Hydrogen-Oxygen Fuel Cells Quiz

What is the primary reaction in a hydrogen-oxygen fuel cell?

• Hydrogen combusts with oxygen to produce carbon dioxide.

• Hydrogen reacts with oxygen to produce water and electrical energy.

• Oxygen reacts with carbon to form carbon monoxide.

• Hydrogen reacts with nitrogen to form ammonia.

What is the role of the electrolyte in a hydrogen-oxygen fuel cell?

• To transfer electrons directly between electrodes.

• To facilitate the movement of ions between the anode and cathode.

• To provide a source of hydrogen gas.

• To produce water as a byproduct.

What material is commonly used as the electrolyte in hydrogen-oxygen fuel cells?

• Sulfuric acid.

• Potassium hydroxide.

• Sodium chloride.

• Hydrochloric acid.

What is the primary function of the catalyst in the electrodes?

• To store hydrogen and oxygen gases.

• To accelerate the chemical reactions.

• To increase the storage capacity of the cell.

• To prevent oxidation of the electrodes.

What is the primary reaction occurring at the cathode of the fuel cell?

• Oxygen is oxidized to form oxygen ions.

• Oxygen reacts with hydrogen ions and electrons to produce water.

• Hydrogen ions are reduced to form hydrogen gas.

• Water molecules are broken down into hydrogen and oxygen.

What is the equation for the cathode reaction in a hydrogen-oxygen fuel cell?

• H2 → 2H+ + 2e−

• O2 + 4H+ + 4e− → 2H2O

• 2H2O → 4H+ + O2 + 4e−

• H2 + O2 → H2O

Which of the following best describes the overall reaction in a hydrogen-oxygen fuel cell?

• 2H2 + O2 → 2H2O

• 2H2O → 2H2 + O2

• H2 + O2 → H2O

• 4H+ + 4e− + O2 → 2H2O

What happens to hydrogen at the anode?

• It is reduced to form water.

• It is oxidized to produce hydrogen ions and electrons.

• It reacts with oxygen to form hydroxide ions.

• It undergoes combustion to release energy.

What is the primary product formed at the cathode?

• Carbon dioxide.

• Oxygen gas.

• Water.

• Hydrogen gas.

Fill in the blank: In a hydrogen-oxygen fuel cell, the overall reaction is ______.

• 2H2 + O2 → 2H2O

• 2H2O → 2H2 + O2

• H2 + O2 → H2O

• 4H+ + 4e− + O2 → 2H2O