1.

Mention the action of oxygen with the elements sulphur, phosphorus, sodium and magnesium.

Answer»

Solution :(i) Reaction with sodium (NA): Sodium reacts with `O_(2)` vigorously at room temperature to form sodium OXIDE
`4Na_(2)+O_(2)to2Na_(2)O`
(ii) Reaction with magnesium(Mg): Magnesium reacts with oxygen upon slight heating to form magnesium oxide
`2Mg+O_(2)to2MgO`
(iii) Reaction with sulphur: Sulphur when HEATED in an atmosphere of oxygen, burns to form sulphur DIOXIDE.
`S+O_(2)toSO_(2)`
(IV) Reation with phosphorus: When phosphorus is heated in an atmosphere of oxygen it burns to produce phosphorus pentioxide.
`4P+5O_(2)to2P_(2)O_(5)`


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