A : Complete hydrolysis of one mole of peroxydi-sulphuric acid gives one omle of `H_2O_2` and 2 mole `H_2SO_4`.
R : Peroxydisulphuric acid has zero peroxy lingage.

Options

A. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1)
B. If both Assertion & Reason are true but the reason is not the correct explanantion of the assertion, then mark (2)
C. If assertion is true statements but Reason is false, then mark (3)
D. If both Assertion and Reason are false statements, then mark (4)

Answer

To solve the question, we need to analyze the assertion and reason provided regarding peroxydisulphuric acid (H2S2O8).

### Step-by-Step Solution:

1. **Understanding the Assertion**:
- The assertion states that the complete hydrolysis of one mole of peroxydisulphuric acid (H2S2O8) yields one mole of hydrogen peroxide (H2O2) and two moles of sulfuric acid (H2SO4).
- The molecular formula of peroxydisulphuric acid is H2S2O8, which contains a peroxy linkage (–O–O–).

2. **Chemical Reaction**:
- When peroxydisulphuric acid undergoes hydrolysis, it reacts with water (H2O).
- The reaction can be represented as follows:
\[ H2S2O8 + H2O \rightarrow H2O2 + 2 H2SO4 \]
- This indicates that one mole of peroxydisulphuric acid produces one mole of hydrogen peroxide and two moles of sulfuric acid.

3. **Verification of the Assertion**:
- The assertion is correct as the hydrolysis of peroxydisulphuric acid indeed yields 1 mole of H2O2 and 2 moles of H2SO4.

4. **Understanding the Reason**:
- The reason states that peroxydisulphuric acid has zero peroxy linkage.
- However, peroxydisulphuric acid contains a peroxy linkage (–O–O–), which is a characteristic feature of compounds that contain peroxy groups.

5. **Verification of the Reason**:
- The reason is incorrect because peroxydisulphuric acid does have a peroxy linkage, contrary to what is stated.

6. **Conclusion**:
- The assertion is true, while the reason is false. Therefore, the correct option is that the assertion is true, but the reason is false.

### Final Answer:
- Assertion (A) is true, and Reason (R) is false.