Which formulation dissolves to form a true solution when mixed with water?

Which formulation dissolves to form a true solution when mixed with water?

• A. Soluble Powder (SP or S)
• B. Wettable Powder (WP or W)
• C. Granular (G)
• D. Pellet (P or PS)

Answer: (A)

The key idea is how formulations behave in water: a true solution occurs when the active ingredient fully dissolves and distributes uniformly, with no solid particles left behind. A Soluble Powder is designed to do just that, dissolving completely in water to form a homogeneous solution where the active ingredient is evenly present in the liquid. Wettable powders, on the other hand, disperse as tiny solid particles and form a suspension rather than a true solution, so you’ll still see particles and may need continuous stirring. Granular and pellet formulations are larger solid forms that do not dissolve to create a true solution; they either stay as solids or release active slowly as moisture acts on them, but they don’t yield a uniformly dissolved liquid. So, the formulation that dissolves to form a true solution when mixed with water is the Soluble Powder.

The key idea is how formulations behave in water: a true solution occurs when the active ingredient fully dissolves and distributes uniformly, with no solid particles left behind. A Soluble Powder is designed to do just that, dissolving completely in water to form a homogeneous solution where the active ingredient is evenly present in the liquid. Wettable powders, on the other hand, disperse as tiny solid particles and form a suspension rather than a true solution, so you’ll still see particles and may need continuous stirring. Granular and pellet formulations are larger solid forms that do not dissolve to create a true solution; they either stay as solids or release active slowly as moisture acts on them, but they don’t yield a uniformly dissolved liquid. So, the formulation that dissolves to form a true solution when mixed with water is the Soluble Powder.