To solve the question of which ammonium compound does not produce ammonia (NH₃) upon heating, we will analyze each of the given options step by step.
### Step 1: Analyze Ammonium Nitrite (NH₄NO₂)
- When ammonium nitrite is heated, it decomposes to form nitrogen gas (N₂) and water vapor (H₂O).
- The reaction can be represented as:
\[
2 \, NH_4NO_2 \, \rightarrow \, N_2 \, + \, 2 \, H_2O
\]
- **Conclusion**: Ammonium nitrite does not produce ammonia upon heating.
### Step 2: Analyze Ammonium Carbonate (NH₄)₂CO₃
- When ammonium carbonate is heated, it decomposes to produce ammonia, carbon dioxide (CO₂), and water.
- The reaction can be represented as:
\[
(NH_4)_2CO_3 \, \rightarrow \, 2 \, NH_3 \, + \, CO_2 \, + \, H_2O
\]
- **Conclusion**: Ammonium carbonate does produce ammonia upon heating.
### Step 3: Analyze Ammonium Sulfate (NH₄)₂SO₄
- When ammonium sulfate is heated, it decomposes to form ammonia and sulfuric acid (H₂SO₄).
- The reaction can be represented as:
\[
(NH_4)_2SO_4 \, \rightarrow \, 2 \, NH_3 \, + \, H_2SO_4
\]
- **Conclusion**: Ammonium sulfate does produce ammonia upon heating.
### Step 4: Analyze Ammonium Chloride (NH₄Cl)
- When ammonium chloride is heated, it decomposes to produce ammonia and hydrogen chloride (HCl).
- The reaction can be represented as:
\[
NH_4Cl \, \rightarrow \, NH_3 \, + \, HCl
\]
- **Conclusion**: Ammonium chloride does produce ammonia upon heating.
### Final Conclusion
From the analysis above, the only ammonium compound that does not produce ammonia upon heating is **Ammonium Nitrite (NH₄NO₂)**.
### Answer
**Ammonium Nitrite (NH₄NO₂)** is the ammonium compound which on heating does not give NH₃.
