Unit 3 AOS 2 - Innovations in Energy Storage and Production (4A)

What is the primary function of a rechargeable (secondary) cell when it is discharging?

• It acts as an electrolytic cell.

• It acts as a galvanic cell.

• It stores electrical energy.

• It converts electrical energy into chemical energy.

During the recharging process of a secondary cell, what is the role of the cell?

• It acts as a galvanic cell.

• It acts as an electrolytic cell.

• It releases energy.

• It remains inactive.

Which of the following conditions is necessary for the reversal of cell reactions in a rechargeable cell?

• High temperature

• Application of an external voltage

• Low pressure

• Absence of an electrolyte

In a galvanic cell, what is the polarity of the anode?

• Positive

• Negative

• Neutral

• Variable

In an electrolytic cell, what is the polarity of the cathode?

• Positive

• Negative

• Neutral

• Variable

Which method is used to produce 'green' hydrogen using solar energy?

• Combustion

• Polymer electrolyte membrane electrolysis

• Nuclear fission

• Steam reforming

What is the main advantage of using wind energy for polymer electrolyte membrane electrolysis?

• It is more efficient than solar energy.

• It is a renewable energy source.

• It requires less maintenance.

• It produces more hydrogen.

Which catalyst system is used in artificial photosynthesis for water oxidation?

• Platinum catalyst

• Water oxidation and proton reduction catalyst

• Nickel catalyst

• Iron catalyst

What is the chemical equation for the production of hydrogen gas in acidic conditions using electrolysis?

According to Faraday’s First Law of Electrolysis, the mass of a substance deposited at an electrode is directly proportional to:

• The current and time

• The voltage and resistance

• The temperature and pressure

• The concentration and volume