The reduction of an oxide by aluminium is called as Roasting. True/False

Options

A. Ellingham process
B. Goldschmidt's aluminothermite process
C. Kroll's process
D. Van Arkel process

Answer

**Step-by-Step Solution:**

1. **Understanding the Terms:**
- The question asks whether the reduction of an oxide by aluminum is called roasting.
- First, we need to clarify what "roasting" means in chemistry.

2. **Definition of Roasting:**
- Roasting is a process where metal sulfide ores are heated in the presence of excess oxygen.
- This process converts metal sulfides into metal oxides, not the reduction of oxides.

3. **Reduction of Oxides:**
- The reduction of an oxide by aluminum is a different process.
- This process is known as the aluminothermic reaction, which was developed by Goldschmidt.

4. **Example of Aluminothermic Reaction:**
- For instance, when iron(III) oxide (Fe2O3) is mixed with aluminum powder, aluminum displaces iron due to its higher reactivity.
- The reaction can be represented as:
\[ 2Fe_2O_3 + 3Al \rightarrow 4Fe + 3Al_2O_3 \]
- This reaction is highly exothermic, releasing a significant amount of heat.

5. **Conclusion:**
- Since roasting refers to the conversion of metal sulfides to oxides and not the reduction of oxides by aluminum, the statement provided in the question is **False**.

**Final Answer:**
The reduction of an oxide by aluminum is called roasting. **False.**

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