Chemistry · 2025
JEE Main · 7 April 2025, Shift 1 · Q56
Reaction A ( g ) → 2 B ( g )+ C ( g ) is a first order reaction. It was started with pure A Which of the following option is incorrect?
Reaction $\displaystyle \mathrm{A}(\mathrm{g}) \rightarrow 2 \mathrm{~B}(\mathrm{~g})+\mathrm{C}(\mathrm{g})$ is a first order reaction. It was started with pure A
Which of the following option is incorrect?
| t/min | Pressure of system at time t/mm Hg |
| $\displaystyle 10$ | $\displaystyle 160$ |
| $\displaystyle \infty$ | $\displaystyle 240$ |
Official answer
From NTA’s final answer key for this paper.
(3)
Rate constant of the reaction is $\displaystyle 1.693 \mathrm{~min}^{-1}$
More from Chemical Kinetics
- Pre-exponential factors of two different reactions of same order are identical. Let activation energy of first reaction exceeds the activation energy…2026
- A → B (first reaction); C → D (second reaction) Consider the above two first-order reactions. The rate constant for first reaction at 500 K is double…2026
- Correct statements regarding Arrhenius equation among the following are: A. Factor e^-E a / R T corresponds to fraction of molecules having kinetic…2026
- Consider the following statements related to temperature dependence of rate constants. Identify the correct statements. A. The Arrhenius equation…2025
- Decomposition of a hydrocarbon follows the equation k=(5.5 × 10^11 s^-1) e^((-28000 K)/T). The activation energy of reaction is ____ kJ mol^-1.…2026
- Consider the first order reaction R → P. The fraction of molecules decomposed in the given first order reaction can be expressed as2026
- t_100 % is the time required for the 100 % completion of the reaction while t_1 / 2 is the time required for 50 % of the reaction to be completed.…2026
- Reactant A converts to product D through the given mechanism (with the net evolution of heat): A → B, slow; Δ H=+ ve; B → C, fast; Δ H=-ve; C → D,…2025
JEE Main 2025 Chemistry question, with the answer from NTA’s final answer key. Where our answers come from.