The `rms` velocity molecules of a gas of density `4 kg m^(-3)` and pressure `1.2 xx 10^(5) N m^(-2)` is

Options

A. `300 ms^(-1)`
B. `900 ms^(-1)`
C. `120 ms^(-1)`
D. `600 ms^(-1)`

Answer

A

Explanation

`V_("rms") = sqrt((3P)/(d)) = sqrt((3 xx 1.2 xx 10^(5))/(4))`
`= sqrt(9 xx 10^(4)) = 300 ms^(-1)`