Which of the following is incorrect statement?

Options

A. `GeX_4 (X= F, Cl , Br , I)` is more stable than `GeX_2`
B. `SnF_4` is ionic is nature
C. `PbF_4` is covalent in nature
D. `SiCl_4` is easily hydrolysed

Explanation

To determine which of the given statements is incorrect, we will analyze each statement one by one.

### Step 1: Analyze Statement 1
**Statement 1:** \( \text{GX}_4 \) is more stable than \( \text{GX}_2 \) (where \( \text{X} \) can be fluorine, chlorine, bromine, or iodine).

- **Analysis:** The statement is correct. The \( \text{GX}_4 \) compounds have fully filled orbitals, which makes them more stable compared to \( \text{GX}_2 \) compounds. Full and half-filled orbitals are known to provide extra stability due to lower energy configurations.

### Step 2: Analyze Statement 2
**Statement 2:** \( \text{SnF}_4 \) is ionic in nature.

- **Analysis:** This statement is also correct. \( \text{SnF}_4 \) is ionic because the fluorine atom is very small and has a high electronegativity, while the tin atom is larger. According to Fajans' rules, the large size of the tin atom and the small size of the fluorine atom lead to a significant ionic character in \( \text{SnF}_4 \).

### Step 3: Analyze Statement 3
**Statement 3:** \( \text{PbF}_4 \) is covalent in nature.

- **Analysis:** This statement is incorrect. \( \text{PbF}_4 \) is not covalent; rather, it is ionic. The lead atom is large, and the small fluorine atom creates a situation where the ionic character is favored according to Fajans' rules. Therefore, this statement is the incorrect one.

### Step 4: Analyze Statement 4
**Statement 4:** \( \text{SiCl}_4 \) is easily hydrolyzed.

- **Analysis:** This statement is correct. \( \text{SiCl}_4 \) is known to be hydrolyzed easily due to steric hindrance and the instability of the compound in the presence of water. The large size of chlorine atoms leads to steric hindrance, making hydrolysis favorable.

### Conclusion
After analyzing all four statements, we find that the incorrect statement is:

**Incorrect Statement:** \( \text{PbF}_4 \) is covalent in nature.

### Final Answer
The incorrect statement is: **\( \text{PbF}_4 \) is covalent in nature.**

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