JEE Main · 2026 · 04 Apr 2026 · Shift 1 · Chemical Kinetics

Pre-exponential factors of two different reactions of same order are identical. Let activation energy of first reaction exceeds the activation energy of second reaction by $20\mathrm{kJ}{\mathrm{mol}}^{-1}$. If ${\mathrm{k}}_1$ and ${\mathrm{k}}_2$ are the rate constants of fir …

A → products (First order reaction).

Three sets of experiment were performed for a reaction under similar experimental conditions.
Run $1\Rightarrow 100\mathrm{mL}$ of 10 M solution of reactant A
Run $2\Rightarrow 200\mathrm{mL}$ of 10 M solution of reactant A
Run …

The temperature at which the rate constants of the given below two gaseous reactions become equal is
____ K. (Nearest integer).
$\mathrm{X}⟶\mathrm{Y}{\mathrm{k}}_1=10^6{\mathrm{e}}^{\frac{-30000}{\mathrm{T}}}$ …

Decomposition of A is a first order reaction at $\mathrm{T}(\mathrm{K})$ and is given by $\mathrm{A}(\mathrm{g})\to \mathrm{B}(\mathrm{g})+\mathrm{C}(\mathrm{g})$. In a closed 1 L vessel, 1 bar $\mathrm{A}(\mathrm{g})$ is allowed to decompose at $\mathrm{T}(\mathrm{K})$. …

Correct statements regarding Arrhenius equation among the following are :
(A) Factor $e^{-\mathrm{Ea}/\mathrm{RT}}$ corresponds to fraction of molecules having kinetic energy less than Ea.
(B) At a given temperature, lower the Ea, faster is the reaction.
(C) Increase in tempe …

Consider $\mathrm{A}\stackrel{k_1}{\to }\mathrm{B}$ and $\mathrm{C}\stackrel{k_2}{\to }\mathrm{D}$ are two reactions. If the rate constant $(k_1)$ of the $\mathrm{A}\to \mathrm{B}$ reaction can be expressed by the following equation …