Write Reactions
Q1. Iron reacts with oxygen and water.
Q2. Magnesium reacts with sulphuric acid.
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Answer:
Rusting is an oxidation reaction. The iron reacts with water and oxygen to form hydrated iron(III) oxide, which we see as rust. Iron and steel rust when they come into contact with water and oxygen – both are needed for rusting to occur.
Magnesium reacts with dilute sulphuric acid to form magnesium sulphate and hydrogen gas is evolved. This is a single displacement reaction and also exothermic.
Explanation:
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2Fe + 3H2O -----> Fe2O3 + 3H2
Mg + H2SO4 ----> MgSO4 + H2
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