Statement I: Critical temperature is the temperature at which the intermolecular attraction in gas molecules vanishes. Statement II: At critical point, the density of substance in gaseous and liquid s

Question

Statement I: Critical temperature is the temperature at which the intermolecular attraction in gas molecules vanishes. Statement II: At critical point, the density of substance in gaseous and liquid states becomes same.

Prashant Kotian · Accepted Answer

Correct answer: D. Intermolecular attractions do not vanish at the critical temperature; rather, the thermal kinetic energy of the molecules becomes too high for those attractions to condense the gas into a distinct liquid phase (Statement I is incorrect). Statement II is correct because the boundary between liquid and gas disappears at the critical point, making their densities equal.

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