helium atom is two times heavier than a hydrogen molecule

Helium atom is two times heavier than a hydrogen molecule. At $$298 K,$$ the average kinetic energy of a helium atom is

A. two times that of a hydrogen molecule.

B. same as that of a hydrogen molecule.

C. four times that of a hydrogen molecule.

D. half that of a hydrogen molecule.

Answer : same as that of a hydrogen molecule.

Solution :
Average kinetic energy depends only on temperature and does not depend upon the nature of the gas.
$$\left( {\because \,K.E. = \frac{3}{2}KT} \right)$$

Releted MCQ Question on
Physical Chemistry >> States of Matter Solid, Liquid and Gas

Releted Question 1

Equal weights of methane and oxygen are mixed in an empty container at $${25^ \circ }C.$$ The fraction of the total pressure exerted by oxygen is

A. $$\frac{1}{3}$$

B. $$\frac{1}{2}$$

C. $$\frac{2}{3}$$

D. $$\frac{1}{3} \times \frac{{273}}{{298}}$$

View Answer

Releted Question 2

The temperature at which a real gas obeys the ideal gas laws over a wide range of pressure is

A. Critical temperature

B. Boyle temperature

C. Inversion temperature

D. Reduced temperature

View Answer

Releted Question 3

The ratio of root mean square velocity to average velocity of a gas molecule at a particular temperature is

A. 1.086 : 1

B. 1 : 1.086

C. 2 : 1.086

D. 1.086 : 2

View Answer

Releted Question 4