68. The gas having average speed four times as that of
SO2 (molecular mass 64) is
(a) He (molecular mass 4) (b) O2 (molecular mass 32)
(c) H2 (molecular mass 2) (d) CH4 (molecular mass 16)
Answer-a
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a