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The average translational energy and the...

The average translational energy and the rms speed of molecules in a sample of oxygen gas at 300 K are `6.21xx10^(-21)`J and 484 m/s , respectively. The corresponding values at 600 K are nearly: (Assuming ideal gas behaviour)

A

`12.42 xx 10^(-21)` J, 968 m/s

B

`8.78 xx 10^(-21)` J, 684 m/s

C

`6.21 xx 10^(-21)` J, 968 m/s

D

`12.42 xx 10^(-21)` J, 684 m/s

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The correct Answer is:
D
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