In which of the following cell the energy of combustion of the reaction is directly converted into electricity?

Options

A. Lechlanche cell
B. Concentration cell
C. Fuel cell
D. Lead storage battery

Answer

To determine in which cell the energy of combustion of the reaction is directly converted into electricity, we will analyze the options provided.

### Step-by-Step Solution:

1. **Understanding Combustion**:
- Combustion is a chemical reaction where a substance (usually a fuel) reacts with oxygen to produce heat and light. In electrochemistry, we are interested in how this energy can be converted into electrical energy.

2. **Analyzing the Options**:
- **Leclanché Cell**:
- In this cell, zinc is oxidized at the anode, losing electrons, while ammonium ions react with manganese dioxide at the cathode. This process does not involve combustion; it is a redox reaction that generates electricity but not from combustion energy.
- **Concentration Cell**:
- A concentration cell generates electricity based on the difference in concentration of ions in two half-cells. It does not involve combustion energy; rather, it relies on the chemical potential difference.
- **Fuel Cell**:
- A fuel cell converts the chemical energy of a fuel (like hydrogen or carbon) directly into electricity through a reaction with oxygen. This process can be viewed as a combustion reaction, where the fuel reacts with oxygen to produce electricity, water, and heat.
- **Lead Storage Battery**:
- This is a type of rechargeable battery that stores electrical energy chemically and does not directly convert combustion energy into electricity. It involves redox reactions but not combustion.

3. **Conclusion**:
- Among the options, the **fuel cell** is the only one that directly converts the energy of combustion of the reaction into electricity. Therefore, the correct answer is **Fuel Cell (Option C)**.