The solutions which obey Raoult's law are known as :

Options

A. Ideal solutions
B. Non-ideal solutions
C. Azeotropes
D. Binary solutions

Answer

To solve the question, "The solutions which obey Raoult's law are known as:", we need to analyze the options provided and understand the definitions of each term.

### Step-by-Step Solution:

1. **Understanding Raoult's Law**:
- Raoult's Law states that the vapor pressure of a solvent in a solution is directly proportional to the mole fraction of the solvent in the solution. This law is applicable to ideal solutions.

2. **Identifying the Options**:
- The options given are:
1. Ideal Solution
2. Non-Ideal Solution
3. Eutectic
4. Binary Solution

3. **Evaluating Each Option**:
- **Ideal Solution**: These are solutions that perfectly obey Raoult's Law. The intermolecular forces between the components are similar, leading to predictable behavior.
- **Non-Ideal Solution**: These solutions do not obey Raoult's Law due to significant differences in intermolecular forces between the components.
- **Eutectic**: This term refers to a specific type of mixture that has a constant boiling point and is not directly related to Raoult's Law.
- **Binary Solution**: This term describes a solution composed of two components, but it does not necessarily imply that it obeys Raoult's Law.

4. **Conclusion**:
- Based on the definitions, the correct answer is **Ideal Solution**, as these are the solutions that obey Raoult's Law.

### Final Answer:
The solutions which obey Raoult's law are known as **Ideal Solution**.

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