`H_2 S` on complete combustion with oxygen forms mainly

Options

A. `H_2 O and SO_2`
B. `H_2 and S`
C. `H_2 and SO_2`
D. `H_2 O and S`

Explanation

To determine the products formed when hydrogen sulfide (H₂S) undergoes complete combustion with oxygen (O₂), we can follow these steps:

### Step 1: Understand the Reactants
- The reactants in this reaction are hydrogen sulfide (H₂S) and oxygen (O₂).

### Step 2: Write the General Reaction for Combustion
- The general reaction for the combustion of a hydrocarbon or a compound containing hydrogen and sulfur can be represented as:
\[ \text{Hydrocarbon} + \text{Oxygen} \rightarrow \text{Products} \]

### Step 3: Identify the Products of Combustion
- When H₂S combusts completely, it reacts with oxygen to produce sulfur dioxide (SO₂) and water (H₂O). This can be represented as:
\[ 2 \text{H}_2\text{S} + 3 \text{O}_2 \rightarrow 2 \text{SO}_2 + 2 \text{H}_2\text{O} \]

### Step 4: Confirm the Products
- From the balanced equation, we can see that the main products of the complete combustion of H₂S are sulfur dioxide (SO₂) and water (H₂O).

### Conclusion
- Therefore, the main products formed when H₂S undergoes complete combustion with oxygen are **sulfur dioxide (SO₂) and water (H₂O)**.

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