Which are the correct statements

Options

A. `CHCl_(3)+CCl_(4)` - Endothermic solution
B. Acetic acid +Pyridine - Hot solution
C. `HNO_(3)+Water - Endothermic solution
D. Water+HI - Minimum azeotrope

Answer

To determine which statements are correct regarding the solutions mentioned in the question, we will analyze each option based on the concepts of non-ideal solutions, specifically focusing on positive and negative deviations.

### Step-by-Step Solution:

1. **Understanding Non-Ideal Solutions**:
- Non-ideal solutions can exhibit either positive or negative deviations from Raoult's law.
- **Positive Deviation**: Occurs when the interactions between different molecules (solute-solvent) are weaker than the interactions between like molecules (solute-solute and solvent-solvent). This results in an endothermic process (ΔH > 0).
- **Negative Deviation**: Occurs when the interactions between different molecules are stronger than the interactions between like molecules. This results in an exothermic process (ΔH < 0).

2. **Analyzing Option 1: CHCl3 + CCl4**:
- Chloroform (CHCl3) and carbon tetrachloride (CCl4) have weak interactions between them compared to their interactions with themselves.
- This indicates a positive deviation, leading to an endothermic solution (ΔH > 0).
- **Conclusion**: This statement is correct.

3. **Analyzing Option 2: Acetic Acid in Pyridine**:
- The interaction between acetic acid and pyridine is stronger than the interactions among the individual components.
- This suggests a negative deviation, which is exothermic (ΔH < 0).
- **Conclusion**: This statement is correct.

4. **Analyzing Option 3: HNO3 + Water**:
- The interaction between nitric acid (HNO3) and water is also stronger than the interactions among the individual components.
- This indicates a negative deviation, which is exothermic (ΔH < 0).
- However, the statement claims it is endothermic, which is incorrect.
- **Conclusion**: This statement is incorrect.

5. **Analyzing Option 4: Water + HI**:
- The interaction between water and hydrogen iodide (HI) involves strong hydrogen bonding, leading to a significant interaction.
- This results in a negative deviation and typically forms a maximum boiling azeotrope.
- **Conclusion**: This statement is incorrect.

### Final Conclusion:
- The correct statements are:
- **Option 1**: CHCl3 + CCl4 (Endothermic solution)
- **Option 2**: Acetic Acid in Pyridine (Exothermic solution)

Thus, the correct answers are **Option 1 and Option 2**.