Which are not correct ?

Options

A. `Ge(OH)_2` is amphoteric
B. `SnCl_4` is more stable than ` SnCl_2`
C. Trisilylamine is pyramidal
D. `GeCl_4` in ` HCl` forms ` H_2[GeCl_6]`

Explanation

To determine which statements are not correct regarding the P-Block Group 14 elements (Carbon Family), we will analyze each option step by step.

### Step-by-Step Solution:

1. **Option A: "Sn and Pb are amphoteric."**
- **Analysis:** Amphoteric substances can react with both acids and bases. Tin (Sn) and Lead (Pb) oxides and hydroxides exhibit amphoteric behavior. Therefore, this statement is true.
- **Conclusion:** This option is correct.

2. **Option B: "SnCl4 is more stable than SnCl2."**
- **Analysis:** The stannic ion (Sn^4+) is more stable than the stannous ion (Sn^2+) due to the higher oxidation state being stabilized by the presence of more chlorine atoms in SnCl4. Thus, this statement is also true.
- **Conclusion:** This option is correct.

3. **Option C: "Trisilyl amine is pyramidal."**
- **Analysis:** Trisilyl amine has a nitrogen atom bonded to three silicon atoms. The presence of a lone pair on nitrogen typically suggests a pyramidal shape. However, in this case, the lone pair is delocalized into the d orbitals of silicon, leading to sp² hybridization and a trigonal planar shape instead. Therefore, this statement is false.
- **Conclusion:** This option is not correct.

4. **Option D: "GeCl4 in HCl forms H2GeCl6."**
- **Analysis:** Germanium (Ge) can expand its octet due to the availability of vacant d orbitals, allowing it to form hexa-coordinated complexes like H2GeCl6. This statement is true.
- **Conclusion:** This option is correct.

### Final Answer:
The statement that is not correct is **Option C: "Trisilyl amine is pyramidal."**

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