On the basis of the kinetic theory of gases,the mean kinetic energy $(K.E.)$ of $1\, mole$ per degree of freedom is:

  • A
    $\frac{1}{2}RT$
  • B
    $\frac{3}{2}RT$
  • C
    $\frac{1}{2}kT$
  • D
    $\frac{3}{2}kT$

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