Electrochemical Sensors Quiz

What do electrochemical sensors measure?

• Temperature of liquids

• Pressure of gases

• Concentration of chemicals

• Volume of liquids

What is the primary function of the working electrode?

• To measure the temperature

• To facilitate the chemical reaction of interest

• To allow current flow without affecting the system

• To maintain a constant potential

Which of the following is NOT a component of a two-electrode gas sensor?

• Working electrode

• Counter electrode

• Reference electrode

• Ion generator

What happens when carbon monoxide (CO) contacts the working electrode?

• It is absorbed without reaction

• It reduces the potential of the electrode

• It oxidizes to produce protons and electrons

• It cools the electrode

What is a significant advantage of electrochemical sensors?

• High cost compared to other technologies

• Specificity to particular gases

• Limited application range

• High power requirements

What is a disadvantage of electrochemical sensors?

• They are very expensive

• They have a long shelf life

• They can be affected by cross-sensitivity

• They are not specific to any gas

What is the typical shelf life of an electrochemical sensor?

• 1 to 3 years

• Indefinite

• 6 months to 1 year

• 2 to 5 years

In which application are electrochemical sensors used for cancer detection?

• Automotive

• Medical diagnostics

• Food monitoring

• Environmental monitoring

What is the role of the counter electrode?

• To oxidize the target gas

• To allow current flow without affecting the system

• To measure the temperature

• To maintain a constant potential

Which of the following gases is mentioned as a toxic gas in the text?

• Hydrogen

• Nitrogen

• Oxygen

• Carbon monoxide