Misch metal is

Options

A. An alloy of aluminium
B. A mixture of chromium and lead chromate
C. An alloy of lanthanoid metals
D. An alloy of copper

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the composition of Misch metal and what it is primarily used for.

2. **Identifying the Options**: The options provided are:
- An alloy of aluminum
- A mixture of chromium and lead chromate
- An alloy of lanthanide metals
- An alloy of copper

3. **Analyzing the Composition of Misch Metal**: Misch metal is known to be a mixture that primarily consists of various lanthanide metals. The typical composition includes:
- 50% Cerium
- 25% Lanthanum
- 15% Neodymium
- 10% Other rare earth metals

4. **Understanding the Use of Misch Metal**: Misch metal is commonly used in the production of flint, which is a spark-producing agent. It is often alloyed with iron to create flint for cigarette lighters.

5. **Conclusion**: Based on the analysis, Misch metal is best described as an alloy of lanthanide metals.

**Final Answer**: Misch metal is an alloy of lanthanide metals.

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