Which of the following statements are false.

Options

A. `PbO, PbO_(2)` are amphoteric, `CO` is neutral and `CO_(2),SiO_(2)` are acidic.
B. Carbon shows oxidation number from `-4` to `+4` in its various compounds.
C. `B_(2)O_(3)` is acidic, `SnO` is amphoteric and `Ga_(2)O_(3), GeO_(2)` are acidic.
D. Boron is non metal, `Ge, Ga` are metalloids and `Pb, Sn`, In are metals.

Explanation

To determine which statements are false, we will analyze each statement one by one based on our knowledge of the properties of the compounds and elements mentioned.

### Step 1: Analyze Statement A
**Statement A:** PbO and PbO2 are amphoteric, CO is neutral, and CO2 and SiO2 are acidic.

- **PbO and PbO2:** Lead oxides (PbO and PbO2) can behave as amphoteric oxides. This means they can react with both acids and bases.
- **CO (Carbon Monoxide):** CO is indeed a neutral oxide, as it does not exhibit acidic or basic properties.
- **CO2 (Carbon Dioxide) and SiO2 (Silicon Dioxide):** Both CO2 and SiO2 are acidic oxides. CO2 is produced from non-metals and reacts with water to form carbonic acid, while SiO2 can react with bases.

**Conclusion for Statement A:** This statement is true.

### Step 2: Analyze Statement B
**Statement B:** Carbon shows oxidation numbers from -4 to +4 in its various compounds.

- Carbon can indeed exhibit oxidation states ranging from -4 (as in CH4) to +4 (as in CO2). The oxidation states are due to the four valence electrons in carbon's outer shell, allowing it to either gain or lose electrons.

**Conclusion for Statement B:** This statement is true.

### Step 3: Analyze Statement C
**Statement C:** B2O3 is acidic, SnO is amphoteric, and Ga2O3 and GeO2 are acidic.

- **B2O3 (Boron Trioxide):** This is indeed an acidic oxide.
- **SnO (Tin(II) Oxide):** SnO is amphoteric, as it can react with both acids and bases.
- **Ga2O3 (Gallium Oxide) and GeO2 (Germanium Dioxide):** Ga2O3 is typically amphoteric, not strictly acidic. GeO2 can be considered acidic, but Ga2O3 does not fit the acidic classification.

**Conclusion for Statement C:** This statement is false because Ga2O3 is not strictly acidic.

### Step 4: Analyze Statement D
**Statement D:** Boron is a nonmetal; gallium and germanium are metalloids.

- **Boron:** Boron is classified as a metalloid, not a nonmetal.
- **Gallium and Germanium:** Both are indeed classified as metalloids.

**Conclusion for Statement D:** This statement is false because it incorrectly classifies boron.

### Final Conclusion
The false statements are:
- **Statement C:** Ga2O3 is incorrectly classified as acidic.
- **Statement D:** Boron is incorrectly classified as a nonmetal.

### Answer:
The false statements are C and D.

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