What happens in a reaction if it is at chemical equilibrium?

The amount of the reactant is constantly decreasing.

The ratio of the products to reactants remains constant over time.

All of the products are used up.

There are no reactants in the system.

the correct answer is:

a. formation of precipitation

water and alcohols have similar properties because water molecules contain hydroxyl groups that can form hydrogen bonds with other water molecules and with alcohol molecules, and likewise alcohol molecules can form hydrogen bonds with other alcohol molecules as well as with water.