Extraction of Zinc from zinc blende is achieved by Roasting followed by self-reduction. True/False

Explanation

To determine whether the statement "Extraction of Zinc from zinc blende is achieved by Roasting followed by self-reduction" is true or false, we can analyze the extraction process of zinc step by step.

### Step 1: Identify the Ore
Zinc blende, also known as zinc sulfide (ZnS), is the primary ore of zinc. The first step in the extraction process involves understanding the nature of this ore.

**Hint:** Know the chemical composition of zinc blende.

### Step 2: Roasting Process
The extraction of zinc from zinc blende begins with roasting. During roasting, zinc sulfide is heated in the presence of excess oxygen. This process converts the sulfide ore into zinc oxide (ZnO) and sulfur dioxide (SO₂).

**Chemical Reaction:**
\[ 2 \text{ZnS} + 3 \text{O}_2 \rightarrow 2 \text{ZnO} + 2 \text{SO}_2 \]

**Hint:** Roasting involves converting sulfide ores to oxides by oxidation.

### Step 3: Reduction of Zinc Oxide
After obtaining zinc oxide through roasting, the next step is to reduce zinc oxide to metallic zinc. This is typically done using carbon as a reducing agent. The reaction occurs in a blast furnace at high temperatures (around 1270 K).

**Chemical Reaction:**
\[ \text{ZnO} + \text{C} \rightarrow \text{Zn} + \text{CO} \]

**Hint:** The reduction process involves using a strong reducing agent like carbon.

### Step 4: Understanding Self-Reduction
Self-reduction refers to a process where the ore itself reduces to the metal without the need for an external reducing agent. This process is applicable to metals that are less electropositive, such as lead, copper, tin, or mercury. Zinc, being more electropositive, does not undergo self-reduction.

**Hint:** Self-reduction is not applicable to more electropositive metals like zinc.

### Conclusion
Based on the analysis, the statement "Extraction of Zinc from zinc blende is achieved by Roasting followed by self-reduction" is **False**. The extraction involves roasting followed by reduction with carbon, not self-reduction.

**Final Answer:** False