When `FeSO_(4)` is strongly heated, the number of acidic gases produced is:

Options

A. One
B. Two
C. Three
D. Four

Explanation

To determine the number of acidic gases produced when FeSO₄ (ferrous sulfate) is strongly heated, we can follow these steps:

### Step 1: Write the decomposition reaction of FeSO₄
When ferrous sulfate is strongly heated, it decomposes into ferric oxide and sulfur oxides. The balanced equation for this reaction is:
\[ 2 \text{FeSO}_4 \rightarrow \text{Fe}_2\text{O}_3 + \text{SO}_2 + \text{SO}_3 \]

### Step 2: Identify the gases produced
From the balanced equation, we see that two gases are produced: sulfur dioxide (SO₂) and sulfur trioxide (SO₃).

### Step 3: Determine if the gases are acidic
Next, we need to check if these gases are acidic by examining their reactions with water:
- **SO₂ + H₂O → H₂SO₃** (sulfurous acid)
- **SO₃ + H₂O → H₂SO₄** (sulfuric acid)

Both sulfur dioxide and sulfur trioxide react with water to form acids, indicating that they are indeed acidic gases.

### Step 4: Count the number of acidic gases
Since we have identified two acidic gases (SO₂ and SO₃), we conclude that the number of acidic gases produced when FeSO₄ is strongly heated is **2**.

### Final Answer:
The number of acidic gases produced is **2**.

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