jee_main_2026_28_january_evening - Chemical Kinetics Topics

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