Pieces of camphor placed on water move about rapidly. This is because of diffusi

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Question
Pieces of camphor placed on water move about rapidly. This is because of
Options
A. diffusion
B. viscosity
C. surface tension
D. capillarity

Correct Answer

surface tension

Explanation

The Camphor slowly dissolves in the water lowering the latter's surface tension in the immediate neighbourhood. The stronger pull exerted by the uncontaminated portion of water brings about a movement of the surface and the camphor particles are carried along with it. When after sometime the whole surface settles for the reduced tension, the movement of the camphor too short.