethanol, we can separate water and ethanol with distillation (process of heating and cooling). Ethanol and water have different boiling points (physical property).

But if we want to separate water (compound) into oxygen and hydrogen, we must break bonds between oxygen and hydrogen and that is not physical property.