ICSE Class 8 Answered
Reactions in which ions of the reactants exchange places to form two new compounds, are called double displacement reactions.
In double displacement reactions, the two reactants taking part are generally water soluble and one of the products is soluble and the other being insoluble separates out as a solid.
Sodium hydroxide reacts with hydrochloric acid to form sodium chloride and water.
NaOH(aq) + HCl(aq) ------> NaCl(aq) + H2O(l)
Sodium hydroxide Hydrochloric acid Sodium chloride Water