Question

What are fuel cells? State Two advantages of hydrogen-oxygen fuel cell over ordinary cell.

Hint:

Fuel cells are highly efficient and environmentally friendly as they produce water instead of harmful emissions.

Answer 1

Step 1: Definition of Fuel Cells: Fuel cells are electrochemical devices that convert chemical energy into electrical energy through a redox reaction between fuel (e.g., hydrogen) and an oxidizing agent (e.g., oxygen). 

Step 2: Advantages of Hydrogen-Oxygen Fuel Cell: 1. Higher Efficiency: Fuel cells have higher efficiency compared to conventional electrochemical cells. 2. Eco-friendly: Produces only water as a byproduct, making it environmentally friendly.