Question

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

• A. $SO_2$
• B. $CO_2$
• C. $O_2$
• D. $H_2$

Answer 1

Answer: (D)

$H_2$

Answer 2

$u = \sqrt{\frac{3RT}{M}}$ At constant T , $\mu \propto \sqrt{\frac{I}{M}}$ Since $H_2$ has the lowest molecular mass, p will be maximum for $H_2$