Question

Are metal oxides acidic?

Answer 1

Aluminum oxides are amphoteric (reacting both as a base or acid). Silicon, phosphorus, sulfur, and chlorine oxides are acidic. Some non-metal oxides, like laughing gas (N2O) and carbon monoxide gas (CO), don't display any acid/base characteristics.

Complete answer:
This topic educates with the classification of oxides supporting the character and property of compounds. Oxides are binary compounds formed by the reaction of oxygen with other elements. Oxygen is very reactive in nature. They react with metals and non-metal to make oxides.
The classification of oxides is completed into neutral, amphoteric, and basic or acidic supported by their acid-base characteristics.
An acidic oxide is an oxide which when combined with water gives off an acid.
A basic oxide is an oxide which when combined with water gives off a base.
When a substance reacts chemically, both as a base or acid is termed as an amphoteric solution.
Neutral Oxide is one that neither has an acidic characteristic or a basic one.
Metal Oxides have an oxidation state of -2 and usually comprise an oxygen anion. The Earth’s crust is usually made from oxides that are solid. Oxide coatings can get formed over pure elements too, as an example, a foil made from aluminum gets covered by a skinny skin of Al2O3, and this skin defends the remainder of the foil from corrosion.

Note:
Oxide, any of an outsized and important class of chemical compounds during which oxygen is combined with another element. With the exception of the lighter inert gases (helium [He], neon [Ne], argon [Ar], and krypton [Kr]), oxygen (O) forms a minimum of one binary oxide with each of the weather.