Aluminium smelting and iron and steel manufacturing are both classified as heavy, mineral-based, basic indust…

Question

Aluminium smelting and iron and steel manufacturing are both classified as heavy, mineral-based, basic industries. Despite these similarities, aluminium has emerged as a preferred substitute for steel in several sectors. Using the physical properties and production requirements of both metals, explain why aluminium is preferred over steel in some industries, while steel remains indispensable in others. Illustrate your answer with at least two specific examples from each metal.

Accepted Answer

## Model Answer **Aluminium vs. Steel — Preferred Uses:** Aluminium is preferred where **lightness and corrosion resistance** matter. Being light and malleable, it is ideal for **aircraft manufacturing** and **electrical wires** (good conductor). It also substitutes copper and zinc in several industries. Steel remains indispensable where **strength and durability** are critical. It is used in **construction material and engineering machinery**, and is essential for **defence equipment and scientific instruments**, as all heavy and medium industries depend on it for their machinery. Thus, aluminium suits weight-sensitive sectors, while steel is irreplaceable in load-bearing and heavy-duty applications. *Source: Chapter 6 — Aluminium Smelting; Iron and Steel Industry* --- ## Explanation - Examiners look for **contrast** — don't just describe one metal; compare both. - Cite at least **two examples each** as the question demands (aircraft, wires for aluminium; construction, defence for st…

Social Science (087) — AI-generated practice question