Read the given statements and decide which is/are correct on the basis of kinetic theory of gases

(I) Energy of one molecule at absolute temperature is zero

(II) r.m.s. speeds of different gases are same at same temperature

(III) For one gram of all ideal gas kinetic energy is same at same temperature

(IV) For one mole of all ideal gases mean kinetic energy is same at same temperature

1. All are correct

2. I and IV are correct

3. IV is correct

4. None of these

4. Mean kinetic energy of any ideal gas is given by $\mathrm{E}=\frac{\mathrm{f}}{2}\mathrm{T}$ which is different for different gases. (f is not same for all gases)

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