What is meant by metal reactivity series? State its importance (any two points).

A list in which the metals are arranged in a decreasing order of their chemical reactivity is called the metal reactivity series.

The importance of metal reactivity series are:

1. The series facilitates the comparative study of metals in terms of the degree of their reactivity.
2. The compounds of the metals like oxides, carbonates, nitrates and hydroxides too can be easily compared.