A vessel of volume V contains a mixture of 1 mole of hydrogen and 1 mole of oxygen (both considered as ideal). Let denotes the fraction of molecules with speed between v and (v + dv) with , similarly for oxygen. Then,
(a) obeys the Maxwell’s distribution law
(b) will obey the Maxwell’s distribution law separately
(c) neither will obey Maxwell’s distribution law
(d) will be the same
The correct answer is the option (b)
F1(v): speed of n molecules = (v+dv)
The number of molecules remains the same, which is one mole for . since the molecules differ in mass, they will also differ in speed, and hence both gases will separately obey Maxwell’s distribution.