Chemical equilibrium is always attained in an open system.
False
Chemical equilibrium is the state in which both reactants and products are present in concentrations which have no further tendency to change with time. It is attained in a closed system. A closed system is the one in which nothing new is added to a system and nothing is removed from a system. This means concentration will not change with time and system will remain in equilibrium. Example of a closed system is a gas cylinder used at home.