The most important copper oxide containing minerals are azurite `{Cu_(3)(OH)_(2)(CO_(3))_(2)}`, malachite `{Cu_(2)(OH)_(2)(CO_(3))}`, cuprite `(Cu_(2)O)`, tenorite `(CuO)`. Extraction of copper from these low grade ores involves leaching followed by reduction
Malachite `("leached")/("with bacteria") ("solution")`
`Cu` can be extracted from solution on treatment with:

Options

A. `Ag`
B. `FeO`
C. `H_(2)`
D. `H_(2)SO_(4)`

Explanation

To solve the problem of extracting copper from the leached solution of malachite, we will follow these steps:

### Step 1: Understand the leaching process
Leaching is a process where the ore is treated with a solution, often involving bacteria, to dissolve the metal ions. In this case, malachite `{Cu_(2)(OH)_(2)(CO_(3))}` is leached to produce a solution containing copper ions, specifically `Cu^(2+)`.

**Hint:** Leaching helps in separating metal ions from their ores using a suitable solvent or solution.

### Step 2: Identify the copper ions in solution
After leaching, the solution contains copper ions in the form of `Cu^(2+)`. This is the form of copper that we will be working with to extract the metal.

**Hint:** The ions present in the solution after leaching are crucial for determining the extraction method.

### Step 3: Analyze the options for copper extraction
We need to evaluate the options provided to see which one can effectively reduce `Cu^(2+)` ions to metallic copper `Cu`. The options are:
- A) Silver
- B) FeO
- C) Hydrogen
- D) H2SO4

**Hint:** Look for a reducing agent that can convert `Cu^(2+)` ions into solid copper.

### Step 4: Evaluate each option
- **Option A: Silver** - Silver is less reactive than copper and cannot displace copper from its ions.
- **Option B: FeO** - Iron(II) oxide (FeO) does not provide the necessary reducing conditions to convert `Cu^(2+)` to copper.
- **Option C: Hydrogen** - Hydrogen can reduce `Cu^(2+)` ions to copper metal according to the reaction:
\[ Cu^{2+} + H_2 \rightarrow Cu + 2H^+ \]
- **Option D: H2SO4** - Sulfuric acid does not reduce `Cu^(2+)` to copper; it can only provide sulfate ions.

**Hint:** Consider the reactivity series of metals to determine which can effectively reduce copper ions.

### Step 5: Conclusion
The only viable option that can reduce `Cu^(2+)` ions to copper metal is **Option C: Hydrogen**. Therefore, hydrogen gas is the correct answer for extracting copper from the leached solution.

**Final Answer:** Copper can be extracted from the solution on treatment with **Hydrogen (Option C)**.