Explain the following in one or two sentances only :
"Orthophosphorous acid is not a tribasic acid".

Explanation

**Step-by-Step Text Solution:**

1. **Identify the Chemical Formula**: Orthophosphorous acid has the chemical formula H₃PO₃.

2. **Understand Basicity**: Basicity refers to the number of acidic hydrogen atoms in an acid, which are typically attached to highly electronegative atoms like oxygen.

3. **Analyze the Structure**: The structure of orthophosphorous acid includes one phosphorus atom bonded to three oxygen atoms, where two of these oxygen atoms are part of hydroxyl (OH) groups.

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