Which metal is described as light and easy to form, but lacks strength in its pure state?

• A. Copper
• B. Aluminium
• C. Steel
• D. Iron

Answer: (B)

The correct answer is aluminium. This metal is well-known for its light weight and excellent malleability, which makes it easy to form into various shapes and structures. In its pure state, aluminium does not possess the same level of strength that some other metals have, such as steel or copper. However, when alloyed with other elements, aluminium can acquire significantly enhanced strength while maintaining its lightweight properties, making it a popular choice in aerospace and automotive applications.

The other metals mentioned do not align with this description as clearly. Copper, while also malleable, is much heavier than aluminium and has a higher tensile strength in its pure form. Steel, an alloy primarily of iron and carbon, is known for its high strength. Iron itself is also strong but tends to be heavier and less formable compared to aluminium. Thus, aluminium stands out for its combination of lightweight characteristics and ease of shaping, though it lacks inherent strength when considered in its pure form.