Two reactions


Two reactions $\mathrm{R}_{1}$ and $\mathrm{R}_{2}$ have identical pre-exponential factors. Activation energy of $\mathrm{R}_{1}$ exceeds that of $R_{2}$ by $10 \mathrm{~kJ} \mathrm{~mol}^{-1}$. If $\mathrm{k}_{1}$ and $\mathrm{k}_{2}$ are rate constants for reactions $\mathrm{R}_{1}$ and $\mathrm{R}_{2}$ respectively at $300 \mathrm{~K}$, then $\ln \left(\mathrm{k}_{2} / \mathrm{k}_{1}\right)$ is equal to :-

 $\left(\mathrm{R}=8.314 \mathrm{~J} \mathrm{~mol}^{-1} \mathrm{~K}^{-1}\right)$

  1. 8

  2. 12

  3. 6

  4. 4

Correct Option: , 4


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