Root mean square velocity of a gas molecule is proprotional to

Options

A. `m^(1//2)`
B. `m^(0)`
C. `m^(-1//2)`
D. `m`

Answer

C

Explanation

Root mean square speed is given by the expression
`U_("rms")=sqrt((3RT)/(M))" "[becauseM=mN]`
`therefore" "U_("rms")propsqrt((1)/(m))`
`rArr" "u_("rms")prop(m)^(-1//2)`