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

(8)