Multiple choice

What are dissolved and suspended impurities called?

  1. Contaminants

  2. Faces

  3. Sludge

  4. Biogas

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Contaminants is the correct term for dissolved and suspended impurities in water. Feces refers to solid waste (misspelled as 'Faces'), sludge is semi-solid byproduct of treatment, and biogas is a fuel gas produced from organic matter breakdown - none describe dissolved/suspended impurities.