Which statement explains why sugar dissolves easily in water, but sand does not?

Question

Sugar has a greater buoyant force than sand.
Sugar has a greater conductivity than sand.
Sugar has a greater hardness than sand.
Sugar has a greater solubility than sand.

Answer 1

The statement that explains why sugar dissolves easily in water, but sand does not is:

Sugar has a greater solubility than sand.

This is because sugar is polar and can form hydrogen bonds with water molecules, allowing it to dissolve easily, whereas sand (primarily composed of silicon dioxide) is largely insoluble in water.