Which of the following statement is incorrect about activation energy?

For the reaction 2N$$_2$$O$$_5$$ $$\to$$ 4NO$$_2$$ + O$$_2$$.

If initial pressure is 100 atm and rate constant $$k$$ is 3.38 $$\times$$ 10$$^{-5}$$ s$$^{-1}$$. after 20 min the final pressure of N$$_2$$O$$_5$$ will be

Determine the specific rate constant of the reaction. If the half-life period of a first order reaction is 1402 s.

Rate constant (K) of a reaction has least value at