Zinc Air Cell Reactions and Effects

The video tutorial discusses the behavior of a zinc air cell, focusing on how its mass changes during operation and how its cell potential is affected by altitude. Initially, the mass of the cell increases as oxygen from the air is incorporated into the zinc to form zinc oxide. The tutorial then explains that at higher altitudes, where air pressure is lower, the cell potential decreases due to reduced oxygen availability, which affects the reaction rate.

What happens to the mass of a zinc air cell as it operates?

• It fluctuates.

• It remains the same.

• It decreases.

• It increases.

Where does the oxygen that reacts with zinc in a zinc air cell come from?

• The electrolyte.

• The zinc.

• The air.

• The cell itself.

What is formed when zinc reacts with oxygen in a zinc air cell?

• Zinc sulfate

• Zinc oxide

• Zinc chloride

• Zinc nitrate

How does lower air pressure at higher elevations affect the cell potential of a zinc air cell?

• Fluctuates the cell potential

• Increases the cell potential

• Decreases the cell potential

• Keeps the cell potential the same

What happens to the partial pressure of oxygen at higher elevations?

• It decreases.

• It becomes zero.

• It increases.

• It remains constant.

Why does the cell potential decrease at higher elevations?

• More oxygen is available.

• Less oxygen is available.

• More zinc is available.

• Less zinc is available.

What is the role of oxygen in the zinc air cell reaction?

• It is a product.

• It is an inhibitor.

• It is a reactant.

• It acts as a catalyst.

What would happen to the zinc air cell reaction if taken to space?

• The reaction would slow down.

• The reaction would stop.

• The reaction would speed up.

• The reaction would remain unchanged.

What is the effect of lower oxygen concentration on the zinc air cell reaction?

• It reverses the reaction.

• It has no effect on the reaction.

• It decelerates the reaction.

• It accelerates the reaction.

What is the main factor affecting the cell potential at different elevations?

• Humidity

• Zinc purity

• Temperature

• Oxygen availability