Which of the following is a negative charge colloidal sol?
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Negative charge colloidal sols are often more stable than positive charge sols because the repulsion between similarly charged particles helps prevent aggregation. This property is used in various applications like water purification and drug delivery systems.
A colloidal sol is a type of mixture in which very fine particles of one substance are dispersed in another substance. The particles in a colloidal sol are typically between 1 nm and 1000 nm in size. These particles can carry either a positive or a negative charge depending on their nature.
Gold (A): Gold sols are negatively charged colloids. The gold particles dispersed in a medium can carry a negative charge, making it a negative charge colloidal sol.
Sulfur (B): Sulfur also forms negatively charged colloidal sols, where the sulfur particles are dispersed in water.
Clay (C): Clay particles are negatively charged in nature when suspended in water, forming a negative charge colloidal sol.
Thus, all the substances (Gold, Sulfur, and Clay) can form negative charge colloidal sols.
Therefore, the correct answer is (D) All of these.
