In which of the following solvents, KI has highest solubility?

Options

A. `C_(6)H_(6)(in=0)`
B. `(CH_(3))_(2)CO(in=2)`
C. `CH_(3)OH(in=32)`
D. `C Cl_(4)(in=0)`

Answer

To determine in which solvent KI (potassium iodide) has the highest solubility, we need to analyze the polarity of the given solvents and how it relates to the solubility of KI.

### Step-by-Step Solution:

1. **Identify the Nature of KI**:
- KI is an ionic compound, which means it is polar. Ionic compounds generally dissolve well in polar solvents.

2. **List the Given Solvents**:
- The solvents provided are:
- A) C6H6 (Benzene)
- B) CH3O (Methoxy)
- C) CH3OH (Methanol)
- D) CCl4 (Carbon Tetrachloride)

3. **Analyze Each Solvent**:
- **A) C6H6 (Benzene)**:
- Benzene is a non-polar solvent. Ionic compounds like KI do not dissolve well in non-polar solvents.
- **B) CH3O (Methoxy)**:
- Methoxy is a polar compound, but its polarity is relatively low compared to alcohols. It may have some solubility for KI, but not the highest.
- **C) CH3OH (Methanol)**:
- Methanol is a polar solvent and can form hydrogen bonds. It is known to dissolve ionic compounds very well, including KI.
- **D) CCl4 (Carbon Tetrachloride)**:
- CCl4 is a non-polar solvent. Similar to benzene, it will not dissolve ionic compounds effectively.

4. **Conclusion**:
- Among the solvents analyzed, methanol (CH3OH) is the most polar and can effectively solvate KI due to its ability to form hydrogen bonds and its overall polarity. Therefore, KI will have the highest solubility in methanol.

### Final Answer:
- The solvent in which KI has the highest solubility is **C) CH3OH (Methanol)**.