Ncert Exercises & Solutions

The correct statements among the following regarding the Arrhenius equation is/are -

(a)	Rate of a reaction increases with an increase in temperature
(b)	Rate of a reaction increases with a decrease in activation energy
(c)	Rate constant decreases exponentially with an increase in temperature
(d)	Rate of reaction decreases with a decrease in activation energy

1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)

Hint: Rate of a reaction increases with an increase in temperature

Arrhenius equation can be written as $k = A \cdot e^{\frac{- E_{A}}{R T}}$

$k \propto e^{- E_{G}}$ ie., the rate of reaction increases with a decrease in activation energy.

$k \propto e^{- \frac{1}{T}}$

$k \propto e^{T}$ ie., the rate of reaction increases with an increase in temperature.

Hence, option 1 is the correct answer.