By mixing ammonium chloride to potassium nitrite and heating, we get

Options

A. Ammonium nitrate
B. `KNH_4(NO_3)_2`
C. Nitrogen
D. Nitrogen dioxide

Explanation

To solve the question regarding the reaction between ammonium chloride and potassium nitrite upon heating, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Reactants**:
- Ammonium chloride (NH₄Cl)
- Potassium nitrite (KNO₂)

2. **Write the Chemical Reaction**:
- When ammonium chloride is mixed with potassium nitrite and heated, the reaction can be represented as:
\[ \text{NH}_4\text{Cl} + \text{KNO}_2 \rightarrow \text{KCl} + \text{N}_2 + \text{H}_2\text{O} \]

3. **Balancing the Reaction**:
- To ensure the reaction is balanced, we check the number of atoms on both sides:
- Left side:
- Nitrogen (N): 2 (1 from NH₄Cl and 1 from KNO₂)
- Hydrogen (H): 4 (from NH₄Cl)
- Chlorine (Cl): 1 (from NH₄Cl)
- Potassium (K): 1 (from KNO₂)
- Oxygen (O): 2 (from KNO₂)
- Right side:
- Nitrogen (N): 2 (from N₂)
- Hydrogen (H): 2 (from H₂O)
- Chlorine (Cl): 1 (from KCl)
- Potassium (K): 1 (from KCl)
- Oxygen (O): 1 (from H₂O)
- To balance the hydrogens, we adjust the water:
\[ \text{NH}_4\text{Cl} + \text{KNO}_2 \rightarrow \text{KCl} + \text{N}_2 + 2\text{H}_2\text{O} \]

4. **Final Balanced Equation**:
- The final balanced equation is:
\[ 2\text{NH}_4\text{Cl} + \text{KNO}_2 \rightarrow \text{KCl} + \text{N}_2 + 2\text{H}_2\text{O} \]

5. **Identify the Products**:
- From the balanced equation, we see that the products of the reaction are:
- Potassium chloride (KCl)
- Nitrogen gas (N₂)
- Water (H₂O)

6. **Conclusion**:
- Therefore, upon heating ammonium chloride with potassium nitrite, nitrogen gas is evolved along with potassium chloride and water.

### Final Answer:
By mixing ammonium chloride with potassium nitrite and heating, we get nitrogen gas (N₂) along with potassium chloride (KCl) and water (H₂O).

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