Answer:
In a displacement
reaction, a more reactive element displaces or removes another element from its
compound.
For example, zinc being more reactive, displaces copper
from its compound.
Zn(s)
+ CuSO4(aq) ® ZnSO4(aq)
+ Cu(s)
In case of double displacement reactions, two compounds
react by exchanging their ions and form two new compounds.
For example, silver and sodium exchange their ions, 3 and
? respectively and form two new compounds in the following reaction.
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