Which type of additive promotes flocculation in suspensions?

• A. Flocculating agents
• B. Wetting agents
• C. Flavorings
• D. Sweeteners

Answer: (A)

Flocculation in suspensions is about forming loose, easily redisperable clusters of particles rather than a dense, hard cake. An additive that promotes this is a flocculating agent, which helps particles come together by reducing repulsive forces and often providing bridging between particles through polymer chains or multivalent ions. This creates a network of open, fluffy aggregates that settle quickly but can be redispersed with gentle agitation.

Wetting agents, on the other hand, mainly improve wetting and dispersion of particles by lowering interfacial tension, not by forming those loose flocs. Flavorings and sweeteners are primarily for taste and have little to no effect on the physical interactions between suspended particles, so they don’t promote flocculation.