Define:
a. cohesive force
b. diffusion
c. Brownian movement
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(a) Cohesive force : The force of attraction between particles of the same substance is called cohesive force. (b) Diffusion: The phenomenon of intermixing of particles of one kind with another kind is called diffusion. (c) Brownian movement: The zig-zag motion of particles suspended in a medium is called Brownian movement
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