In most fuel cell systems, hydrogen is passed over the ________blank.Multiple Choiceoxygenanodeelectrolytecathode

Answer Breakdown

The question requires identifying the correct term that completes the statement about hydrogen in fuel cell systems.

1. Identify the Context: The sentence refers to a process within fuel cell systems where hydrogen plays a crucial role.
2. Understanding Fuel Cells: In a typical fuel cell, hydrogen is supplied to one electrode, while oxygen (often from the air) is provided to another electrode.

Relevant Concepts

• Electrodes in Fuel Cells: Fuel cells consist of two electrodes, the anode and the cathode, separated by an electrolyte. At the anode, hydrogen is oxidized, releasing electrons, while at the cathode, oxygen is reduced.

Analysis and Detail

Now, let's analyze the choices:

1. Oxygen: This is not correct as hydrogen does not get passed over oxygen.
2. Anode: Hydrogen is indeed passed over the anode, which is where the oxidation reaction occurs.
3. Electrolyte: The electrolyte facilitates ion exchange but does not serve as a surface where hydrogen is passed.
4. Cathode: Hydrogen is not passed over the cathode; rather, at the cathode, oxygen is reduced using the electrons produced from the anode.

Verify and Summarize

From the analysis above, the only logical completion of the statement based on the operational principles of a hydrogen fuel cell is to say that hydrogen is passed over the anode.

Final Answer

Hydrogen is passed over the anode.