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KCET2020ChemistryChemical Kinetics

The rate constant of a reaction is given by k=P Z e^ -E_ a / R T under standard notation. In order to speed up the reaction, which of the following factors has to be decreased?

Options

  1. AZ
  2. BBoth Z and T
  3. CE_ a
  4. DT

Correct answer

C. E_ a

Step-by-step solution

k=P Z e^ -E a / R T The above reaction expression is given in terms of exponents. We have to increase the speed of reaction. So, value of k has to be more and as per the given expression. k 1 e^ E_ a / R T if E a decreases, than [e^ E_ a / R T ] also decreases and [e^ 1 E_ a / R T ] increases. k also increases

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