(S) 2025_Chemical Reactions TEST

Front

What type of reaction is represented by the equation CH₄ + 2 O₂ → CO₂ + 2 H₂O?

Back

Combustion reaction.

Front

What are the coefficients for the equation (NH₄)₂CO₃ + KBr → NH₄Br + K₂CO₃?

Back

1, 2, 2, 1.

Front

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

Back

Single replacement reaction.

Front

What is the general form of a double replacement reaction?

Back

AB + CD → AD + CB.

Front

What indicates a physical change in an experiment?

Back

Dissolving a substance.

Front

Define a chemical reaction.

Back

A process that involves the rearrangement of the molecular or ionic structure of a substance.

Front

What is a synthesis reaction?

Back

A reaction where two or more reactants combine to form a single product.

Front

What is a decomposition reaction?

Back

A reaction where a single compound breaks down into two or more simpler products.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change does not alter the chemical composition, while a chemical change does.

Front

What is an example of a combustion reaction?

Back

Burning of methane (CH₄) in oxygen.