Which of the following statements are correct?

Options

A. French chemist `A`. Lavoisier is called th father of chemistry and proposed the law of conservation of mass.
B. French chemist joseph proust proposed the law of definite proportions
C. Dalton proposed the law of multiple proportion.
D. Richter proposed the law of reciprocal proportions.

Explanation

To determine which statements are correct, we will analyze each statement one by one.

1. **Statement 1**: "French chemist A. Lavizoyle is called the father of chemistry and proposed the law of conservation of mass."
- **Analysis**: Antoine Lavoisier is indeed known as the father of modern chemistry and he formulated the law of conservation of mass, which states that mass is neither created nor destroyed in a chemical reaction.
- **Conclusion**: This statement is **correct**.

2. **Statement 2**: "French chemist Joseph Proust proposed the law of definite proportions."
- **Analysis**: Joseph Proust is known for his work on the law of definite proportions, which states that a chemical compound always contains its component elements in fixed ratio by mass.
- **Conclusion**: This statement is **correct**.

3. **Statement 3**: "Dalton proposed the law of multiple proportions."
- **Analysis**: John Dalton proposed the law of multiple proportions, which states that when two elements combine to form more than one compound, the masses of one element that combine with a fixed mass of the other element are in a ratio of small whole numbers.
- **Conclusion**: This statement is **correct**.

4. **Statement 4**: "Richter proposed the law of reciprocal proportion."
- **Analysis**: Jeremias Benjamin Richter proposed the law of reciprocal proportions, which states that the ratios of the masses of different elements that combine with a fixed mass of a third element are in the same ratio as the masses of the elements that combine with each other.
- **Conclusion**: This statement is **correct**.

**Final Conclusion**: All the statements provided are correct.