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15. The average kinetic energy of a gas at – 23°C and 75 cm pressure is

5×10-14 erg for H2 . The mean kinetic energy of the O2  at 227°C and 150 cm pressure will be

(a) 80×10-14 erg                                (b) 20×10-14 erg

(c) 40×10-14 erg                               (d) 10×10-14 erg

Answer-d

(11)

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