`FeSO_(4)` on heating gives

Options

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

Answer

To determine what happens when `FeSO4` (ferrous sulfate) is heated, we can break down the process step by step.

### Step-by-Step Solution:

1. **Identify the Compound**:
- We start with `FeSO4`, which is ferrous sulfate. In its hydrated form, it is often represented as `FeSO4·7H2O` (ferrous sulfate heptahydrate).

2. **Heating the Hydrated Form**:
- When `FeSO4·7H2O` is heated, it undergoes a decomposition reaction. The water molecules (7H2O) are released as steam, and the hydrated ferrous sulfate breaks down to form anhydrous ferrous sulfate (`FeSO4`).

**Reaction**:
\[ \text{FeSO}_4 \cdot 7\text{H}_2\text{O} \xrightarrow{\text{heat}} \text{FeSO}_4 + 7\text{H}_2\text{O} \]

3. **Heating Anhydrous Ferrous Sulfate**:
- Further heating of the anhydrous ferrous sulfate (`FeSO4`) leads to its decomposition into ferric oxide (`Fe2O3`), sulfur dioxide (`SO2`), and sulfur trioxide (`SO3`).

**Reaction**:
\[ 4\text{FeSO}_4 \xrightarrow{\text{heat}} 2\text{Fe}_2\text{O}_3 + 4\text{SO}_2 + \text{SO}_3 \]

4. **Final Products**:
- The final products of heating `FeSO4` are:
- Ferric oxide (`Fe2O3`)
- Sulfur dioxide (`SO2`)
- Sulfur trioxide (`SO3`)

### Conclusion:
When `FeSO4` is heated, it decomposes to form ferric oxide, sulfur dioxide, and sulfur trioxide.