Question

In a fuel cell, electrical energy is produced by
(a) Reaction of hydrogen with oxygen
(c) Combustion of fuel in the absence of oxygen.
(b) Thermionic action
(d) None of these​

Answer 1

Answer:

a) In a fuel cell, electrical energy is produced by the reaction of hydrogen with oxygen.

Explanation:

• A fuel cell is an electrochemical device that turns chemical energy into electrical energy.
• The oxygen is reduced at the cathode and the hydrogen is oxidized at the anode in a hydrogen-oxygen fuel cell.
• When you combine these two reactions, you get hydrogen combustion, which produces a lot of heat.
• Direct hydrogen combustion is uncontrollable, although it can be regulated to some extent using an electrochemical cell.