There are equal volumes of `N_2` and `CO_2` gases at `25^@C` and 1 atm. Then indicate the correct statements among the following 

Options

A. The rms velocity remains the same for `N_2` and `CO_2` gases
B. The average translational K.E per molecule is the same for `N_2` and `CO_2`
C. The density of `N_2` is less than that of `CO_2`
D. The total translational K.E of both `N_2` and `CO_2` is the same

Explanation

Equal volumes, P, T = same n
average `KE = 3/2 KT , d alpha M`
Total KE = `3/2 nRT`.