25 JEE Main 2026 Chemical Kinetics previous-year questions with verified answers and step-by-step solutions.
These are the JEE Main 2026 previous-year questions from the Chemical Kinetics chapter of Chemistry. Each links to a full solution with a verified answer key. To see the whole chapter across all years, visit the Chemical Kinetics chapter hub.
At 27ⁱrc C in presence of a catalyst, activation energy of a reaction is lowered by 10 ~kJ ~mol⁻¹. The logarithm of rat…
For the thermal decomposition of reactant AB(g), the following plot is constructed. The half life of the reaction is '…
If the half life of a first order reaction is 6.93 minutes then the time required for completion of 99% of the reaction…
Decomposition of a hydrocarbon follows the equation k = (5.5 × 10¹¹ s⁻¹) e^-28000 KT. The activation energy of reaction…
Consider the reaction aX → bY, for which the rate constant at 30°C is 1 × 10⁻³ mol⁻¹ L s⁻¹. Which of the following stat…
For a first order reaction A → B t/min [A]/M 0 0.6500 x 0.0650 20 0.00065 x= ______ min. (Nearest integer)
The temperature at which the rate constants of the given below two gaseous reactions become equal is \\\\_ K. (Nearest…
Given below are two statements: R=8.314 J K⁻¹ mol⁻¹ and 1 cal =4.2 J Statement I: When Ea=12.6 kcal/mol, the room tempe…
Observe the following reactions at T(K). I. A → products. II. 5 Br⁻(aq)+BrO₃ ⁻(aq)+6 H⁺(aq) → 3 Br₂(aq)+3 H₂ O(l) Both…
Consider the following gas phase reaction being carried out in a closed vessel at 25°C. 2A(g) → 4B(g) + C(g) time (min)…
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