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What is meant by double displacement reaction?

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A double displacement reaction, also known as a double replacement reaction or metathesis, is a type of chemical reaction where two compounds react, and the positive ions (cation) and the negative ions (anion) of the two reactants switch places, forming two new compounds or products.

Example of double displacement reaction is: 

Na2​S+2HCl→2NaCl+H2​S

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Sumit Saini

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