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

Choose the correct answer from the options given below:

(A)-(II), (B)-(III), (C)-(IV), (D)-(I)

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

(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).