Question

Which of the following has maximum root mean square velocity at the same temperature.

• A. $\mathrm { SO } _ { 2 }$
• B. $\mathrm { CO } _ { 2 }$
• C. $O _ { 2 }$
• D.

Answer 1

Answer: (D)

Answer 2

$V _ { r m s } = \sqrt { \frac { 3 R T } { M } } \therefore V _ { r m s } \propto \frac { 1 } { \sqrt { M } }$ at same T

because has least molecular weight so its r.m.s. velocity should be maximum.