Which metal is described as soft, brittle, and used in galvanizing and batteries?

Zinc is described as soft and brittle, which correlates with its physical properties. It has a low tensile strength compared to other metals, making it more susceptible to breaking under stress. Despite being classified as brittle, zinc's unique properties lend themselves well to specific applications. One of its primary roles is in galvanizing, where it is used to coat other metals, particularly iron and steel, to prevent corrosion. This protective layer serves as a barrier against moisture and other environmental factors that can cause rust.

In addition to its use in galvanizing, zinc is also a crucial component in the manufacturing of batteries, specifically in zinc-based batteries. Its electrochemical properties allow it to facilitate the necessary chemical reactions to store and release electrical energy effectively. These applications showcase zinc’s versatility, highlighting its importance in both protective coatings and energy storage systems.

The other choices, while significant in various industries, do not match the description provided as precisely as zinc does. For instance, brass is an alloy primarily used for its aesthetic appeal and electrical conductivity; copper is known for its excellent electrical and thermal conductivity but is not typically classified as brittle; aluminium, while lightweight and versatile, does not share the specified brittleness associated with zinc.