MnSO₄ → MnO +SO₃
The type of reaction above is decomposition reaction
Explanation
Decomposition reaction is type of chemical reaction that involve breaking down of a compound into smaller compounds or individual elements.
MnSo₄ is broken down into MnO and SO₃ therefore the reaction above is a decomposition reaction.
On the other hand synthesis reaction is chemical reaction that involve two or more elements or compounds which combine to form a single product.