Question

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : The Arrhenius equation predicts that the rate constant of a reaction can be decreased by increasing the temperature or by decreasing the activation energy.
Reason (R) : Changing the temperature of a reaction mixture is easy to do, however reducing the activation energy is more challenging in a reaction.
In the light of the above statements, choose the most appropriate answer from the options given below :

• A. Both (A) and (R) are correct and (R) is the correct explanation of (A)
• B. Both (A) and (R) are correct but (R) is not the correct explanation of (A)
• C. (A) is correct but (R) is not correct
• D. (A) is not correct but (R) is correct

Hint:

When evaluating mathematical relationships like $y = e^{-x}$, remember that as $x$ (which acts as a stand-in for $E_a/T$) decreases, the overall value of $y$ increases. Thus, higher $T$ or lower $E_a$ strictly increases reaction rates.

Answer 1

The Correct Option is D