Viscosity is the physical property of a fluid related to which of the following?

• A. Resistance to flow
• B. Color
• C. Transparency
• D. Taste

Answer: (A)

Viscosity is the measure of how much a fluid resists flowing when a force is applied. It reflects the internal friction within the liquid—the thicker it is, the more it resists movement. That’s why honey flows slowly while water pours quickly. So the property described by viscosity is resistance to flow, not color, transparency, or taste. Color comes from which wavelengths of light are absorbed, transparency is about how see-through a substance is, and taste relates to chemical compounds that interact with taste buds.