Question

stara helps her father install an air purifier in her house. what type of separation method does an air purifier use to remove dust and allergens from the air?
a. distillation
b. filtration
c. evaporation
d. magnetic attraction

Explanation:

Air purifiers use filters to trap dust and allergens from the air. Filtration is a separation method that involves passing a mixture (in this case, air with contaminants) through a porous material (the filter) to separate the solid particles (dust, allergens) from the gas (air). Distillation is used for separating liquids based on boiling points, evaporation is for separating a liquid from a solid dissolved in it (e.g., salt - water separation), and magnetic attraction is for separating magnetic materials from non - magnetic ones.

Answer:

B. filtration