# Consider a Mixture of Oxygen and Hydrogen Kept at Room Temperature. as Compared to a Hydrogen Molecule an Oxygen Molecule Hits the Wall - Physics

MCQ

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

#### Options

• with greater average speed

• with smaller average speed

• with greater average kinetic energy

• with smaller average kinetic energy

#### Solution

with smaller average speed

The average speed of molecules is given by $\sqrt{\frac{8kT}{\pi m}}$ .

We observe that greater the mass, lesser is the average speed of the molecule. Since an oxygen molecule is heavier than a hydrogen molecule, the oxygen molecule will hit the wall with smaller average speed.

Is there an error in this question or solution?

#### APPEARS IN

HC Verma Class 11, Class 12 Concepts of Physics Vol. 2
Chapter 2 Kinetic Theory of Gases
MCQ | Q 2 | Page 34