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 regarding what "20 volume hydrogen peroxide" means, we can break it down into several steps:

### Step-by-Step Solution:

1. **Understanding Volume Strength**:
- The term "volume strength" of hydrogen peroxide (H2O2) indicates the volume of oxygen gas (O2) that can be released from a given volume of hydrogen peroxide solution when it decomposes.

2. **Definition of 20 Volume**:
- When we say "20 volume hydrogen peroxide," it means that 1 mL of this hydrogen peroxide solution will produce 20 mL of oxygen gas (O2) at standard temperature and pressure (STP) when it decomposes.

3. **Decomposition of Hydrogen Peroxide**:
- The decomposition reaction of hydrogen peroxide can be represented as:
\[ 2 H_2O_2 \rightarrow 2 H_2O + O_2 \]
- From this reaction, we can see that 2 moles of hydrogen peroxide yield 1 mole of oxygen gas.

4. **Calculating Volume of Oxygen**:
- Since 1 mL of 20 volume hydrogen peroxide produces 20 mL of oxygen, we can conclude that the volume strength indicates how much oxygen is produced from the decomposition of the given volume of hydrogen peroxide.

5. **Conclusion**:
- Therefore, "20 volume hydrogen peroxide" means that 1 mL of this solution will liberate 20 mL of oxygen gas at STP.

### Final Answer:
20 volume hydrogen peroxide means that 1 mL of the solution will liberate 20 mL of oxygen gas (O2) at standard temperature and pressure (STP).

---