Please give more information and I’ll try to help the best I can.
To segregate means to split. To separate, to spread apart.
Your answer: Separate.
First, the definition of aqueous is watery or water like. So anything that is used to describe something that is kind of like water or liquid may be referred to as aqueous. A sentence with the word aqueous could be, "When we did our chemistry assignment the other day, we realized that when we pour a certain chemical on one of the crystal rocks that we picked up, the crystal rocks turned into some aqueous substance probably due to some kind of chemical reaction.
