The gay lussac s law was expained properly by the work of ….. A…. In 1811 here A is refers to

Options

A. Dalton
B. Avagadro
C. Gay Lussac
D. Antonie Lavoisler

Answer

To solve the question, we need to identify the scientist referred to as "A" in the context of Gay-Lussac's Law, which was explained properly in 1811.

### Step-by-Step Solution:

1. **Understanding Gay-Lussac's Law**:
- Gay-Lussac's Law states that the pressure of a gas is directly proportional to its absolute temperature when the volume is held constant. Mathematically, this can be expressed as:
\[ P \propto T \quad (\text{at constant volume}) \]
- This means if the temperature increases, the pressure also increases, provided the volume does not change.

2. **Identifying the Scientist**:
- The question mentions that the work related to Gay-Lussac's Law was explained properly by a scientist in 1811.
- The key to solving this is to recall who made significant contributions to the understanding of gas laws around that time.

3. **Recalling Historical Contributions**:
- In 1811, a scientist named Amedeo Avogadro proposed what is now known as Avogadro's Law, which states that equal volumes of gases, at the same temperature and pressure, contain an equal number of molecules.
- His work laid the groundwork for understanding the behavior of gases, which complements Gay-Lussac's findings.

4. **Conclusion**:
- Therefore, the answer to the question is that "A" refers to **Amedeo Avogadro**.

### Final Answer:
A = Amedeo Avogadro