Which of the following statement(s) is/are true for a colloidal solution of gold in water (Gold sol.)

Question

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Solution:

A. True. Colloidal solutions exhibit the Tyndall effect, making the path of light visible.

B. False. Gold sols are negatively charged due to adsorption of anions.

C. True. Starch acts as a protective colloid, stabilizing the gold sol and preventing coagulation.

D. True. Prolonged electrophoresis removes the charge on colloidal particles, leading to coagulation and destruction of the sol.

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