What is a synthesis reaction?

• (A) A reaction in which two or more substances combine to form a new compound.
• (B) A reaction of an acid and a base.
• (C) A reaction in which compound forms a new compound.
• (D) A reaction where atoms combine to make elements.
• (E) A reaction in which a compound breaks into separate elements.

A synthesis reaction is best described as:

Definition of Synthesis Reaction

A synthesis reaction occurs when two or more substances combine to create a new compound. This process is fundamental in chemistry as it forms the basis for many chemical reactions.

Correct Answer

The correct choice is:

• (A) A reaction in which two or more substances combine to form a new compound.

Other Options Explained

• (B) Refers to acid-base reactions, which are different from synthesis.
• (C) Is vague and does not accurately describe a synthesis reaction.
• (D) Incorrectly states that atoms combine to make elements, which is not how synthesis works.
• (E) Describes a decomposition reaction, where a compound breaks down into simpler substances.

In summary, synthesis reactions are essential for forming new compounds through the combination of simpler substances.