Q.

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

A. diffusion
B. viscosity
C. surface tension
D. capillarity
Answer» C. surface tension
Explanation: The Camphor slowly dissolves in the water lowering the latter’s surface tension in the immediate neighborhood. 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.
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