For the ionic solids, CaO and Kl. Identify the wrong statement among the following

Options

A. Lattice energy of CaO is much larger than that of Kl
B. KI is soluble in benzene
C. CaO has higher melting point
D. KI has lower melting point

Explanation

To solve the question regarding the ionic solids CaO (Calcium Oxide) and KI (Potassium Iodide), we need to analyze each statement provided and determine which one is incorrect.

### Step-by-Step Solution:

1. **Evaluate Lattice Energy of CaO and KI:**
- Lattice energy is a measure of the strength of the forces between the ions in an ionic solid. It is influenced by the charges of the ions and their sizes.
- CaO consists of Ca²⁺ and O²⁻ ions, while KI consists of K⁺ and I⁻ ions.
- The charges on the ions in CaO are higher (2+) compared to those in KI (1+), which leads to stronger electrostatic attractions in CaO.
- Additionally, Ca²⁺ is smaller than K⁺, and O²⁻ is smaller than I⁻, which further increases the lattice energy of CaO compared to KI.
- **Conclusion:** The statement "Lattice energy of CaO is much larger than that of KI" is **true**.

2. **Evaluate Solubility of KI in Benzene:**
- KI is an ionic compound, while benzene is a covalent organic solvent.
- Generally, ionic compounds do not dissolve well in covalent solvents due to the principle "like dissolves like."
- Therefore, KI will not be soluble in benzene.
- **Conclusion:** The statement "KI is soluble in Benzene" is **false**.

3. **Evaluate Melting Points of CaO and KI:**
- The melting point of an ionic solid is related to its lattice energy; higher lattice energy typically results in a higher melting point.
- Since we established that CaO has a higher lattice energy than KI, it follows that CaO will have a higher melting point.
- **Conclusion:** The statement "Calcium Oxide has a higher melting point" is **true**.

4. **Evaluate the Comparison of Melting Points:**
- Since CaO has a higher melting point, it implies that KI must have a lower melting point in comparison.
- **Conclusion:** The statement "Potassium Iodide has a lower melting point" is **true**.

### Final Conclusion:
The only incorrect statement among the options provided is option 2: "KI is soluble in Benzene."