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Balancing and types of chemical reactions

Quiz by Jesus Carrillo

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24 questions
Show answers
  • Q1
    What is the balanced equation for the combustion of methane (CH4)?
    2 CH4 + 2 O2 → 2 CO2 + H2O
    CH4 + O2 → CO2 + H2O
    CH4 + 3 O2 → 2 CO2 + 2 H2O
    CH4 + 2 O2 → CO2 + 2 H2O
    30s
  • Q2
    Which of the following is the balanced equation for the reaction between hydrogen gas and oxygen gas to form water?
    H2 + O2 → 2 H2O
    H2 + O2 → H2O
    2 H2 + 2 O2 → 2 H2O
    2 H2 + O2 → 2 H2O
    30s
  • Q3
    What is the balanced equation for the reaction of aluminum and oxygen to form aluminum oxide?
    4 Al + O2 → 2 Al2O3
    2 Al + 2 O2 → Al2O3
    4 Al + 3 O2 → 2 Al2O3
    2 Al + 3 O2 → Al2O3
    30s
  • Q4
    What is the balanced equation for the reaction between sodium and chlorine to form sodium chloride?
    2 Na + 2 Cl2 → 2 NaCl
    Na + 2 Cl2 → NaCl
    2 Na + Cl2 → 2 NaCl
    Na + Cl2 → NaCl
    30s
  • Q5
    What is the balanced equation for the synthesis of ammonia (NH3) from nitrogen and hydrogen gases?
    N2 + 2 H2 → NH3
    N2 + H2 → NH3
    2 N2 + 3 H2 → 2 NH3
    N2 + 3 H2 → 2 NH3
    30s
  • Q6
    What is the balanced equation for the reaction of calcium carbonate (CaCO3) when heated to produce calcium oxide and carbon dioxide?
    CaCO3 + O2 → CaO + CO2
    CaCO3 → CaO + CO2
    CaCO3 → CaO + 2 CO2
    2 CaCO3 → 2 CaO + CO2
    30s
  • Q7
    What is the balanced equation for the reaction between zinc and hydrochloric acid to produce zinc chloride and hydrogen gas?
    Zn + HCl → ZnCl + H2
    Zn + 2 HCl → ZnCl + 2 H2
    Zn + 2 HCl → ZnCl2 + H2
    2 Zn + 2 HCl → ZnCl2 + H2
    30s
  • Q8
    What is the balanced equation for the reaction of silver nitrate and sodium chloride to form silver chloride and sodium nitrate?
    AgNO3 + NaCl → AgCl + 2 NaNO3
    AgNO3 + NaCl → 2 AgCl + NaNO3
    AgNO3 + NaCl → AgCl + NaNO3
    2 AgNO3 + NaCl → AgCl + NaNO3
    30s
  • Q9
    What is the balanced equation for the reaction of sulfuric acid with sodium hydroxide to produce sodium sulfate and water?
    H2SO4 + NaOH → Na2SO4 + 2 H2O
    H2SO4 + 2 NaOH → NaSO4 + H2O
    H2SO4 + 2 NaOH → Na2SO4 + 2 H2O
    H2SO4 + NaOH → Na2SO4 + H2O
    30s
  • Q10
    In the balanced chemical reaction 2H2 + O2 → 2H2O, what is the coefficient of water (H2O)?
    2
    1
    3
    4
    30s
  • Q11
    Balance the following chemical equation: N2 + H2 → NH3. What is the coefficient for H2?
    2
    3
    1
    4
    30s
  • Q12
    In balancing the chemical equation Mg + HCl → MgCl2 + H2, what is the coefficient for HCl?
    3
    1
    4
    2
    30s
  • Q13
    In the reaction: Ca + H2O → Ca(OH)2 + H2, what is the coefficient for Ca(OH)2 in the balanced equation?
    1
    0
    2
    3
    30s
  • Q14
    Which of the following is an example of a synthesis reaction?
    C3H8 + 5O2 → 3CO2 + 4H2O
    CaCO3 → CaO + CO2
    2H2 + O2 → 2H2O
    Na + Cl2 → NaCl
    30s
  • Q15
    What type of reaction is represented by the equation C2H5OH + O2 → CO2 + H2O?
    synthesis
    single replacement
    combustion
    decomposition
    30s

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