Question

Which of the following statements is true regarding a primary cell?

(a) The electrode reactions can be reversed

(b) It can be recharged

(c) An example of a primary cell is a mercury cell

(d) An example of a primary cell is a nickel-cadmium storage cell

The question was asked in an online quiz.

My doubt stems from Electrochemistry in division Electrochemistry of Chemistry – Class 12

Answer 1

Correct choice is (c) An example of a primary cell is a mercury cell

To elaborate: A primary cell is one in which the electrode reactions occur only once and cannot be reversed by applying electrical energy. Therefore, primary cells cannot be recharged. A mercury cell is an example of a primary cell, whereas a nickel-cadmium storage cell is an example of a secondary cell.