Question

The rate constant of a certain reaction is given by $k=A{e}^{-E_a/RT}$ (where $A=$ Arrhenius constant). Which factor should be lowered so that the rate of reaction may increase?

• A. $T$
• B. $Z$
• C. $A$
• D. $E_a$

Answer 1

The correct option is D $E_a$

$k=A{e}^{\frac{-Ea}{RT}}$

we know that the rate of a reaction $\propto$ reate constant (k)

and $k\propto \frac{1}{E_a}$ from the Arhenius equation.

$\therefore$ lowering $E_a$ will increase $k$ (rate) and so the rate of reaction.
Hence option D is the correct answer.