# The average translational kinetic energy of O2 (molar mass 32) molecules at a particular temperature is…

Q: The average translational kinetic energy of O2 (molar mass 32) molecules at a particular temperature is 0.048 eV. The translational kinetic energy of N2 (molar mass 28) molecules in eV at the same temperature is

(a) 0.0015

(b) 0.003

(c) 0.048

(d) 0.768

Ans: (c)

Sol: The average Translational $\large K.E = \frac{3}{2}kT$ depends on temperature only .  Here temperature is same , hence  translational kinetic energy  will be same .