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5/58 MCQs for:
ENVIRONMENTAL EDUCATION: Chemistry In Society - Extraction Of Metals

The equation that converts copper (I) oxide to metallic copper by auto-reduction with copper (I) sulphid is:

Copper is used in metalwork because:

Iron is used in the construction of roads, bridges and buildings because of:

Moderately reactive metals are extracted by:

The electrolyte for the electrolysis of alumina is prepared by dissolving alumina in molten cryolite. This is necessary because: