Question

The molecular weights of oxygen and hydrogen are 32 and 2 respectively. The root mean square velocities of oxygen and hydrogen at N.T.P. are in the ratio ______

Options

• 4 : 1

• 1 : 16

• 16 : 1

• 1 : 4

Answer 1

The molecular weights of oxygen and hydrogen are 32 and 2 respectively. The root means square velocities of oxygen and hydrogen at N.T.P. are in the ratio 1 : 4.

Explanation:

`("v"_("o"_2))/("v"_("H"_2)) = sqrt(("M"_0)_2/(("M"_0)_1)) = sqrt(2/32) = 1/4`