The `%` of Hydrogen in water and Hydrogen peroxide is `11.2%` and `5.94%` respectively. This illustrates the law of

Options

A. Constant Proportions
B. Conservation of mass
C. Multiple Proportions
D. Law of Gaseous volume.

Explanation

To solve the question regarding the percentage of hydrogen in water and hydrogen peroxide and to identify which law it illustrates, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Percentages Given**:
- The percentage of hydrogen in water (H₂O) is given as 11.2%.
- The percentage of hydrogen in hydrogen peroxide (H₂O₂) is given as 5.94%.

2. **Calculate the Mass of Hydrogen in 100 g of Each Compound**:
- For water (H₂O):
- Mass of hydrogen = 11.2 g (in 100 g of H₂O).
- For hydrogen peroxide (H₂O₂):
- Mass of hydrogen = 5.94 g (in 100 g of H₂O₂).

3. **Calculate the Mass of Oxygen in Each Compound**:
- For water (H₂O):
- Molar mass of water = 2 (H) + 16 (O) = 18 g/mol.
- Mass of oxygen in 100 g of H₂O = 100 g - 11.2 g = 88.8 g.
- For hydrogen peroxide (H₂O₂):
- Molar mass of hydrogen peroxide = 2 (H) + 32 (O) = 34 g/mol.
- Mass of oxygen in 100 g of H₂O₂ = 100 g - 5.94 g = 94.06 g.

4. **Calculate the Ratio of Masses of Hydrogen to Oxygen**:
- For water (H₂O):
- Ratio of H to O = 11.2 g (H) : 88.8 g (O) = 1 : 7.93.
- For hydrogen peroxide (H₂O₂):
- Ratio of H to O = 5.94 g (H) : 94.06 g (O) = 1 : 15.86.

5. **Compare the Ratios**:
- The ratio of hydrogen in H₂O to H₂O₂ can be simplified:
- The ratio of the amounts of hydrogen in H₂O and H₂O₂ is 11.2 g : 5.94 g.
- This can be expressed as approximately 2 : 1 when simplified.

6. **Identify the Law Illustrated**:
- The ratios of the masses of hydrogen in the two compounds (H₂O and H₂O₂) are in a simple whole number ratio (2:1).
- This illustrates the **Law of Multiple Proportions**, which states that when two elements combine to form two or more compounds, the ratios of the masses of one element that combine with a fixed mass of the other element can be expressed as small whole numbers.

### Conclusion:
The percentages of hydrogen in water and hydrogen peroxide illustrate the **Law of Multiple Proportions**.