Select correct order

Options

A. `LiFltNaFltKFltRbF`(Lattice energy)
B. `NaIltNaBrltNaClltNaF`(Ionic character)
C. `K^(+)ltCa^(2+)ltCd^(2+)`(Polarsing power)
D. `S^(2-)ltO^(2-)ltF`(Polarizability)

Explanation

To solve the question regarding the correct order of lattice energy, ionic character, polarizing power, and polarizability, we will analyze each order step by step.

### Step 1: Lattice Energy Order
**Given Order:** LiF < NaF < KF < RbF

**Explanation:**
- Lattice energy is the energy required to separate one mole of an ionic compound into its gaseous ions.
- It is influenced by the size of the ions: smaller ions lead to stronger attractions and thus higher lattice energy.
- In this case, all compounds have the same anion (F⁻), but different cations (Li⁺, Na⁺, K⁺, Rb⁺) from the same group in the periodic table.
- As we move down the group from Li to Rb, the size of the cation increases, leading to a decrease in lattice energy.

**Correct Order:** LiF > NaF > KF > RbF (not the order given in the question)

### Step 2: Ionic Character Order
**Given Order:** NaI < NaBr < NaCl < NaF

**Explanation:**
- The ionic character of a compound is influenced by the difference in electronegativity between the cation and anion.
- In this case, all compounds have the same cation (Na⁺) and different halides (I⁻, Br⁻, Cl⁻, F⁻).
- The electronegativity increases from I to F, meaning NaF has the highest ionic character due to the largest difference in electronegativity.

**Correct Order:** NaF > NaCl > NaBr > NaI (the order given in the question is correct)

### Step 3: Polarizing Power Order
**Given Order:** K⁺ < Ca²⁺ < Cd²⁺

**Explanation:**
- Polarizing power refers to the ability of a cation to distort the electron cloud of an anion.
- Cations with a higher charge and smaller size have greater polarizing power.
- Cd²⁺ has a pseudo noble gas configuration (18 electrons in the outer shell), which gives it a higher polarizing power compared to K⁺ and Ca²⁺.

**Correct Order:** Cd²⁺ > Ca²⁺ > K⁺ (the order given in the question is correct)

### Step 4: Polarizability Order
**Given Order:** S²⁻ < O²⁻ < F⁻

**Explanation:**
- Polarizability is the ability of an anion's electron cloud to be distorted by a cation.
- Larger anions are generally more polarizable.
- Among the given anions, S²⁻ is larger than O²⁻, which is larger than F⁻.

**Correct Order:** S²⁻ > O²⁻ > F⁻ (the order given in the question is incorrect)

### Summary of Correct Orders
1. **Lattice Energy:** LiF > NaF > KF > RbF (Incorrect in the question)
2. **Ionic Character:** NaF > NaCl > NaBr > NaI (Correct in the question)
3. **Polarizing Power:** Cd²⁺ > Ca²⁺ > K⁺ (Correct in the question)
4. **Polarizability:** S²⁻ > O²⁻ > F⁻ (Incorrect in the question)