Which one of the following ores is known as Malachite:

Options

A. `Cu_(2)S`
B. `Cu_(2)O`
C. `Cu(OH)_(2).CuCO_(3)`
D. `CuFeS_(2)`

Answer

To determine which ore is known as Malachite, we need to analyze the options provided and identify the correct chemical formula associated with Malachite.

### Step-by-Step Solution:

1. **Identify Malachite**:
- Malachite is a mineral ore primarily composed of copper. It is important to know its chemical composition to answer the question correctly.

2. **Chemical Formula of Malachite**:
- The chemical formula for Malachite is \( \text{Cu}_2\text{CO}_3(\text{OH})_2 \). This indicates that Malachite is a copper carbonate hydroxide.

3. **Examine the Options**:
- The options given are:
- A) \( \text{Cu}_2\text{O} \)
- B) \( \text{Cu(OH)}_2 \)
- C) \( \text{Cu}_2\text{CO}_3(\text{OH})_2 \)
- D) \( \text{CuFeS}_2 \)

4. **Match the Formula**:
- Now, we need to match the formula of Malachite with the options:
- A) \( \text{Cu}_2\text{O} \) - This is copper(I) oxide, not Malachite.
- B) \( \text{Cu(OH)}_2 \) - This is copper(II) hydroxide, not Malachite.
- C) \( \text{Cu}_2\text{CO}_3(\text{OH})_2 \) - This matches the formula for Malachite.
- D) \( \text{CuFeS}_2 \) - This is chalcopyrite, not Malachite.

5. **Conclusion**:
- The correct answer is option C) \( \text{Cu}_2\text{CO}_3(\text{OH})_2 \), which is known as Malachite.

### Final Answer:
C) \( \text{Cu}_2\text{CO}_3(\text{OH})_2 \)