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(a) Give one main difference between lyophillic and lyophobic colloids

Monjur Alahi

(a) Give one main difference between lyophillic and lyophobic colloids

(b) What is observed when

(i) A beam of light is passed through a colloidal solution.

(ii) Electric current is passed through a colloid solution


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Salim Ahmed Kawsar

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(a) Lyophillic colloids-(i) They have strong forces of attraction between the dispersed phase and dispersion medium. (ii) They are reversible in nature Lyobolic colloids (i) They have work force of attraction between the dispersed phase and dispersion medium (ii) They are irreversible in nature. (Any one difference)

(b) (i) Due to the scattering of light by colloidal particles, the path of light becomes visible. The effect is called Tyndall effect. The illuminated path of the beam of light is called Tyndall cone. (ii) The colloidal particles get precipitated at one of the electrodes, having charge opposite to the charge they have.

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