Pieces of camphor placed on water move about rapidly. This is because of - (1) diffusion (2) viscosity (3) surface tension (4) capillarity

Pieces of camphor placed on water move about rapidly. This is because of - (1) diffusion (2) viscosity (3) surface tension (4) capillarity
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(3) surface tension Explanation: The Camphor slowly dissolves in the water lowering the latter's surface tension in the immediate neighbourhood. When after sometime the whole surface settles for the reduced tension, the movement of the camphor too short.
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