Name two metals which are found in nature in the free state.

Why do ionic compounds have high melting points?

Define the terms: (i) mineral (ii) ore, and (iii) gangue. .

What chemical process is used for obtaining a metal from its oxide?

Zinc oxide, magnesium oxide and copper oxide were heated, turn by turn, with zinc, magnesium and copper metals as shown in the following table:

In which cases will you find displacement reactions taking place?