Is Transparent rock candy is finely ground into an opaque white powder physical or chemical change?

The transformation of transparent rock candy into an opaque white powder is a physical change.

Explanation:

Physical change involves alterations in the physical properties or appearance of a substance without changing its chemical composition. In this case, the rock candy undergoes a change in its physical form, from a solid transparent crystal to a fine white powder. The change is due to the mechanical grinding process that breaks down the larger crystals into smaller particles, increasing their surface area and causing the powder to appear opaque.

Chemical change, involves a chemical reaction that results in the formation of new substances with different chemical compositions. It typically involves the breaking and formation of chemical bonds. No chemical reaction occurs when rock candy is ground into a powder. The substance retains its chemical identity throughout the process.

Therefore, the transformation of transparent rock candy into an opaque white powder is a physical change.