Explanation:
A reaction in which two or more substances combine together to form a single product is known as synthesis reaction.
For example, [tex]C + O_{2} \rightarrow CO_{2}[/tex]
or, [tex]H_{2} + \frac{1}{2}O_{2} \rightarrow H_{2}O[/tex]
During synthesis reaction, heat or light are released in the form of energy. Therefore, synthesis reactions are exothermic in nature.
