Question

Fill in the blanks by choosing the appropriate word(s) from those given in the brackets:

[+2, ethane, tetrahedral, square planar, zero, dry cell, nickel-cadmium cell, propane, Wolff-Kishner, Stephen, completely filled, incompletely filled, paramagnetic, diamagnetic]

______ is an example of a primary cell but ______ is an example of a secondary cell.

Answer 1

Dry cell is an example of a primary cell but nickel-cadmium cell is an example of a secondary cell.

Explanation:

• A primary cell (like a dry cell) is a galvanic cell designed to be used once and then discarded, as the electrochemical reaction is generally not reversible.
• A secondary cell (like a nickel-cadmium cell, often called a NiCad cell) is a rechargeable battery, meaning its chemical reaction can be reversed by applying an external current, allowing it to be used many times.