Incorrect statement about Ge is

Options

A. `GeO_(2)` is weakly acidic
B. `Ge(OH)_(2)` is a amphoteric
C. `GeCl_(2)` is more stable than `GeCl_(4)`
D. `Ge-Ge` bond energy is lesser than that of `Si-Si`

Explanation

To solve the question regarding the incorrect statement about germanium (Ge), we will analyze each statement one by one and determine which one is incorrect.

### Step-by-Step Solution:

1. **Identify the Group of Germanium**:
- Germanium (Ge) belongs to Group 14 of the periodic table, which is also known as the carbon family. The elements in this group include carbon (C), silicon (Si), germanium (Ge), tin (Sn), and lead (Pb).

**Hint**: Remember the group number and the elements it contains.

2. **Evaluate the First Statement**:
- The first statement claims that GeO2 (germanium dioxide) is weakly acidic. This statement is true. GeO2 can react with water to form H4GeO4, which is weakly acidic.

**Hint**: Consider the acidic nature of oxides in Group 14.

3. **Evaluate the Second Statement**:
- The second statement states that Ge(OH)2 (germanium hydroxide) is amphoteric. This is also true. Amphoteric substances can react with both acids and bases, and germanium hydroxide exhibits this behavior.

**Hint**: Recall the definition of amphoteric substances.

4. **Evaluate the Third Statement**:
- The third statement mentions that GeCl2 (germanium dichloride) is more stable than GeCl4 (germanium tetrachloride). This statement is incorrect. In the carbon family, the +4 oxidation state (as in GeCl4) is generally more stable than the +2 oxidation state (as in GeCl2) due to the inert pair effect.

**Hint**: Consider the stability of oxidation states in Group 14 elements.

5. **Evaluate the Fourth Statement**:
- The fourth statement claims that the Ge-Ge bond is weaker than the Si-Si bond. This statement is true. As you move down the group, bond energies decrease due to increasing atomic size, which leads to weaker bonds.

**Hint**: Think about how bond strength changes down a group in the periodic table.

### Conclusion:
Based on the evaluations, the incorrect statement about germanium is that **GeCl2 is more stable than GeCl4**. Therefore, the answer is:

**Answer**: GeCl2 is more stable than GeCl4 (this statement is incorrect).