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

Galvanised iron is coated with zinc through a process called galvanisation. The zinc layer protects the underlying iron from rusting by acting as a sacrificial anode. Tin is used for tin plates, lead is toxic and not used for galvanising, and chromium is used for chrome plating.