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19. The molecules of a given mass of a gas have a m.s. velocity of 200 m/sec at

27°C and 1.0×105 N/m2 pressure. When the temperature is 127°C and pressure is 0.5×105 N/m2  , the r.m.s. velocity in  m/sec will be

(a)  (100√2)/3                                         (b) (100√2)

(c)  400/ √3                                            (d)  None of the above

Answer-c

(3)

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