Answer:
See explanation
Step-by-step explanation:
For the equilibrium; A + B ⇄C + D
At time = 0 secs, the concentration of products is zero while the concentration of reactants decreases steadily.
As time goes on, the concentration of the reactants continues to decrease while the concentration of products increases.
At equilibrium the concentration of both reactants and products are now the same because the rate of forward reaction is equal to the rate of reverse reaction are now the same.