Which one of the following statement is not true about the effect of an increase in temperature on the distribution of molecular speed?

Options

A. The area under the distribution curve remains the same as under the lower termperature
B. The distribution becomes broader
C. The fraction of the molecules with the most probable speed increases
D. The most probable speed increases

Answer

C

Explanation

Distribution of molecules (N) with velocity (u) at two temperatures `T_(1)" and "T_(2) (T_(2) gt T_(1))` is shown below: At both temperatures, distribution velocity first increases, reaches a maximum value and then decreases. Most probable speed increases with temperature increases, but fraction possessing most probable speed decreases.