Ferric sulphate on heating gives:

Options

A. `SO_(2)` and `SO_(3)`
B. `SO_(2)` only
C. `SO_(3)` only
D. `S`

Answer

To solve the question "Ferric sulphate on heating gives:", we will analyze the thermal decomposition of ferric sulphate (Fe2(SO4)3) step by step.

### Step-by-Step Solution:

1. **Identify the Compound**:
- Ferric sulphate is represented by the chemical formula Fe2(SO4)3.

2. **Understand Thermal Decomposition**:
- When ferric sulphate is heated, it undergoes thermal decomposition. This means it breaks down into simpler substances when subjected to heat.

3. **Determine the Heating Conditions**:
- The decomposition of ferric sulphate typically occurs at high temperatures, specifically between 500°C to 700°C.

4. **Write the Decomposition Reaction**:
- The thermal decomposition of ferric sulphate can be represented by the following chemical equation:
\[ 2 \, \text{Fe}_2(\text{SO}_4)_3 \, \xrightarrow{\text{heat}} \, 2 \, \text{Fe}_2\text{O}_3 + 6 \, \text{SO}_3 \]
- This indicates that when ferric sulphate is heated, it produces ferric oxide (Fe2O3) and sulfur trioxide (SO3).

5. **Identify the Products**:
- From the equation, we can see that the main gaseous product formed during the decomposition is sulfur trioxide (SO3).

6. **Conclusion**:
- Therefore, the correct answer to the question "Ferric sulphate on heating gives:" is sulfur trioxide (SO3).

### Final Answer:
Ferric sulphate on heating gives sulfur trioxide (SO3).