Question

Which of the following statement is true regarding fuel cell?

1. Cathode Reaction of fuel cell O2 + 2H2O + 4e– → 4OH–

2. Anode Reaction of fuel cell 2H2 + 4OH– → 4H2O + 4e–

3. Water is used as an oxidizing agent.

1. Statement (i) and (ii) are true.
2. Statement (ii) and (iii) are true.
3. Statement (i) and (iii) are true.
4. All are true.

Answer 1

Correct Answer - Option 1 : Statement (i) and (ii) are true.

The correct answer is Statement (i) and (ii) are true.

• Fuel Cell:
  • A device that converts the energy of combustion of fields like hydrogen and methane directly into electrical energy.
  • It is an electrochemical reaction.
  • It requires a continuous input of fuel and an oxidizing agent which is oxygen.
  • Cathode Reaction of fuel cell 
    • O2 + 2H2O + 4e– → 4OH–
  • Anode Reaction of fuel cell
    • 2H2 + 4OH– → 4H2O + 4e–
  • Hence Statement (i) and (ii) are true while statement (iii) is false.
• Applications of fuel cell:
  • They are used to power many space expeditions including the Appolo space program.
  • Electrical vehicles.
  • Some military applications.