Types of Oxides Formed by Phosphorus

Phosphorus, a chemical element with symbol P and atomic number 15, readily combines with oxygen to form various types of oxides. The number of oxides formed by phosphorus is two, as stated in option B.

Explanation:

1. Phosphorus(III) Oxide (P2O3)
Phosphorus(III) oxide, also known as diphosphorus trioxide, is one of the oxides formed by phosphorus. It is composed of two phosphorus atoms and three oxygen atoms, with the chemical formula P2O3. In this oxide, phosphorus exhibits a +3 oxidation state. Phosphorus(III) oxide is a white, crystalline solid that reacts with water to form phosphorous acid (H3PO3).

2. Phosphorus(V) Oxide (P2O5)
Phosphorus(V) oxide, also known as diphosphorus pentoxide, is another oxide formed by phosphorus. It is composed of two phosphorus atoms and five oxygen atoms, with the chemical formula P2O5. In this oxide, phosphorus exhibits a +5 oxidation state. Phosphorus(V) oxide is a white, deliquescent solid that reacts vigorously with water to form phosphoric acid (H3PO4). It is commonly used as a desiccant due to its strong affinity for water.

Summary:
In summary, phosphorus combines with oxygen to form two types of oxides: phosphorus(III) oxide (P2O3) and phosphorus(V) oxide (P2O5). Phosphorus(III) oxide has the chemical formula P2O3 and phosphorus(V) oxide has the formula P2O5. These oxides have different properties and react with water to form different acids.