Alum, a chemical compound long used in traditional water treatment, is primarily added to water for what purpose?

Explanation

Alum is traditionally added to water during treatment because it helps particles suspended in the water clump together into larger masses, called flocs, which then settle out or can be filtered more easily, leaving the water noticeably clearer. This process, known as coagulation and flocculation, is an important early step in many water purification systems. Alum has also historically been used in smaller quantities in some food preparation and traditional medicine applications. Explore more Everyday Science MCQs on mcqstutor to keep practicing.