19.Explain what is observed when - 2
(i) A beam of light is passed through a colloidal sol.
(ii) K2SO4 is added in Fe (OH)3 sol.
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When a beam of light is passed through a colloidal solution, then scattering of light is observed. This is known as the Tyndall effect. This scattering of light illuminates the path of the beam in the colloidal solution.
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