What Is the Reaction at the Cathode in a Breathalyzer

question 151

Multiple Choice

What is the reaction at the cathode in a breathalyzer?

• A) Ethanol is oxidized to acetic acid.
• B) Acetic acid is reduced to ethanol.
• C) Oxygen is reduced.
• D) Hydrogen is oxidized.
• E) Ethanol is oxidized to acetaldehyde.

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Definitions:

Methane

A colorless, odorless flammable gas that is the simplest alkane, used as a fuel and in chemical synthesis.

Photosynthesis

The process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a byproduct.

Chloroplasts

Organelles found in plant and algal cells responsible for photosynthesis, the process by which light energy is converted to chemical energy in the form of glucose.

Photosynthesis

A biochemical process in plants, algae, and some bacteria that converts sunlight, water, and carbon dioxide into glucose and oxygen, utilizing chlorophyll.