Question

Name the following : (i) A metallic ore converted to it’s oxide – iron [II] oxide on heating the concentrated ore.
(ii) A black metallic oxide reduced to metal on heating with coke.
(iii) The compound which on ignition at elevated temperatures gives pure alumina.
(iv) The non-metal which forms the anode during electrolytic reduction of fused alumina in Hall Heroult’s process.
(v) A metal other than manganese, present in duralumin but not in magnalium.

August 22, 2024

Answer

(i) Spathic Iron Ore (Iron [II] Carbonate, FeCO₃)

(ii) CuO

(iii) Aluminium hydroxide

(iv) Carbon (Graphite)

(v) Copper (Cu)

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