Points I, II and III in the following plot respectively correspond to (`V_(mp)`: most probable velocity)

Options

A. `V_("mp")" of "N_(2)(300K),V_("mp")" of "H_(2)(300K),V_("mp")" of "O_(2)(400K)`
B. `V_("mp")" of "H_(2)(300K),V_("mp")" of "N_(2)(300K),V_("mp")" of "O_(2)(400K)`
C. `V_("mp")" of "O_(2)(300K),V_("mp")" of "N_(2)(300K),V_("mp")" of "H_(2)(400K)`
D. `V_("mp")" of "N_(2)(300K),V_("mp")" of "O_(2)(300K),V_("mp")" of "H_(2)(400K)`

Answer

D

Explanation

`V_(mp)=sqrt((2RT)/(M))rArr V_(mp) prop sqrt((T)/(M))`
For `N_(2),O_(2) and H_(2)`
`sqrt((300)/(28))lt sqrt((400)/(32)) lt sqrt((300)/(2))`
`therefore" "V_(mp)" of "N_(2)(300K)ltV_(mp)" of "O_(2)(400K)ltV_(mp)" of "H_(2)(300K)`