Question

1)Write WORD EQUATIONS for the following:-

a)Burning of Magnesium in Oxygen.


b)Formation of Rust ( Reaction of Iron metal with air).


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Answer 1

Explanation:

a. iron + oxygen → iron oxide.

magnesium + oxygen → magnesium oxide.

b. Rust is formed when iron reacts with oxygen in moist air. The following chemical equation represents the reaction: 4Fe + 3O2 → 2Fe2O3. Water is necessary for the oxidation reaction to occur and to facilitate transport of the electrons.

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Answer 2

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a) The word equations is:

iron + oxygen → iron oxide. magnesium + oxygen → magnesium oxide.

b) When a metal reacts with oxygen, a metal oxide forms. The general equation for this reaction is: 

metal + oxygen → metal oxide. 

Rust is a form of iron oxide and it forms slowly when iron is exposed to air. Iron can be transformed to steel (an alloy), which is more resistant to rust.