Answers

2016-04-18T14:12:05+05:30
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. 
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2016-04-18T17:27:33+05:30
double displacement reactions must have ions and switch places.

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