With the help of the following equations, answer the given questions:
(i) `HCl(aq)+NaOH(aq)toNaCl(aq)+H_(2)O(l)`
(ii) `H_(2)SO_(4)(aq)+2NaOH(aq)toNa_(2)SO_(4)(aq)+2H_(2)O(l)`
(iii) `H_(3)PO_(4)(aq)+3NaOH(aq)toNa_(3)PO_(4)(aq)+3H_(2)O(l)`
Is sulphuric acid a diprotic acid?

Explanation

To determine if sulfuric acid (H₂SO₄) is a diprotic acid, we can analyze the provided chemical equations and the definition of a diprotic acid.

### Step-by-step Solution:

1. **Understanding Diprotic Acids**: A diprotic acid is an acid that can donate two protons (H⁺ ions) per molecule when it dissociates in solution.

2. **Analyzing the Given Equations**:
- The first equation is:
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