Which of the following statement is true regarding fuel cell?

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

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

iii. Water is used as an oxidizing agent.

Question

Question

Answer 1

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.