What are the different methods of increasing the number of molecular collisions per second in a gas?

Explanation

The increasing order of energies of molecular orbitals of `N_2` and `O_2` are given as below:
For `N_(2): sigma1s^(2) lt sigma^(**)1s^(2) lt sigma2s^(2) lt sigma^(**)2s^(2) lt (pi 2p_(x)^(2)= pi2p_(y)^(2)) lt sigma2p_(z)^(2) lt (pi^(**)2p_(x)^(0)= pi^(**)2p_(y)^(0)) lt sigma^(**)2p_(z)^(0)`
For `O_(2): sigma1s^(2) lt sigma^(**)1s^(2) lt sigma2s^(2) lt sigma^(**)2s^(2) lt sigma2p_(z)^(2) lt (pi 2p_(x)^(2)= pi2p_(y)^(2)) lt (pi^(**)2p_(x)^(1) = pi^(**)2p_(y)^(1) lt sigma^(**)2p_(z)^(0)`