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52.

If VH, VN  and VO denote the root-mean square velocities of molecules of hydrogen, nitrogen and oxygen respectively at a given temperature, then

(a)VN > VO > VH                     (b) VH  >VN > VO

(c) VO =VN =VH                      (d) VO > VH > VN

Answer-b

(2)

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