Which of the following reaction is double displacement reaction?
The correct option is A FeCl3+3NaOH→Fe(OH)3+3NaCl
A double displacement reaction involves exchange of ions between the reactants in order to form the products.
In the reaction between ferric chloride and sodium hydroxide, there is exchange of Cl− and OH− ions between the reactants to form ferric hydroxide and sodium chloride. So, it is a double displacement reaction.