1.

What is a neutralisation reaction? Give two examples.

Answer» The reaction between an acid and a base to form salt and water is called a neutalisation reaction. That is :
Acid `+` Base `to` Salt `+` Water
The examples of neutralisation reactions are as follows:
(i) Sodium hydroxide reacts with sulphuric acid to form sodium sulphate and water:
`underset(("Base"))underset("Sodium hydroxide")(2NaOH(aq))+underset(("Acid"))underset("Sulhuric acid")(H_(2)SO_(4)(aq))tounderset(("Salt"))underset("Sodium sulphate")(Na_(2)SO_(4)(aq))+underset("Water")(2H_(2)O(l))`
(ii) Magnesium hydroxide reacts with hydrochloric acid to form magnesium chloride and water:
`underset(("Base"))underset("Magnesium hydroxide")(Mg(OH)_(2)(aq))+underset(("Acid"))underset("Hydrochloric acid")(2HCl(aq))to underset(("Salt"))underset("Magnesium chloride")(MgCl_(2)(aq))+underset("Water")(2H_(2)O(l))`


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