Intermolecular forces between two benzene molecules are nearly of same strength as those between two toluene molecules. For a mixture of benzene and toluene, which of the following are not true?

Options

A. `Delta_(mix)` H = zero
B. `Delta_(mix)` V= zero
C. These will from minimum boilng azeotrope
D. These will not from ideal solution

Explanation

To solve the question regarding the mixture of benzene and toluene, we need to analyze the properties of ideal solutions and the implications of the intermolecular forces mentioned in the question.

### Step-by-Step Solution:

1. **Understanding Intermolecular Forces**:
- We are given that the intermolecular forces between two benzene molecules are nearly the same as those between two toluene molecules. This suggests that the interactions (AA and BB) are similar.

2. **Defining Ideal Solutions**:
- An ideal solution is one that follows Raoult's Law, where the vapor pressure of each component in the mixture is proportional to its mole fraction. In an ideal solution, the interactions between like molecules (AA and BB) are equal to the interactions between unlike molecules (AB).

3. **Applying the Concept**:
- Since the intermolecular forces between benzene and toluene are similar, we can infer that the AB interactions will also be similar to AA and BB interactions. This indicates that benzene and toluene will form an ideal solution.

4. **Analyzing Enthalpy and Volume Changes**:
- For an ideal solution, the change in enthalpy (ΔH mixing) is zero, meaning there is no heat absorbed or released during mixing.
- Similarly, the change in volume (ΔV mixing) is also zero, indicating that the total volume of the solution is the sum of the volumes of the individual components.

5. **Evaluating the Statements**:
- **Statement 1**: ΔH mixing is zero. (True)
- **Statement 2**: ΔV mixing is zero. (True)
- **Statement 3**: They will form a minimum boiling azeotrope. (Not True, as azeotropes are characteristic of non-ideal solutions)
- **Statement 4**: They will not form an ideal solution. (Not True, as we established they do form an ideal solution)

6. **Conclusion**:
- The statements that are not true for the mixture of benzene and toluene are statements 3 and 4.

### Final Answer:
The statements that are not true are:
- They will form a minimum boiling azeotrope.
- They will not form an ideal solution.