A simplified version of which separation process is seen in a coffee or tea maker?

A simplified version of which separation process is seen in a coffee or tea maker?

• A. Distillation
• B. Leaching
• C. Filtration
• D. Evaporation

Answer: (B)

Leaching is the removal of soluble components from a solid by contacting it with a liquid solvent. In a coffee or tea maker, hot water acts as the solvent and flows through the solid material (coffee grounds or tea leaves). The soluble compounds—flavor compounds, caffeine, acids—dissolve into the water as it passes, creating a flavorful beverage while the solid particles remain behind. This exposure and transfer of solubles into the liquid is the simplest real-world example of leaching. Distillation and evaporation rely on vaporization and phase changes, and filtration is just separating solids from liquid after dissolution; none of those describe the primary extraction happening in brewing. So brewing coffee or tea is a straightforward illustration of leaching.

Leaching is the removal of soluble components from a solid by contacting it with a liquid solvent. In a coffee or tea maker, hot water acts as the solvent and flows through the solid material (coffee grounds or tea leaves). The soluble compounds—flavor compounds, caffeine, acids—dissolve into the water as it passes, creating a flavorful beverage while the solid particles remain behind. This exposure and transfer of solubles into the liquid is the simplest real-world example of leaching. Distillation and evaporation rely on vaporization and phase changes, and filtration is just separating solids from liquid after dissolution; none of those describe the primary extraction happening in brewing. So brewing coffee or tea is a straightforward illustration of leaching.