Which of the following characteristics of products obtained when green vitriol is strongly heated?

Options

A. Basic oxide
B. Neutral oxide
C. acidic oxide
D. Reducing agent

Explanation

To solve the question regarding the characteristics of products obtained when green vitriol (ferrous sulfate, FeSO4) is strongly heated, we can follow these steps:

### Step 1: Identify Green Vitriol
Green vitriol is chemically known as ferrous sulfate (FeSO4) and contains seven molecules of water (7H2O) as water of crystallization.

### Step 2: Write the Reaction for Heating
When green vitriol is strongly heated, it undergoes a decomposition reaction. The reaction can be represented as follows:
\[ \text{FeSO}_4 \cdot 7\text{H}_2\text{O} \xrightarrow{\text{heat}} \text{Fe}_2\text{O}_3 + \text{SO}_2 + \text{SO}_3 + \text{H}_2\text{O} \]

### Step 3: Identify the Products
From the reaction, we can identify the products:
1. Ferric oxide (Fe2O3)
2. Sulfur dioxide (SO2)
3. Sulfur trioxide (SO3)

### Step 4: Determine the Characteristics of Each Product
- **Ferric Oxide (Fe2O3)**: This is a basic oxide. It can react with acids to form salts and water.
- **Sulfur Dioxide (SO2)**: This is an acidic oxide. It can react with water to form sulfurous acid (H2SO3).
- **Sulfur Trioxide (SO3)**: This is also an acidic oxide. It can react with water to form sulfuric acid (H2SO4).

### Step 5: Conclusion on Characteristics
Based on the characteristics:
- Fe2O3 is a basic oxide.
- SO2 and SO3 are acidic oxides.

### Final Answer
The characteristics of the products obtained when green vitriol is strongly heated are:
- Ferric oxide (Fe2O3) is a basic oxide.
- Sulfur dioxide (SO2) and sulfur trioxide (SO3) are acidic oxides.