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4 August, 23:16

If a small-diameter open glass tube is partially immersed in a vessel containing mercury, the surface of the mercury inside the tube will be A. lower than the mercury in the vessel, and shaped like the inside of a bowl. B. higher than the mercury in the vessel, and shaped like the inside of a bowl. C. lower than the mercury in the vessel, and shaped like the outside of an umbrella. D. higher than the mercury in the vessel, and shaped like the outside of an umbrella.

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  1. 4 August, 23:47
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    Answer : Lower than the mercury in the vessel, and shaped like the outside of an umbrella.

    Explanation : We know that the capillary action, In this the inter-molecular force within the mercury exceed those between the glass and the mercury

    Hence, a convex meniscus form and capillary action work in reverse.

    So, if a small diameter open glass tube is partially immersed in a vessel containing mercury, the surface of the mercury inside the tube will be lower than the mercury in the vessel, and shaped like the outside of an umbrella.
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