Equilibria involving physical and chemical changes are dynamic in nature-why?

Explanation

In a system, if two processes occur simultaneously at the samme rate, then the system is said to be in a state of dynamic equilibrium. When a chemical reaction remains at equilibrium, the forward and the backward reactions take place simultaneously at the same rate. due to this the equilibrium established in a chemical reaction is regarded as a dynamic equilibrium. similarly, when a physical process remains at equilibrium, the two opposite processesses occur simultaneously at the same rate. for the reason, a physical equilibrium is also dynamic in nature. for example, at equilibrium established during the evaporation of a liquid in a closed container, the evoporation of the liquid and the condensation of its vapour take place simultaneously at the same rate.