Question

1. in what kind of reaction do two or more substances combine to form a new compound?

a. decomposition reaction
b. ionic reaction
c. double-displacement reaction
d. synthesis reaction

Explanation:

Analyze the reaction definition

$$ \text{A} + \text{B} ightarrow \text{AB} $$

Evaluate the given options

• Decomposition: one reactant breaks down into multiple products.
• Double-displacement: two compounds exchange ions.
• Synthesis: two or more substances combine to form a single new compound.

Answer:

• a. decomposition reaction
• b. ionic reaction
• c. double-displacement reaction
• d. synthesis reaction (Correct answer)