In most cases, for a rise of 10K temperature the rate constant is doubled to tripled. This is due to the reason that (a)collision frequency increases by a factor of 2 to 3. (b)fraction of molecules possessing threshold energy increases by a factor of 2 to 3 (c)Activation energy is lowered by a factor of 2 to 3. (d)none of these

In most cases, for a rise of 10K temperature the rate constant is doubled to tripled. This is due to the reason that fraction of molecules possessing threshold energy increases by a factor of 2 to 3. For a 10K rise in temperature, collision frequency increases merely by 1 to 2% but the number of effective collisions increases by 100 to 200%.