Multiple choice

Galvanised iron sheets have a coating of ______.

  1. tin

  2. lead

  3. zinc

  4. chromium

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

Galvanisation is the process of applying a protective zinc coating to iron or steel to prevent rusting. Zinc acts as a sacrificial anode, oxidizing preferentially to iron, and also forms a protective layer of zinc carbonate that prevents atmospheric corrosion.