When Cu is reacted with hot concentrated solution of `H_(2) SO_(4)` then the gas obtained is

Options

A. `O_(2)`
B. `H_(2)`
C. `SO_2`
D. `SO_3`

Answer

To determine the gas obtained when copper (Cu) reacts with hot concentrated sulfuric acid (H₂SO₄), we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Reactants**: The reactants in this reaction are copper (Cu) and hot concentrated sulfuric acid (H₂SO₄).

2. **Write the Reaction**: The reaction between copper and hot concentrated sulfuric acid can be represented as:
\[ \text{Cu} + \text{H}_2\text{SO}_4 \rightarrow \text{CuSO}_4 + \text{SO}_2 + \text{H}_2\text{O} \]

3. **Identify the Products**: From the reaction, we can see that the products formed are copper sulfate (CuSO₄), sulfur dioxide (SO₂), and water (H₂O).

4. **Determine the Gas Produced**: Among the products, sulfur dioxide (SO₂) is the gas that is produced during this reaction.

5. **Final Answer**: Therefore, the gas obtained when copper reacts with hot concentrated sulfuric acid is **SO₂ (sulfur dioxide)**.