Which one of the following is true about the effect of increase in temperature on the distribution of molecular speeds in a gas? 

Options

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

Explanation

Area under curve = no. of molecules and remains same
The graph becomes broader as average KE `uarr`
`U_(mp) uarr` but fraction corresponding to it `darr`.