Question

Polarographic and galvanic cells are two types of electrochemical cells used for oxygen analysis. Which of the following statements is true regarding the differences between polarographic and galvanic cells?

A) Galvanic cells are sold as either reusable or disposable.
B) Polarographic cells should be disposed of similarly to automotive batteries.
C) Polarographic sensors are highly accurate but can be slow to respond to rapid changes in gas composition.
D) Polarographic analyzers are thought to be more reliable than galvanic analyzers.
E) None of the above (statements A-D are all false).

Answer 1

Among the given statements, the true difference between polarographic and galvanic cells for oxygen analysis is that polarographic sensors are highly accurate but can be slow to respond to rapid changes in gas composition(option c).

Step-by-step explanation:

Polarographic and galvanic cells are two types of electrochemical cells used for oxygen analysis. Among the statements provided regarding differences between these cells:

• Statement A is false. While some galvanic cells can be disposable or reusable, this is not a distinguishing feature compared to polarographic cells.
• Statement B is false. Polarographic cells do not have the same disposal requirements as automotive batteries.
• Statement C is true. Polarographic sensors are highly accurate and are known for their ability to provide precise measurements of oxygen, though they might not be as quick to respond to changes in gas composition as other technologies.
• Statement D is false. There is no definitive evidence to suggest polarographic analyzers are more reliable than galvanic analyzers.

Thus, the correct choice is option C: Polarographic sensors are highly accurate but can be slow to respond to rapid changes in gas composition.