Which of the following quantities is/are zero at critical point?

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Compressibility factor (Z)

Molar Heat capacity

Surface Tension

${ΔH}_{vaporization}$

answer is C, D.

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Detailed Solution

Surface tension of a liquid is zero at critical point. The surface tension of a liquid decreases with increase of temperature and becomes zero at its critical temperature (where the surface of separation between liquid and its vapour dispapears)

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