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MHT CET202616 April 2026Evening ShiftChemistryChemical KineticsActual

The equation for the rate constant is k = Ae^ -E_a/RT . A chemical reaction will proceed more rapidly if there is a decrease in

Options

  1. Ak
  2. BA
  3. CE_a
  4. DT

Correct answer

C. E_a

Step-by-step solution

The rate of a chemical reaction is directly proportional to the rate constant k . According to the Arrhenius equation, k = Ae^ -E_a/RT . For the reaction to proceed more rapidly, the rate constant k must increase. A decrease in the activation energy E_a makes the exponent -E_a/RT less negative, which increases the value of e^ -E_a/RT . Therefore, a decrease in E_a leads to an increase in k , making the reaction proceed more rapidly.

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