Answer :
The statement that correctly compares synthesis and decomposition reactions would be that synthesis and decomposition reactions are opposites of each other. Synthesis reactions are in the form A + B → AB, while decomposition reactions are in the form AB → A + B. Thus, A would be the right option.
In synthesis reactions, two different atoms combine to form a compound, such that:
A + B ---> AB...................equation 1
In decomposition reactions, a compound or molecule disintegrates to form two different atoms or molecules, such that:
AB ---> A + B......................equation 2
Equation 1 is essentially the opposite of equation 2. Thus, it can be said that synthesis and decomposition reactions are opposites of each other.
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