Q27 / 180 · KCET 2017 · Chemistry
Which of the following statement is in accordance with the Arrhenius equation?
- Correct answerARate of a reaction increases with increase in temperature
- BRate of a reaction increases with decrease in activation energy
- CRate constant decreases exponentially with increase in temperature
- DRate of reaction does not change with increase in activation energy
Solution
According to Arrhenius equation
\[ k=A e^{\frac{-E_{s}}{R T}} \rightarrow(1) \]
Taking log of Eq. (1), we get
\[ \ln k=\ln A-\frac{E_{a}}{R} \times \frac{1}{T} \]
It is clear from the above equation that by increasing the temperature and by decreasing activation energy, the rate of
reaction will increase.
\[ k=A e^{\frac{-E_{s}}{R T}} \rightarrow(1) \]
Taking log of Eq. (1), we get
\[ \ln k=\ln A-\frac{E_{a}}{R} \times \frac{1}{T} \]
It is clear from the above equation that by increasing the temperature and by decreasing activation energy, the rate of
reaction will increase.
Hence, the correct answer is option: 'A'.