28. Answer the following questions:
a) Explain the phenomenon of diffusion with an example.
b) Explain why the rate of diffusion is higher in fluids than in solids.
c) List one application of diffusion in our body.
Answers
Answer:
a) Diffusion is a physical process that refers to the net movement of molecules from a region of high concentration to one of lower concentration. For instance, a gas diffuses very quickly in another gas. An example of this is the way the noxious smell of ammonia gas spreads in air.
b) The rate of diffusion of liquids higher than that of solids because liquids have higher inter-particle space than solids. This leads to higher fluidity than solids as the particles in a liquid are not as closely packed as in case of solids.
c) The diffusion of chemicals and gases in and out of cells is an essential activity in human organs. Diffusion of oxygen and carbon dioxide gas occurs in the lungs. Diffusion of water, salts, and waste products occurs in the kidneys. Diffusion of calcium from food into cells occurs in the intestines.
Answer:
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Explanation:
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