Question

Which of the following metals should be electroplated on a tiffin box made of steel?
A. copper
B. chromium
C. silver
D. tin

Answer 1

Tin  is the metal electroplated on a tiffin box made of steel.

Explanation:

• Tiffin boxes made iron/steel can easily undergo rusting. So, a thin layer of tin is plated on steel to protect steel from corrosion.
• Tin plating makes food non-poisonous because it avoids contamination of food in tin boxes.
• During electroplating process, the metal to be plated is connected as anode and tin is connected as cathode. After the boxes are electroplated, it is heated above meting point of tin to form a shiny appearance.
• The process of plating tin on metal is called as tinning.