Question

The experimental curve obtained when the rate of a reaction is plotted against time, appeared parallel to the time axis some time after the reaction started. This indicates that :

• A. the reaction has stopped
• B. the equilibrium is established
• C. the concentration of the reactants is negligible
• D. the reaction is complex

Answer 1

Answer: (B)

the equilibrium is established

The curve for the rate of reaction against time is parallel to the time axis after some time implies that the rate of reaction remains constant. The concentration of reactants and products do not change with time at the equilibrium. Thus, an equilibrium is established..