Question

Arrange the following metals in the decreasing order of their reactivity with metal salts.

• A. Copper
• B. Iron
• C. Calcium
• D. Zinc
• E. Potassium

Answer 1

In a reactivity series, the most reactive element is placed at the top and the least reactive element at the bottom. A more reactive element will displace a less reactive metal from its salt solution. The displacement reaction is based on the principle of reactivity series.