`NH_4Cl, NH_4NO_3 and (NH_4)_2CO_3` on heating gives `NH_3` gas.
True/False

Answer

To determine whether the statement "NH₄Cl, NH₄NO₃, and (NH₄)₂CO₃ on heating gives NH₃ gas" is true or false, we will analyze each compound separately.

### Step 1: Analyze NH₄Cl (Ammonium Chloride)
- When ammonium chloride (NH₄Cl) is heated, it decomposes to form ammonia gas (NH₃) and hydrogen chloride (HCl).

**Reaction:**
\[ NH_4Cl \rightarrow NH_3 + HCl \]

**Hint:** Look for the products formed during the decomposition of ammonium chloride.

### Step 2: Analyze NH₄NO₃ (Ammonium Nitrate)
- When ammonium nitrate (NH₄NO₃) is heated, it decomposes to form nitrous oxide (N₂O) and water (H₂O), but it does not produce ammonia gas (NH₃).

**Reaction:**
\[ NH_4NO_3 \rightarrow N_2O + 2H_2O \]

**Hint:** Check the products of ammonium nitrate decomposition to see if ammonia is formed.

### Step 3: Analyze (NH₄)₂CO₃ (Ammonium Carbonate)
- When ammonium carbonate ((NH₄)₂CO₃) is heated, it decomposes to produce ammonia gas (NH₃), water (H₂O), and carbon dioxide (CO₂).

**Reaction:**
\[ (NH_4)_2CO_3 \rightarrow 2NH_3 + H_2O + CO_2 \]

**Hint:** Look for the decomposition products of ammonium carbonate to confirm if ammonia is released.

### Conclusion
- From the analysis:
- NH₄Cl gives NH₃.
- NH₄NO₃ does not give NH₃.
- (NH₄)₂CO₃ gives NH₃.

Thus, the statement "NH₄Cl, NH₄NO₃, and (NH₄)₂CO₃ on heating gives NH₃ gas" is **False** because only NH₄Cl and (NH₄)₂CO₃ produce ammonia gas upon heating, while NH₄NO₃ does not.

### Final Answer: False