Why does the rate of a reaction increase with rise in temperature?

According to collision theory of chemical reactions, rate of a reaction depends upon collision frequency and fraction of effective collisions. The rate of a reaction generally increases with rise in temperature mainly because of increase in number of effective collisions. Arrhenius proposed a quantitative relation between rate constant and temperature as k= Ae^(-E_a//Rt) where E_a is activation energy. It is equal to the difference between threshold energy and average kinetic energy of reacting molecules. Which of the following plot will be linear ?

Why rate of evaporation increases with the increase in temperature.

Why does conductivity of a semiconductor increase with rise in temperature?

Why does the rate of photosynthesis decrease at higher temperatures?

Why does physisorption decrease with increase in temperature ? Explain.

The rate of a reaction increases four times when the temperature changes from 300 K to 320 K. Calculate the energy of activation of the reaction assuming that it does not change with temperature (R = 8.314 JK^-1 mol^-1) .

Why surface tension decreases with increase in temperature ?

Write the mathematical relation for the resistivity of a material in terms of relaxation time, number density, mass and charge carries in it. Explain using this relation, why the resistivity of a metal increases and that of semiconductor decreases with rise in temperature.