Question

which type of reaction has the general formula of ab + cd → ad + cb?
o synthesis
o decomposition
o oxidation
o replacement

Explanation:

In a replacement (double - replacement) reaction, two compounds exchange ions. The general form is $AB + CD
ightarrow AD+CB$. A synthesis reaction has the form $A + B
ightarrow AB$, a decomposition reaction has the form $AB
ightarrow A + B$, and oxidation reactions involve the transfer of electrons and are not defined by this general formula.

Answer:

replacement