#1
What type of reaction is represented by the equation: 2H₂ + O₂ → 2H₂O?
Combustion
ExplanationFormation of water from hydrogen and oxygen combustion.
#2
Which of the following is a characteristic of an acid-base neutralization reaction?
Formation of water
ExplanationAcid-base neutralization reactions typically produce water.
#3
What type of reaction occurs when a hydrocarbon reacts with oxygen to produce carbon dioxide and water?
Combustion
ExplanationCombustion reaction where hydrocarbons burn in oxygen to produce CO2 and H2O.
#4
In the reaction 2KClO₃ → 2KCl + 3O₂, what type of reaction is represented?
Decomposition
ExplanationDecomposition reaction where a compound breaks down into simpler substances.
#5
What type of reaction occurs when a metal displaces a less reactive metal ion in a solution?
Single replacement
ExplanationSingle replacement reaction where a more reactive metal displaces a less reactive metal ion in a compound.
#6
In the reaction FeCl₃ + 3NaOH → Fe(OH)₃ + 3NaCl, what type of reaction is represented?
Double replacement
ExplanationDouble replacement reaction where positive and negative ions of two compounds exchange places to form new compounds.
#7
What type of reaction occurs when an element reacts with a compound and displaces another element?
Single replacement
ExplanationSingle replacement reaction where an element displaces another element in a compound.
#8
Which of the following is a double displacement reaction?
2NaCl + Pb(NO₃)₂ → 2NaNO₃ + PbCl₂
ExplanationDouble displacement reaction where ions of two compounds exchange to form two new compounds.
#9
Which of the following is a precipitation reaction?
2NaCl + Pb(NO₃)₂ → 2NaNO₃ + PbCl₂
ExplanationPrecipitation reaction where an insoluble solid (precipitate) forms.
#10
What type of reaction is represented by the equation: C₆H₁₂O₆ → 2C₂H₅OH + 2CO₂?
Decomposition
ExplanationDecomposition reaction where a compound breaks down into simpler substances.
#11
Which of the following is a redox reaction?
2H₂ + O₂ → 2H₂O
ExplanationRedox reaction involving the transfer of electrons between reactants.
#12
What type of reaction is represented by the equation: NH₄NO₃ → N₂O + 2H₂O?
Decomposition
ExplanationDecomposition reaction where a compound breaks down into simpler substances.