Question

what is meant by displacement reaction​

Answer 1

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Here's your answer

=> when exchange if ions takes place it is known as double displacement reaction.

Reactions in which more active elements displaces the least reactive elements, it is know as ( single) displacement reaction.

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Answer 2

Displacement reaction is a chemical reaction in which a more reactive element displaces a less reactive element from its compound. Both metals and non-metals take part in displacement reactions.

Example : Reaction of iron nails with copper sulphate solution.