The cans in which food is packed are coated with tin and not zinc because
- ATin is more reactive than zinc
- BZinc is more reactive than tin
- CZinc is costlier than tin
- DMore than one of the above
- ENone of the above
Show answer and explanation
Correct answer: (b) Zinc is more reactive than tin
Explanation
Zinc is more reactive than tin, so a zinc coating would react with the acids in food, forming harmful zinc compounds.
Tin is less reactive and stays unattacked by food acids, so cans are tin-plated. Zinc is used instead to galvanise iron that does not touch food.