Which of the following compound is used in gun powder ?

Options

A. `LiNO_(3)`
B. `NaNO_(3)`
C. `Pb(NO_(3))_(2)`
D. `KNO_(3)`

Answer

To determine which compound is used in gunpowder, we can follow these steps:

### Step 1: Understand the Composition of Gunpowder
Gunpowder is a mixture that typically consists of three main components:
1. Sulfur
2. Charcoal
3. Potassium nitrate (KNO3)

### Step 2: Identify the Role of Each Component
- **Sulfur**: Acts as a fuel.
- **Charcoal**: Also acts as a fuel.
- **Potassium Nitrate (KNO3)**: Serves as an oxidizer, providing oxygen to facilitate combustion.

### Step 3: Recognize the Function of Gunpowder
Gunpowder is used as a propellant in firearms and rockets, and as a blasting agent in explosives. When ignited, it produces a large amount of heat and energy.

### Step 4: Analyze the Given Options
We need to evaluate the options provided to see which one contains the components of gunpowder:
1. **LiNO3** (Lithium nitrate) - Not used in gunpowder.
2. **NaNO3** (Sodium nitrate) - Not used in gunpowder.
3. **Pb(NO3)2** (Lead nitrate) - Not used in gunpowder.
4. **KNO3** (Potassium nitrate) - This is one of the components of gunpowder.

### Step 5: Conclusion
The correct answer is **KNO3**, as it is a key ingredient in gunpowder.

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