In colloid chemistry, which scientist is associated with the concept of 'protective power' of colloids?

In colloid chemistry, which scientist is associated with the concept of 'protective power' of colloids?

• A. Zsigmondy
• B. Nuggets
• C. Dolomite
• D. None of the above

Answer: (A)

Protective power describes how certain colloids can stabilize another colloidal system by forming a surface layer around the dispersed particles, preventing them from coagulating. This protective layer—often made by a lyophilic or protective colloid—regulates interactions at the particle surface, either by providing steric hindrance or by modifying surface charge, so the sol remains stable even when conditions would otherwise cause coagulation. Richard Adolf Zsigmondy is the scientist historically linked to this concept. He studied colloidal systems and showed how protective colloids can impart stability to suspensions, highlighting the stabilizing role of these surface adsorbed layers. The other names listed don’t correspond to this idea, and the option “None of the above” isn’t appropriate here since Zsigmondy is recognized for this concept.

Protective power describes how certain colloids can stabilize another colloidal system by forming a surface layer around the dispersed particles, preventing them from coagulating. This protective layer—often made by a lyophilic or protective colloid—regulates interactions at the particle surface, either by providing steric hindrance or by modifying surface charge, so the sol remains stable even when conditions would otherwise cause coagulation.

Richard Adolf Zsigmondy is the scientist historically linked to this concept. He studied colloidal systems and showed how protective colloids can impart stability to suspensions, highlighting the stabilizing role of these surface adsorbed layers. The other names listed don’t correspond to this idea, and the option “None of the above” isn’t appropriate here since Zsigmondy is recognized for this concept.