Which of the following compounds does give `N_(2)` on heating ?

Options

A. `NH_(4)NO_(2)`
B. `(NH_(4))_2SO_(4)`
C. `NaN_(3)`
D. Both (A) and ( C)

Answer

To determine which of the given compounds produces nitrogen gas (N₂) upon heating, we will analyze each compound step by step.

### Step 1: Analyze the first compound, NH₄NO₂ (Ammonium nitrite).
- When ammonium nitrite is heated, it decomposes according to the following reaction:
\[ 2 NH_4NO_2 \rightarrow N_2 + 4 H_2O \]
- This reaction shows that nitrogen gas (N₂) is produced along with water (H₂O).

### Step 2: Analyze the second compound, (NH₄)₂SO₄ (Ammonium sulfate).
- When ammonium sulfate is heated, it decomposes as follows:
\[ (NH_4)_2SO_4 \rightarrow 2 NH_3 + H_2SO_4 \]
- In this reaction, ammonia (NH₃) and sulfuric acid (H₂SO₄) are produced, but nitrogen gas (N₂) is not formed.

### Step 3: Analyze the third compound, NaN₃ (Sodium azide).
- When sodium azide is heated, it decomposes according to the reaction:
\[ 2 NaN_3 \rightarrow 2 Na + 3 N_2 \]
- This reaction indicates that nitrogen gas (N₂) is produced.

### Conclusion:
From the analysis:
- **NH₄NO₂** produces nitrogen gas (N₂) upon heating.
- **(NH₄)₂SO₄** does not produce nitrogen gas upon heating.
- **NaN₃** also produces nitrogen gas (N₂) upon heating.

Thus, the compounds that give nitrogen gas on heating are **NH₄NO₂** and **NaN₃**.

### Final Answer:
The compounds that give N₂ on heating are **NH₄NO₂** and **NaN₃**.

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