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प्रश्न
What iron compound is present in haematite ore? Also write its chemical formula.
उत्तर
Haematite ore contains iron (III) oxide. Its chemical formula is Fe2O3
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संबंधित प्रश्न
Metallic oxides of zinc, magnesium and copper were heated with the following metals.
| Metal | Zinc | Magnesium | Copper |
| Zinc oxide | – | – | – |
| Magnesium oxide | – | – | – |
| Copper oxide | – | – | – |
In which cases will you find displacement reactions taking place?
Write the composition of the alloy called bronze.
Name one metal which is extracted by reduction with carbon.
The metal which can be extracted from pyrolusite ore is:
(a) mercury
(b) manganese
(c) aluminium
(d) magnesium
Calamine ore can be converted into zinc oxide by the process of:
(a) dehydration
(b) roasting
(c) calcination
(d) sulphonation
Define the following term.
Gangue
How an ore is concentrated by froth floatation process?
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Zinc sulphide : Roasting : : zinc carbonate : _______
The process in which a carbonate ore is heated strongly in the absence of air to convert it into metal oxide is called ____________.
