Question

What type of oxides are produced when metals combine with oxygen?

Answer 1

Answer:

Metal oxide is formed.

Explanation:

Metal forms the metal oxide that is naturally basic and turns the red litmus paper to blue.  

For example:  

1. When “Sodium combines with Oxygen” it forms Sodium Oxide that shows basic nature.  

Sodium + Oxide = sodium oxide

$4 \mathrm{Na}(\mathrm{s})+\mathrm{O}_{2}=2 \mathrm{Na}_{2} \mathrm{O}(\mathrm{s}).$

The sodium oxide dissolves in water to form Sodium Hydroxide solution.  

2. Similarly, when magnesium combines with oxygen to form Magnesium Oxide.

$2 \mathrm{Mg}(\mathrm{s})+\mathrm{O}_{2}(\mathrm{g})=2 \mathrm{MgO}_{2}$

Magnesium oxide dissolves water to form Magnesium Hydroxide Solution.

$\mathrm{MgO}+\mathrm{H}_{2} \mathrm{O}=\mathrm{Mg}(\mathrm{OH})_{2}$

Magnesium hydroxide turns red litmus blue representing magnesium oxide as a basic oxide.