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(D) For a liquid that does not wet the surface (like mercury), the meniscus is convex upwards.According to the Young-Laplace equation, the pressure di

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more than the atmospheric pressure

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(D) For a liquid that does not wet the surface (like mercury), the meniscus is convex upwards.According to the Young-Laplace equation, the pressure difference across a curved surface is given by $\Delta P = P_{out} - P_{in} = \frac{2T}{R}$.For a convex meniscus, the pressure just below the meniscus $(P_{in})$ is greater than the pressure just above it $(P_{out})$.Since the pressure just above the meniscus is the atmospheric pressure $(P_0)$, the pressure just below the meniscus is $P_{in} = P_0 + \frac{2T}{R}$.Therefore, the pressure just below the meniscus is more than the atmospheric pressure, which causes the mercury level to be depressed in the capillary tube.

When a capillary tube is dipped into a tub containing mercury, the mercury level in the capillary goes down because the pressure just below the meniscus is

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