Chemical Reactions and Their Types

What is the primary characteristic of a synthesis reaction?

• A single reactant breaks down into multiple products.

• Two different reactants combine to form a single, more complex product.

• An element replaces another element in a compound.

• Two compounds exchange ions to form two new compounds.

Which of the following is a diatomic molecule?

• He

• Na

• O2

• CO2

In a decomposition reaction, what happens to the reactant?

• It combines with another reactant to form a new product.

• It exchanges ions with another compound.

• It is broken down into two or more simpler products.

• It reacts with oxygen to produce carbon dioxide and water.

What type of chemical reaction involves one element replacing another element in a compound?

• Synthesis

• Decomposition

• Single Replacement

• Double Replacement

Which combination of reactants is characteristic of a single replacement reaction?

• Two elements

• One element and one compound

• Two compounds

• An acid and a base

In a double replacement reaction, what typically happens between the two reacting compounds?

• They combine to form a single, more complex product.

• One compound breaks down into simpler substances.

• One element replaces another element within one of the compounds.

• They exchange ions to form two new compounds.

What is always the second reactant in a combustion reaction?

• H2O

• CO2

• O2

• CxHy

What are the typical products of a combustion reaction?

• Salt and water

• Carbon dioxide and water

• Two simpler elements

• A new element and a new compound

What are the products of an acid-base neutralization reaction?

• An element and a compound

• A salt and water

• Carbon dioxide and oxygen

• Two new elements

Which of the following chemical formulas typically represents an acid?

• KOH

• KBr

• HBr

• H2O