jee_main_2026_28_january_evening - Chemical Kinetics Topics

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QUESTION #72 Arrhenius Equation And Activation Energy
A arrow B (first reaction) C arrow D (second reaction) Consider the above two first-order reactions. The rate constant for first reaction at 500 K is double of the same at 300 K. At 500 K, 50% of the reaction becomes complete in 2 hour. The activation energy of the second reaction is half of that of first reaction. If the rate constant at 500 K of the second reaction becomes double of the rate constant of first reaction at the same temperature; then rate constant for the second reaction at 300 K is ____ × 10⁻¹ hour⁻¹ (nearest integer).
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