Science & Technology2015
With reference to ‘fuel cells’ in which hydrogen-rich fuel and oxygen are used to generate electricity, consider the following statements:
- If pure hydrogen is used as a fuel, the fuel cell emits
- Fuel cells can be used for powering buildings and not
- Fuel cells produce electricity in the form of Alternating
Current (AC). Which of the statements given above is/are correct?
Explanation
The correct option is 1 only. Statement 1 is accurate because when pure hydrogen is utilized in fuel cells, the reaction with oxygen indeed produces water and heat as by-products, a clean process that distinguishes fuel cells from fossil fuels that emit pollutants. Statement 2 is incorrect as fuel cells are versatile and can power both large structures and small devices like laptops; technology advancements have enabled their integration into various applications. Statement 3 is also false because fuel cells generate electricity in the form of Direct Current (DC), which can then be converted to AC if needed.