Which technique is described as breaking down solids into smaller units using mechanical energy with a vibrating base, suitable for wet or dry state?

• A. Sieving
• B. Mincing
• C. Homogenizing
• D. Pulverizing

Answer: (D)

Size reduction of solids through mechanical energy is being tested here, specifically using vibration to drive the breaking of particles into finer pieces. Pulverizing relies on grinding mechanisms—impact, shear, and attrition—to produce small solid particles, and a vibrating base helps keep materials moving, prevent packing, and improve contact with grinding surfaces, so it works effectively for both wet slurries and dry powders. This versatility is what makes pulverizing the best fit for turning solids into fine particles. Sieving, by contrast, separates particles by size after they’ve been broken down and usually uses a screen rather than driving breakdown itself. Mincing involves cutting into small pieces rather than grinding to powders, so it doesn’t achieve fine particle formation. Homogenizing aims to mix and disperse phases, often through high shear, rather than producing uniform small solids through vibration-based grinding.