Answer:
Step-by-step explanation:
A synthesis reaction is an exothermic reaction involving the formation of a single product. While a ternary compound is a compound that contains three different elements [for example Ca₃(PO₄)₂].
An example of the formation of a ternary compound
NH₃ + H₂O ⇒ NH₄OH
It can be seen from the above exothermic reaction that the production of the ternary compound is a synthesis reaction.