Question

question 9 of 10
what happens in a synthesis reaction?

a. one substance breaks down into two substances.

b. atoms in two substances rearrange to form new substances.

c. two substances combine to form a single new substance.

d. one substance separates into ions in solution.

Explanation:

A synthesis reaction is defined as a type of chemical reaction where two or more reactants (substances) combine to form a single product (new substance). Let's analyze each option:

• Option A describes a decomposition reaction (one substance breaking into two or more).
• Option B describes a replacement or rearrangement reaction (like in redox or double - displacement), not synthesis.
• Option C matches the definition of a synthesis reaction (two substances combining to form one new substance).
• Option D describes dissociation (a substance breaking into ions in solution), not a synthesis reaction.

Answer:

C. Two substances combine to form a single new substance.