Gas obtained by heating a mixture of ammonium chloride and slaked lime is:

Options

A. `NO_2`
B. `N_2`
C. `N_2O`
D. `NH_3`

Answer

To solve the question regarding the gas obtained by heating a mixture of ammonium chloride and slaked lime, we can follow these steps:

### Step 1: Identify the reactants
The reactants in this scenario are:
- Ammonium chloride (NH4Cl)
- Slaked lime (calcium hydroxide, Ca(OH)2)

### Step 2: Write the chemical reaction
When ammonium chloride is heated with slaked lime, a chemical reaction occurs. The reaction can be represented as:
\[ \text{NH}_4\text{Cl} + \text{Ca(OH)}_2 \rightarrow \text{CaCl}_2 + \text{H}_2\text{O} + \text{NH}_3 \]

### Step 3: Identify the products
From the reaction, we can see that the products formed are:
- Calcium chloride (CaCl2)
- Water (H2O)
- Ammonia gas (NH3)

### Step 4: Determine the gas produced
Among the products, the gas that is produced is ammonia (NH3).

### Conclusion
Thus, the gas obtained by heating a mixture of ammonium chloride and slaked lime is ammonia (NH3).

### Final Answer
The correct option is D: NH3.

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