1. Double displacement
2. Decomposition
3. Synthesis
4. Double displacement
Further explanation
Given
Some reaction equations
Required
Type of equation
Solution
4Al + 2Fe3N2 → 4AlN + 3Fe2
Double displacement
Cations and anions switch places
2PbSO4 → 2PbSO3 + O2
Decomposition
Single compounds break down into 2/more products
H2O + SO3 → H2SO4
Synthesis
Two or more reactants combine
3ZnS + 2AlP → Zn3P2 + Al2S3
Double displacement
Cations and anions switch places