20 volume hydrogen peroxide means

Options

A. 1 ml of `H_(2)O_(2)` solution gives 20 L of `O_(2)` at NTP
B. 1 mole of `H_(2)O_(2)` solution gives 20 L of `O_(2)` at NTP
C. 1 g of `H_(2)O_(2)` give 20 ml of `O_(2)` at NTP
D. 1 ml of `H_(2)O_(2)` solution give 20 ml of `O_(2)` at NTP

Answer

To solve the question "20 volume hydrogen peroxide means," we need to understand the concept of volume strength in relation to hydrogen peroxide (H₂O₂) and its decomposition reaction.

### Step-by-Step Solution:

1. **Understanding Volume Strength**:
- Volume strength indicates the volume of oxygen gas (O₂) that can be produced from a certain volume of hydrogen peroxide solution when it decomposes completely.

2. **Decomposition Reaction**:
- The decomposition of hydrogen peroxide can be represented by the following chemical equation:
\[ 2 \text{H}_2\text{O}_2 \rightarrow 2 \text{H}_2\text{O} + \text{O}_2 \]
- From this reaction, we can see that 2 moles of hydrogen peroxide produce 1 mole of oxygen gas.

3. **Volume Strength Definition**:
- A 20 volume hydrogen peroxide solution means that 1 liter of this solution will produce 20 liters of oxygen gas at Normal Temperature and Pressure (NTP).

4. **Conversion to Milliliters**:
- Since 1 liter = 1000 milliliters, we can also say that:
- 1 ml of 20 volume hydrogen peroxide solution will produce 20 ml of oxygen gas at NTP.

5. **Evaluating Options**:
- Now, let's evaluate the given options based on our understanding:
- **Option 1**: 1 ml of hydrogen peroxide solution gives 20 liters of O₂ at NTP. (Incorrect)
- **Option 2**: 1 mole of hydrogen peroxide solution gives 20 liters of O₂ at NTP. (Incorrect)
- **Option 3**: 1 gram of hydrogen peroxide gives 20 ml of O₂ at NTP. (Incorrect)
- **Option 4**: 1 ml of hydrogen peroxide solution gives 20 ml of O₂ at NTP. (Correct)

6. **Conclusion**:
- Therefore, the correct interpretation of "20 volume hydrogen peroxide" is that 1 ml of this solution gives 20 ml of oxygen gas at NTP.

### Final Answer:
The correct option is **Option 4**: 1 ml of hydrogen peroxide solution gives 20 ml of O₂ at NTP.

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