Final Exam Review Activity - Part 4 - Chemical Reactions

Which of the following is an indicator of a chemical reaction?

• Gas formed

• Light absorbed

• No temperature change

• No color change

What is the general formula for a synthesis reaction?

• A + B → AB

• AB → A + B

• A + B → A + B

• AB → A + B + C

Which of the following is an example of a synthesis reaction?

• 2H₂ + O₂ → 2H₂O

• H₂O → H₂ + O₂

• NaCl → Na + Cl₂

• CO₂ → C + O₂

Which of the following is NOT an indicator of a chemical reaction?

• Temperature change

• New odor produced

• Precipitate formed

• change in shape

What is formed when sodium reacts with chlorine in a synthesis reaction?

• NaCl

• NaCl₂

• SC

• SoCl₂

What is the general formula for a decomposition reaction?

• A) A + B → AB

• B) AB → A + B

• C) A + BC → AC + B

• D) A + BC → BA + C

Which of the following is an example of the decomposition of water?

• A) 2 H₂O → 2H₂ + O₂

• B) 2 HgO → 2Hg + O₂

• C) Fe + CuSO₄ → FeSO₄ + Cu

• D) Mg + 2 HCl → MgCl₂ + H₂

What is the general formula for a single replacement reaction?

• A) A + B → AB

• B) AB → A + B

• C) A + BC → AC + B

• D) A + BC → BA + C

Which of the following reactions is an example of a single replacement reaction?

• A) 2 H₂O → 2H₂ + O₂

• B) 2 HgO → 2Hg + O₂

• C) Fe + CuSO₄ → FeSO₄ + Cu

• D) AB → A + B

In the reaction Fe + CuSO₄ → Cu + ?, what is the product formed along with Cu?

• A) Fe

• B) CuSO₄

• C) FeSO₄

• D) H₂