COMEDK 2023 Shift 1 Paper

To match the details in Column I with those in Column II, we need to thoroughly understand the chemical concepts described in each statement. Let's evaluate each description:
Column I: A - For complex reactions order is determined by
For complex reactions, the order isn't apparent directly from the stoichiometry and is often determined experimentally from the rate law's dependence on concentration. In particular, for complex reactions involving multiple steps, the rate is determined by the slowest, or rate-determining, step. Thus, A matches with R (Slowest rate determining step).
Column I: B - For Zero order reaction unit of k is same as that of
In zero order reactions, the rate of reaction (Rate =k[A]0) is constant. The unit for rate constant k is concentration/time, for example, mol‌/‌L* s. This matches with P (Rate of reaction), since both involve concentration per time.
Column I: C - Mathematical expression which gives relationship between rate of reaction and concentrations of reactants is called
This mathematical expression is defined as the rate law, which expresses the rate of a reaction in terms of the concentration of reactants. Therefore, C matches with S (Rate law).
Column I: D - For a first order reaction plot of log[R0]‌/[R] vs time gives
For a first-order reaction, plotting log[R0]‌/[R] versus time indeed produces a straight line whose slope is −k/2.303, where k is the rate constant. Thus, D matches with Q( Slope =k/2.303)
From our analysis, the correct match is:
A=R‌‌B=P‌‌C=S‌‌D=Q
Therefore, the correct option is Option C.