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Question

The meniscus of mercury in the capillary tube is


A

Convex

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B

Concave

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C

Plane

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D

Uncertain

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Solution

The correct option is A

Convex


Step 1: Definition and diagram

  1. The force of attraction between molecules of the same substance is called cohesive force
  2. The force of attraction between molecules of the different substances is called adhesion.
  3. In case of mercury cohesive force is larger than adhesive force.
  4. In the figure, capillary fall can be seen, the meniscus is in a convex shape.

There will be capillary fall and the surface will be convex.

Option A is correct.


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