The only metal that is anti-bacterial is?

A. Iron
B. Sodium
C. Alluminium
D. Copper

Correct Answer:

Option D – Copper

Explanation

Aluminium sulfate is a salt soluble in water and is mainly used as a coagulating agent in the purification of drinking water.

Copper demonstrated the greatest antimicrobial activity. The silver coatings demonstrated the second most antimicrobial surface.