Final answer:
The major organic product in a reaction scheme is typically the final product, and a reaction is classified as synthesis if it combines smaller units into a complex molecule, such as monomers forming a dimer.
Step-by-step explanation:
In a given reaction scheme, the major organic product would typically be (c) The final product of the reaction sequence unless otherwise indicated. As reactions progress from starting materials to intermediates, and finally to products, the designation of 'major product' usually refers to the compound found in the greatest amount at the conclusion of the process.
When classifying the reaction as a synthesis or decomposition reaction, one must consider the nature of the transformation. A synthesis (or anabolic) reaction involves combining smaller units to form a more complex molecule, such as a monomer to a dimer. Conversely, a decomposition (or catabolic) reaction involves the breakdown of a complex molecule into simpler units. Given the reaction 2A → products, where 'A' represents a monomer and the product is presumably a dimer, this would be a synthesis reaction because it involves the combination of two monomeric units to form a larger one.