The number of collisions depend upon

The Arrhenius plots of two reactions,$I$ and $II$ are shown graphically. The graph suggests that

Which of the following statements is correct?

The rate of a reaction doubles,when the temperature is changed from $300 \ K$ to $310 \ K$. Activation energy of the reaction is....... $(R=8.314 \ J \ K^{-1} \ mol^{-1}, \log 2=0.301)$

Explain the effect of an increase in temperature on the rate of reaction and the rate constant.

The activation energy for a reaction at the temperature $T \ K$ was found to be $2.303 \ RT \ J \ mol^{-1}$. The ratio of the rate constant to the Arrhenius factor is