Answer:
The correct answer is F2 gas at 15 degree C.
Step-by-step explanation:
On the basis of the kinetic theory of gases, all the gases at a specific temperature possess the same average kinetic energy. The average kinetic energy of the gases can be determined with the help of the relation, K = 3R / 2NA * T
Here, K is the average kinetic energy,
R is the gas constant and NA is the Avogadro's number (6.023 * 10^23 atoms /mol)
T is the temperature in Kelvin
It is evident from the relation that K relies upon the temperature. Thus, F2 gas at 15 degree C exhibits the lowest average kinetic energy as it is at the lower temperature in comparison to the other gases.