1. What is absolute zero temp. On the basis of kinetic theory of gases
  2. For a certain apparatus, the diffusion rate of hydrogen has an average value of 28.7 cm 3 s-1while that of another gas is 7.2 cm 3 s-1. identify the gas

1. Absolute temperature may be define as that temperature at which the root mean square velocity of the gas molecules reduces to zero. 

2. 

So, the other gas is oxygen. 

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