Match the items given in List-I with items given in List-II List-I Li…

The correct answer is Option (1) → (A)-(II), (B)-(III), (C)-(IV), (D)-(I)

List-I	List-II
(A) Mathematical expression for the rate of reaction is	(II) rate law
(B) The rate of reaction for zero order reaction is equal to	(III) rate constant
(C) The unit of rate constant for zero order reaction is the same as that of	(IV) rate of a reaction
(D) The rate of a complex reaction is determined by	(I) rate of slowest step

(A) Mathematical expression for the rate of reaction is $\rightarrow$ (II) rate law: The rate law equation (or rate expression) is the mathematical relationship that links the reaction rate to the concentrations of the reactants. For example, $\text{Rate} = k[\text{A}]^x[\text{B}]^y$.

(B) The rate of reaction for zero order reaction is equal to $\rightarrow$ (III) rate constant: For a zero-order reaction, the rate law is $\text{Rate} = k[\text{Reactant}]^0$. Since $[\text{Reactant}]^0 = 1$, the rate equation simplifies to $\text{Rate} = k$. Thus, the rate of the reaction is equal to the rate constant ($k$).

(C) The unit of rate constant for zero order reaction is the same as that of $\rightarrow$ (IV) rate of a reaction: As established above, $\text{Rate} = k$ for a zero-order reaction. Since the rate of a reaction is measured in concentration per time (e.g., $\text{mol } \text{L}^{-1} \text{ s}^{-1}$), the unit of the rate constant ($k$) for a zero-order reaction must also be the same as the unit of the rate of a reaction.

(D) The rate of a complex reaction is determined by $\rightarrow$ (I) rate of slowest step: A complex reaction occurs in multiple steps (a mechanism). The overall rate of such a reaction is controlled by the rate of the slowest step in the reaction mechanism, which is called the Rate Determining Step (RDS).