Chemical Reactions

24 Questions

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Chemical Reaction Quizzes & Trivia

Review Quiz for Chemical Reactions Chapter Test


Questions and Answers
  • 1. 
    Which of the following is a word equation?
    • A. 

      Sodium oxide → sodium + oxygen

    • B. 

      Sodium oxide decomposes to form sodium and oxygen

    • C. 

      Na2O → Na + O2

    • D. 

      2Na2O → 4Na + O2

  • 2. 
    In an exothermic reaction, heat is
    • A. 

      Absorbed

    • B. 

      Released

    • C. 

      Destroyed

    • D. 

      Conserved

  • 3. 
    The breaking down of a compound into simpler substances is
    • A. 

      Displacement

    • B. 

      Synthesis

    • C. 

      Decomposition

    • D. 

      Endothermic

  • 4. 
    Each of the substances to the left of the arrow in a chemical equation is a
    • A. 

      Catalyst

    • B. 

      Product

    • C. 

      Reactant

    • D. 

      Coefficient

  • 5. 
    Numbers that precede (come before) symbols and formulas in a chemical equation are
    • A. 

      Subscripts

    • B. 

      Superscripts

    • C. 

      Coefficients

    • D. 

      Fractions

  • 6. 
    Which of the following types of reactions results in a single product?
    • A. 

      A synthesis reaction

    • B. 

      A decomposition reaction

    • C. 

      A combustion reaction

    • D. 

      A single replacement reaction

    • E. 

      A double replacement reaction

  • 7. 
    What does → signify?
    • A. 

      "and"

    • B. 

      "yields/produces"

    • C. 

      Catalyst

    • D. 

      Add heat

  • 8. 
    What type of reaction is the following?CH4 + 2O2 → CO2 + 2H2O
    • A. 

      Synthesis

    • B. 

      Decomposition

    • C. 

      Single replacement

    • D. 

      Double replacement

    • E. 

      Combustion

  • 9. 
    What type of reaction is the following?Cl2 + 2NaBr → 2NaCl + Br2
    • A. 

      Synthesis

    • B. 

      Decomposition

    • C. 

      Single-replacement

    • D. 

      Double-replacement

    • E. 

      Combustion

  • 10. 
    • A. 

      Synthesis

    • B. 

      Decomposition

    • C. 

      Single-replacement

    • D. 

      Double-replacement

    • E. 

      Combustion

  • 11. 
    What coefficients would be added to balance the following equation?Fe + O2 → Fe2O3
    • A. 

      2, 3, 1

    • B. 

      4, 3, 2

    • C. 

      It is already balanced

    • D. 

      You wouldn't add a coefficient you would just change the subscripts

  • 12. 
    What coefficients would balance the following equation?Sr + H2O → Sr(OH)2 + H2
    • A. 

      1, 4, 2, 2

    • B. 

      2, 4, 2, 4

    • C. 

      1, 2, 1, 1

    • D. 

      It is already balanced

  • 13. 
    Which of the following is NOT an observable clue that a chemical reaction has occurred?
    • A. 

      Release of a gas

    • B. 

      Odor change

    • C. 

      Precipitate formation

    • D. 

      Mixing two reactants

  • 14. 
    An insoluble substance formed from two solutions is a
    • A. 

      Reactant

    • B. 

      Precipitate

    • C. 

      Compound

    • D. 

      Product

  • 15. 
    In a double-replacement reaction
    • A. 

      The reactants are usually one metal and one nonmetal

    • B. 

      One of the reactants is often water

    • C. 

      The reactants are generally two ionic compounds

    • D. 

      Energy is always produced

  • 16. 
    In order for the reaction F2 + NaCl → Cl2 + NaF to occur, which of the following must be true?
    • A. 

      F must be above Na on the activity series

    • B. 

      F must be above Cl on the activity series

    • C. 

      Na must be above F on the activity series

    • D. 

      Cl must be above F on the activity series

  • 17. 
    Which compound would decompose to form Mg and O2?
    • A. 

      MgO2

    • B. 

      MgO

    • C. 

      Mg2O2

    • D. 

      Mg and O2

  • 18. 
    Among the elements listed, which could replace all of the rest in a single replacement reaction?
    • A. 

      Li

    • B. 

      Mg

    • C. 

      Cu

    • D. 

      Ag

    • E. 

      Ba

  • 19. 
    In a chemical reaction, the total mass of the substances before the reaction compared to the total mass of the substances after the reaction is
    • A. 

      Usually smaller

    • B. 

      Usually greater

    • C. 

      Equal

    • D. 

      Sometimes greater, sometimes smaller

  • 20. 
    What does (aq) designate?
  • 21. 
    What does (g) stand for?
  • 22. 
    What would be the products of the following decomposition reaction?LiCl →
    • A. 

      Li + Cl

    • B. 

      LiCl

    • C. 

      Li + Cl2

    • D. 

      None of the above

  • 23. 
    In a combustion reaction between a hydrocarbon and oxygen, the products are always?
    • A. 

      A synthesis reaction

    • B. 

      Carbon dioxide and water

    • C. 

      Oxygen

    • D. 

      Hydrogen, carbon and oxygen

  • 24. 
    In a combustion reaction, ______________ is always one of the reactants.
    • A. 

      O

    • B. 

      O2

    • C. 

      CO2

    • D. 

      H2O