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Solution


Q.

The helium and argon are put in the flask at the same room temperature (300 K). The ratio of average kinetic energies (per molecule) of helium and argon is:

(Give: Molar mass of helium = 4 g/mol, Molar mass of argon = 40 g/mol)          [2025]
1 1 : 10  
2 10 : 1  
3 1:10  
4 1 : 1  

Ans.

(4)

K.E =  f2kT

For He and Ar, f=3

KEHeKEAr=11