Final answer:
The statement is true; oxidation is always coupled with reduction, forming what is known as a redox reaction, wherein the number of electrons lost in oxidation is gained in reduction.a)True
Step-by-step explanation:
The question relates to the principle that the oxidation of one molecule is always coupled to the reduction of a second molecule, making this statement true.
During a redox reaction, the number of electrons lost by the oxidizing agent equals the number of electrons gained by the reducing agent. For example, when a molecule of pyruvate is oxidized by losing hydrogen atoms, the coenzyme NAD+ is reduced by gaining those hydrogen atoms. Hence, an oxidation process cannot occur without a corresponding reduction reaction, as they are two halves of a whole reaction called a redox reaction.