Following represents the Maxwell distribution curve for an ideal gas at two temperature `T_(1)` and `T_(2)` . Which of the following option(s) is/are true?

Options

A. Total area under the two curves is independent of moles of gas
B. `u_(m p)` decreases as temperature decreases
C. `T_(1) gt T_(2)` and hence higher the temperature, sharper the curve
D. The fraction of molecules having speed `u_(m p)` decreases as temperature increases

Answer

A, B, D

Explanation

(A) area under the curve gives fraction of molecules and total area is constant
(B) `u_(m p)` decreases with decrease in temperature
(C) `T_(2)` is higher temperature
(D) As seen from graph, `:.` A, B, D