Three vessels of equal capacity have gases at the same temperature and pressure. The first vessel contains helium (monoatomic), the second contains fluorine (diatomic) and the third contains sulfur hexafluoride (polyatomic). The correct statement, among the following is :

Question

The root mean square speed of sulfur hexafluoride is the largest

All vessels contain unequal number of respective molecules

The root mean square speed of molecules is same in all three cases

The root mean square speed of helium is the largest

Solution

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