A) One environmental hazard associated with the extraction of zinc metal is the release of sulfur dioxide gas (SO₂) into the atmosphere during the roasting of zinc sulfide ores. This gas

a) One environmental hazard associated with the extraction of zinc metal is the release of sulfur dioxide gas ($\text{SO}_2$) into the atmosphere during the roasting of zinc sulfide ores. This gas contributes to acid rain.

b) A galvanizing plant can be set up near a zinc extraction plant. This is because zinc metal is used to galvanize steel, which means coating steel with a layer of zinc to prevent corrosion. Setting up the plant nearby reduces transportation costs for the raw material (zinc) and ensures a ready supply.

c) Properties of aluminium and its alloys that make them suitable for use in manufacturing include:

• Low density (lightweight), making it useful for aircraft and vehicles.
• Good corrosion resistance due to the formation of a protective oxide layer.
• High strength-to-weight ratio when alloyed.
• Good electrical and thermal conductivity.
• Malleability and ductility, allowing it to be easily shaped into various forms.