For a chemical reaction A B , the variation of the rate of reaction with the concentration of reactant A is plotted as shown in the given graph. Based on this plot, what is the order of the reaction?

Step-by-step solution

The rate law for a general reaction A B is given by: Rate = k[A]^n where n is the order of the reaction. From the given graph, the rate of reaction is a horizontal straight line, which indicates that the rate is constant and independent of the concentration of reactant A . This means: Rate = k[A]^0 = k Therefore, the reaction is of zero order. Answer: Zero order