The reaction 2NO (g) + O2 (g) → 2NO2 (g) is a synthesis reaction.

True, the reaction given is an example of a synthesis reaction

Explanation: Synthesis reactions are reactions where two or more substances combine to form a single compound. The reaction 2NO (g) + O₂ (g) → 2NO₂ (g) is an example of a synthesis reaction.

Other types of chemical reactions may include;

Decomposition reaction in which a compound is broken down into smaller compounds or individual elements. Replacement reaction where reactive elements replace other less reactive elements in their salts. Precipitation reactions in which soluble salts reacts to form a precipitate and a soluble salt as a result of exchange of anions and cations.