Chemistry - Ideal Gas Question with Solution | TestHub

For a fixed gas, raising T flattens the Maxwell-Boltzmann curve and shifts the peak to higher speeds: graph (b) (T₃ < T₄, T₄ curve lower and right-shifted) is correct; graph (a), with the labels interchanged, is wrong. At fixed T the heavier gas gives the sharper, left-shifted peak: in graph (c) (M₃ < M₄) the heavier M₄ is drawn broader and right-shifted, which is wrong; in graph (d) (M₄ < M₃) the lighter M₄ is correctly drawn broader and right-shifted. Hence (b) and (d).