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12 . kinetic theory of gases — Physics STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 SciencePhysics12 . kinetic theory of gases1 Mark
MCQ
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

  • A
    All are correct
  • B
    $I$ and $IV$ are correct
  • C
    $IV$ is correct
  • ✓
    None of these
✓

Answer

Correct option: D.
None of these
d
on the basis of kinetic theory of gases: Energy of one molecule is never zero, the $rms$ speed depends on the tempreture as well as the weight of the gases, for one gram of ideal gas the kinetic energy also depends on the degree of freedom and also the mean kinetic energy of one mole of a gas is $\frac{f R T}{2}$. So, none of the statement are correct.

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