Question

mg + cuso₄ → cu + mgso₄
synthesis
decomposition
single displacement
double displacement
combustion

Explanation:

A single - displacement reaction is a type of chemical reaction where an element reacts with a compound and replaces another element in that compound. In the reaction \(Mg + CuSO_4
ightarrow Cu+MgSO_4\), magnesium (\(Mg\)) is replacing copper (\(Cu\)) in the copper sulfate (\(CuSO_4\)) compound.

• Synthesis: In a synthesis reaction, two or more substances combine to form a single product (\(A + B

ightarrow AB\)). This is not the case here.

• Decomposition: A decomposition reaction is when a single compound breaks down into two or more simpler substances (\(AB

ightarrow A + B\)). This reaction is not a decomposition.

• Double - displacement: In a double - displacement reaction, the positive and negative ions of two ionic compounds exchange places (\(AB+CD

ightarrow AD + CB\)). Here, it is not the case as only one element is displacing another.

• Combustion: A combustion reaction is a reaction of a substance with oxygen, usually producing heat and light. This reaction does not involve oxygen in that sense.

Answer:

Single Displacement