Magnesium powder burns in air to give :

Options

A. `Mg(NO_(3))_(2)` and `Mg_(3)N_(2)`
B. `MgO` and `Mg_(3)N_(2)`
C. `MgO` only
D. `MgO` and `Mg(NO_(3))_(2)`

Answer

To solve the question "Magnesium powder burns in air to give:", we need to analyze the reaction of magnesium with the components of air, primarily oxygen and nitrogen.

### Step-by-Step Solution:

1. **Identify the Components of Air**:
- Air is primarily composed of nitrogen (approximately 78%) and oxygen (approximately 21%).

2. **Reaction of Magnesium with Oxygen**:
- When magnesium burns in the presence of oxygen, it reacts to form magnesium oxide (MgO). The reaction can be represented as:
\[ 2Mg + O_2 \rightarrow 2MgO \]

3. **Reaction of Magnesium with Nitrogen**:
- Magnesium can also react with nitrogen when burned in air, producing magnesium nitride (Mg3N2). The reaction can be represented as:
\[ 3Mg + N_2 \rightarrow Mg_3N_2 \]

4. **Products Formed**:
- Therefore, when magnesium powder burns in air, it produces both magnesium oxide (MgO) and magnesium nitride (Mg3N2).

5. **Conclusion**:
- The final answer to the question is that magnesium powder burns in air to give magnesium oxide and magnesium nitride.

### Final Answer:
Magnesium powder burns in air to give magnesium oxide (MgO) and magnesium nitride (Mg3N2).

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