Q. Which one of the following statements is not true about the effect of an increase in temperature on the distribution of molecular speeds in a gas?
A) The area under the distribution curve remains the same as under the lower temperature
B) The distribution becomes broader
C) The fraction of the molecules with the most probable speed increases
D) The most probable speed increases
Explanation
(c)
Distribution of molecules $(N)$ with velocity $(u)$ at two temperatures $T_{1}\ and\ T_{2}\left( T_{2} > T_{1} \right)$ is shown below
[image:5_image30.emf]
At both temperatures, distribution of molecules with increase in velocity first increases, reaches a maximum value and then decreases.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.