Provide information about simple oxides.

(N/A) binary compound of oxygen with another element is called an oxide. As mentioned earlier,oxygen reacts with most elements of the periodic table to form oxides. In many cases,an element forms two or more oxides. These oxides show a wide variety in their nature and properties.
Oxides can be simple (e.g.,$MgO, Al_{2}O_{3}$) or mixed (e.g.,$Pb_{3}O_{4}, Fe_{3}O_{4}$). Simple oxides can be classified on the basis of their acidic,basic,or amphoteric character.
An oxide that combines with water to give an acid is termed an acidic oxide (e.g.,$SO_{2}, Cl_{2}O_{7}, CO_{2}, N_{2}O_{5}$). For example,$SO_{2}$ combines with water to form $H_{2}SO_{3}$ acid.
$SO_{2} + H_{2}O \rightarrow H_{2}SO_{3}$
As a general rule,only non-metal oxides are acidic,but oxides of some metals in high oxidation states also have acidic character (e.g.,$Mn_{2}O_{7}, CrO_{3}, V_{2}O_{5}$).
Oxides that give a base with water are known as basic oxides (e.g.,$Na_{2}O, CaO, BaO$).
For example,$CaO$ reacts with water to form $Ca(OH)_{2}$ base.
$CaO + H_{2}O \rightarrow Ca(OH)_{2}$
In general,metallic oxides are basic.
Some metallic oxides exhibit dual behavior. They show characteristics of both acidic and basic oxides. These are called amphoteric oxides. They react with both acids and bases.
For example,$Al_{2}O_{3}$ reacts with both acids and bases.
$Al_{2}O_{3(s)} + 6HCl_{(aq)} + 9H_{2}O_{(l)} \rightarrow 2[Al(H_{2}O)_{6}]^{3+}_{(aq)} + 6Cl^{-}_{(aq)}$
$Al_{2}O_{3(s)} + 6NaOH_{(aq)} + 3H_{2}O_{(l)} \rightarrow 2Na_{3}[Al(OH)_{6}]_{(aq)}$
Some oxides which are neither acidic nor basic are known as neutral oxides. $CO, NO,$ and $N_{2}O$ are examples of neutral oxides.