When is chemical equilibrium attained in a reversible reaction?

Here, the correct answer is -Concentration of the products remains constant. Other options do not give a favor to attain a chemical equilibrium.

Chemical equilibrium is a type of chemical reaction in which the concentration of both reactants and products doesn't change and remains constant at the equilibrium state. Hence, there will not be any possibility of observable change in the properties of the system.

There are some other characteristics of a chemical equilibrium:

• It takes place only in a closed container or closed system.
• You can attain equilibrium either from the reactants or the products side.
• A catalyst doesn't have any kind of effect on it.
• Chemical equilibrium is dynamic in nature.