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Question

The meniscus of water is ________.


A

Convex

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B

Plane

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C

Concave

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D

Uncertain

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Solution

The correct option is C

Concave


Cohesive and adhesive forces:

  1. The force of attraction between molecules of the same substance is called cohesive force.
  2. And the force of attraction between molecules of different substances is called adhesive force.

Explanation:

  1. In the case of water, as density is low, adhesive force is more as compared to cohesive force and capillary rise will take place.
  2. Thus, the meniscus will be of concave shape.

In the figure, the capillary rise can be seen, the meniscus is in a concave shape.

Therefore, the meniscus of water is concave.

Option C is correct.


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