# Consider a mixture of oxygen and hydrogen kept at room temperature . As compared to a hydrogen molecule , an oxygen molecule hits the wall

(a) with greater average speed
(b) with smaller average speed
(c) with greater average kinetic energy
(d) with smaller average kinetic energy

Answer : with smaller average speed
Explanation :
$V_{av} = \sqrt{\large\frac{8RT}{\pi M}}$
$M_{O_{2}} > M_{H_{2}}$