Can we detect oxygen in a compound by Lassaigne's test ?

Answer

**Step-by-Step Solution:**

1. **Understanding Lassaigne's Test**: Lassaigne's test is a qualitative analysis method used to detect the presence of certain elements in organic compounds. It primarily helps in identifying nitrogen, sulfur, and halogens.

2. **Elements Detected by Lassaigne's Test**: The test is specifically designed to detect:
- Nitrogen (N)
- Sulfur (S)
- Halogens (F, Cl, Br, I)

3. **Oxygen Detection**: Oxygen is not one of the elements that can be detected using Lassaigne's test. The test relies on the formation of specific salts or ionic compounds when sodium reacts with the elements present in the organic compound. Oxygen does not form such detectable compounds in this context.

4. **Conclusion**: Therefore, the answer to the question is that we cannot detect oxygen in a compound by Lassaigne's test.

**Final Answer**: No, we cannot detect oxygen in a compound by Lassaigne's test.

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