Lead nitrate of heating gives lead oxide, nitrogen dioxide and oxygen. This reaction is known as

Options

A. Combustion
B. Combination
C. Displacement
D. Decomposition

Explanation

To solve the question regarding the decomposition of lead nitrate upon heating, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Reaction**: The reaction involves the thermal decomposition of lead nitrate (Pb(NO3)2). When heated, lead nitrate breaks down into lead oxide (PbO), nitrogen dioxide (NO2), and oxygen (O2).

2. **Write the Chemical Equation**: The decomposition reaction can be represented by the following balanced chemical equation:
\[ 2 \text{Pb(NO}_3\text{)}_2 \rightarrow 2 \text{PbO} + 4 \text{NO}_2 + \text{O}_2 \]

3. **Classify the Reaction**: This type of reaction is classified as a **decomposition reaction** because a single compound (lead nitrate) breaks down into two or more simpler substances (lead oxide, nitrogen dioxide, and oxygen).

4. **Conclusion**: Therefore, the reaction of lead nitrate upon heating is known as a **decomposition reaction**.