Hyderolysis (complete) of peroxodisulphuric acid yields hydrogen peroxide and sulphuric acid.

Explanation

To determine whether the statement "Complete hydrolysis of peroxodisulphuric acid yields hydrogen peroxide and sulphuric acid" is true or false, we will analyze the hydrolysis process step by step.

### Step 1: Identify the chemical formula of peroxodisulphuric acid
Peroxodisulphuric acid is represented by the formula \( H_2S_2O_8 \).

**Hint:** Remember that peroxodisulphuric acid contains two sulfur atoms and is a peroxo compound.

### Step 2: Understand the hydrolysis process
Hydrolysis involves the reaction of a substance with water. In this case, we are looking at the complete hydrolysis of peroxodisulphuric acid.

**Hint:** Hydrolysis typically involves breaking down a compound by the addition of water.

### Step 3: Write the reaction for complete hydrolysis
When peroxodisulphuric acid undergoes complete hydrolysis, it reacts with water. The reaction can be represented as follows:

\[ H_2S_2O_8 + 2 H_2O \rightarrow 2 H_2SO_4 + H_2O_2 \]

This indicates that one molecule of peroxodisulphuric acid reacts with two molecules of water to produce two molecules of sulfuric acid and one molecule of hydrogen peroxide.

**Hint:** Pay attention to the stoichiometry of the reaction to ensure the correct number of molecules are accounted for.

### Step 4: Identify the products
From the reaction, we can see that the products of the complete hydrolysis are:
- Sulfuric acid (\( H_2SO_4 \))
- Hydrogen peroxide (\( H_2O_2 \))

**Hint:** Make sure to recognize the chemical formulas of the products to confirm they match the statement.

### Step 5: Conclusion
Since the hydrolysis of peroxodisulphuric acid yields both hydrogen peroxide and sulfuric acid, we can conclude that the statement given in the question is true.

**Final Answer:** The statement is true.