Which pesticide formulation process disperses solid particles in a liquid to form a suspension?

• A. Emulsification
• B. Suspension
• C. Solution
• D. Gelation

Answer: (B)

Dispersing solid pesticide particles in a liquid to form a suspension means the solid is finely divided and spread throughout the liquid without dissolving, so the mixture remains heterogeneous. This is achieved through a suspension formulation, where the active ingredient is milled to a small particle size and combined with a liquid carrier along with wetting agents, dispersants, and stabilizers to keep the particles evenly distributed and prevent rapid settling. In a pesticide suspension, maintaining proper distribution and stability during storage and application matters, which is why the solids stay suspended rather than dissolving. Emulsification would mix immiscible liquids and create droplets of one liquid in another, not solids in a liquid. A solution requires the solid to dissolve completely, forming a single uniform phase with no solid particles. Gelation forms a gel by trapping liquid in a solid-like network, not a dispersed solid in liquid.