Concentrated ore, calamine is heated to get metal oxide and the volatile impurities escapes away. This process is called

Options

A. Roasting
B. Calcination
C. Reduction
D. Oxidation

Answer

To solve the question regarding the heating of concentrated ore calamine to obtain metal oxide while volatile impurities escape, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Ore**: The question mentions "calamine," which is primarily composed of zinc carbonate (ZnCO3).

2. **Understand the Process**: The process described involves heating the ore to convert it into a metal oxide while allowing volatile impurities to escape.

3. **Determine the Type of Ore**: Since calamine is a carbonate ore, we need to consider the appropriate method for converting carbonates into oxides.

4. **Recall the Process for Carbonates**: The process used for converting carbonate ores to metal oxides is known as **calcination**. This involves heating the ore in the absence of air or in a limited supply of air.

5. **Chemical Reaction**: During calcination, zinc carbonate (ZnCO3) decomposes upon heating to form zinc oxide (ZnO) and carbon dioxide (CO2) gas. The reaction can be represented as:
\[ \text{ZnCO}_3 \, (s) \rightarrow \text{ZnO} \, (s) + \text{CO}_2 \, (g) \]

6. **Conclusion**: The process of heating calamine to obtain zinc oxide while allowing volatile impurities to escape is called **calcination**.

### Final Answer:
The process is called **calcination**.

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