Mass of dissolved gas by a fixed volume of liquid is directly proportional to the pressure of gas on the liquid surface. This law is:

Options

A. Boyle.s law
B. Avogadro.s law
C. Henry.s law
D. Charles.s law

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the law that states the relationship between the mass of dissolved gas in a liquid and the pressure of that gas above the liquid.

2. **Identifying the Law**: The law that describes this relationship is known as Henry's Law.

3. **Stating Henry's Law**: Henry's Law can be stated as: "The mass of a gas that dissolves in a given volume of liquid at a constant temperature is directly proportional to the pressure of the gas above the liquid."

4. **Expressing the Law Mathematically**: This relationship can be expressed mathematically as:
\[ C = k_H \cdot P \]
where:
- \( C \) is the concentration of the dissolved gas,
- \( k_H \) is Henry's law constant (specific to each gas-liquid combination),
- \( P \) is the partial pressure of the gas.

5. **Conclusion**: Therefore, the answer to the question is Henry's Law.

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