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प्रश्न
The most common ore of iron is ________. (Calcium / Haematite)
उत्तर
The most common ore of iron is Haematite.
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संबंधित प्रश्न
How does the painting of an iron object prevent rusting?
How is concentrated ore changed to oxide?
Which impurities are present in bauxite?
State a reason why zinc is used in:
dry cells
State the use of:
hard steel
Name one metal occurring as a : Halide ore
Give composition and uses of the following alloys. Mention the reason for its use.
Stainless steel
Name the alloy of zinc used in simple voltaic cells.
The following question refer to the extraction of aluminium and iron from their ores:
Iron and aluminum ores both, contain impurities. Explain briefly how these impurities are removed in each case.
From the metals copper, iron, magnesium, sodium and zinc, select a different metal in each case which:
(a) Does not react with dilute hydrochloric acid
(b) Can form 2+ and 3+ ions
(c) Has a hydroxide that reacts with both acid and alkalis.
(d) Does not react with cold water, but reacts with steam when heated.
