The common impurities in bauxite are
(i) `Fe_(2)O_(3)`
(ii) `SiO_(2)`
(iii) `CuO`
(iv) `ZnO`

Options

A. `1, 3`
B. `2 ,3`
C. `1 ,2`
D. `2 ,4`

Answer

To determine the common impurities found in bauxite, we need to analyze the composition of bauxite ore. Bauxite is primarily an aluminum ore and is generally represented by the formula Al₂O₃·xH₂O, where x can vary.

### Step-by-Step Solution:

1. **Identify the Composition of Bauxite**:
- Bauxite is mainly composed of aluminum oxide (Al₂O₃) along with water (H₂O). The presence of impurities is common in natural ores.

2. **List Common Impurities**:
- The common impurities found in bauxite include:
- Silicon dioxide (SiO₂)
- Iron(III) oxide (Fe₂O₃)
- Titanium dioxide (TiO₂)

3. **Analyze the Given Options**:
- The question provides four options for common impurities:
- (i) Fe₂O₃
- (ii) SiO₂
- (iii) CuO
- (iv) ZnO

4. **Evaluate Each Option**:
- (i) Fe₂O₃: This is a common impurity in bauxite.
- (ii) SiO₂: This is also a common impurity in bauxite.
- (iii) CuO: This is not typically found as an impurity in bauxite.
- (iv) ZnO: This is not a common impurity in bauxite.

5. **Conclusion**:
- The common impurities in bauxite are Fe₂O₃ and SiO₂. Therefore, the correct options are (i) and (ii).

### Final Answer:
The common impurities in bauxite are (i) Fe₂O₃ and (ii) SiO₂.

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