Question

Which of the following statements is true for fuel cells ?

• A. They are more efficient
• B. They are free from pollution
• C. They run till reactants are active
• D. All of the above

Answer 1

Answer: (D)

All of the above

The fuel cells are more efficient. The energy efficiency of fuel cells is around 70 %. The only reaction product is water. Hence the fuel cells are free from pollution. The reactants are continuously supplied from external source. Hence fuel cells run till reactants are active.