Question

Name a metal of medium reactivity and write three main steps in the extraction of this metal from its sulphide ore. ​

Answer 1

Answer:

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Explanation:

Copper (Cu) is an element of medium reactivity.

1. 2CuS + O2 + heat = 2CuO + SO2

THIS PROCESS OF CONVERTING THE SULPHIDE ORE TO IT'S OXIDE FORM IS KNOWN AS ROASTING.

IT IS DONE IN PRESENCE OF EXCESS AMOUNT OF OXYGEN GAS.

THEN, THE PROCESS OF REDUCTION IS DONE.

2. CuO + heat = Cu + O2

HENCE, WE WILL GET THE PURE METAL.

Answer 2

A metal of medium reactivity - Zinc

Extraction of zinc: Zinc blende (ZnS: zinc sulphide) and smithsonite or zinc spar or calamine (ZnCO3: zinc carbonate) are ores of zinc. Zinc blende is roasted to be converted into zinc oxide. Zinc spar is put under calcination to be converted into zinc oxide.

2ZnS + 3O2 ⇨ 2ZnO + 2SO2

ZnCO3 ⇨ ZnO + CO2

Zinc oxide so obtained is reduced to zinc metal by heating with carbon (a reducing agent).

ZnO + C ⇨ Zn + CO

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