question_answer

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?     AIEEE  Solved  Paper-2005

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

Correct Answer: C

Solution :

Distribution of molecules (N) with velocity (u) at two temperatures andis shown in the given figure At both temperatures, distribution of molecules with increase in velocity first increases, reaches a maximum value and then decreases.