The oxide obtained in the roasting of ironpyrites 

Options

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

Answer

To determine the oxide obtained in the roasting of iron pyrites, we can follow these steps:

### Step 1: Identify the chemical formula of iron pyrite
Iron pyrite is known chemically as FeS₂. This means it consists of iron (Fe) and sulfur (S).

**Hint:** Remember that iron pyrite is commonly referred to as "fool's gold" and has a distinct formula that includes both iron and sulfur.

### Step 2: Understand the roasting process
Roasting is a process that involves heating the ore in the presence of oxygen. This process helps to convert the sulfide minerals into oxides.

**Hint:** Roasting typically involves the reaction of the ore with oxygen, leading to the release of gases and formation of oxides.

### Step 3: Write the balanced chemical equation for the roasting of iron pyrite
The roasting of iron pyrite can be represented by the following balanced equation:
\[ 2 \text{FeS}_2 + 3 \text{O}_2 \rightarrow 2 \text{FeO} + 2 \text{SO}_2 \]

This equation shows that two moles of iron pyrite react with three moles of oxygen to produce two moles of iron oxide (FeO) and two moles of sulfur dioxide (SO₂).

**Hint:** Pay attention to the stoichiometry of the reaction; it helps in understanding the quantities of reactants and products involved.

### Step 4: Identify the products of the reaction
From the balanced equation, we can see that the products of the roasting process are:
- Iron oxide (FeO)
- Sulfur dioxide (SO₂)

**Hint:** Focus on the products formed in the reaction; they are crucial for answering the question.

### Step 5: Conclude the answer
The oxide obtained from the roasting of iron pyrite is iron oxide (FeO), and sulfur dioxide (SO₂) is also produced as a gas. However, since the question specifically asks for the oxide, we can conclude that the answer is FeO.

**Hint:** When asked about oxides, ensure to specify the metal oxide formed in the reaction.

### Final Answer:
The oxide obtained in the roasting of iron pyrites is **FeO** (iron oxide).