Chemical reaction is at equilibrium when .A, chemical reaction is at equilibrium when there is no reverse reaction possible, only a forward reaction. B. the rate of the forward reaction equals the rate of the reverse reaction. C. the reaction occurs quickly. D. there are equal amounts of products and reactants

B. the rate of the forward reaction equals the rate of the reverse reaction.

Explanation:

Equilibrium -

In a chemical reaction , a point or stage is reached , where the rate of forward reaction , becomes equal to the rate of reverse reaction , is referred to as the stage of equilibrium .

In this very stage the concentration on the reactant as well as product side remains constant .

Hence , from the given information of the question ,

The correct option is b.