Among the following oxides, how many of them are amphoteric oxides ?
(a) `B_(2)O_(3)` , (b) `Al_(2)O_(3)` , (c ) `CaO` , (d) `ZnO`
(e) `Ga_(2)O_(3)` , (f) `SnO_(2)` , (g) `PbO_(2)` , (h) `BeO`
(i) `CuO` , (j) `Fe_(2)O_(3)`

Explanation

To determine how many of the given oxides are amphoteric, we will analyze each oxide based on its chemical behavior with acids and bases. Amphoteric oxides can react with both acids and bases.

### Step-by-Step Solution:

1. **Identify the Oxides**: The oxides provided are:
- (a) `B2O3`
- (b) `Al2O3`
- (c) `CaO`
- (d) `ZnO`
- (e) `Ga2O3`
- (f) `SnO2`
- (g) `PbO2`
- (h) `BeO`
- (i) `CuO`
- (j) `Fe2O3`

2. **Analyze Each Oxide**:
- **(a) `B2O3`**: This is an acidic oxide as it reacts with bases to form borates.
- **(b) `Al2O3`**: This is an amphoteric oxide as it reacts with both acids (forming AlCl3 with HCl) and bases (forming sodium aluminate with NaOH).
- **(c) `CaO`**: This is a basic oxide as it reacts with acids.
- **(d) `ZnO`**: This is an amphoteric oxide as it reacts with both acids (forming ZnCl2 with HCl) and bases (forming sodium zincate with NaOH).
- **(e) `Ga2O3`**: This is an amphoteric oxide as it can react with both acids and bases.
- **(f) `SnO2`**: This is also an amphoteric oxide as it reacts with both acids and bases.
- **(g) `PbO2`**: This is an amphoteric oxide as it can react with both acids and bases.
- **(h) `BeO`**: This is an amphoteric oxide as it reacts with both acids and bases.
- **(i) `CuO`**: This is a basic oxide as it primarily reacts with acids.
- **(j) `Fe2O3`**: This is a basic oxide as it reacts with acids.

3. **Count the Amphoteric Oxides**: From the analysis:
- Amphoteric oxides identified: `Al2O3`, `ZnO`, `Ga2O3`, `SnO2`, `PbO2`, `BeO`.
- Total count of amphoteric oxides = 6.

### Final Answer:
The number of amphoteric oxides among the given options is **6**.