Chemistry - Chemical Reactions
MCQS
A. Synthesis
B. Decomposition
C. Combustion
D. Redox
Synthesis reactions combine substances to form a new product.
A. Oxygen
B. Hydrogen
C. Carbon dioxide
D. Nitrogen
Combustion reactions involve the reaction of a substance with oxygen.
A. Decomposition
B. Synthesis
C. Combustion
D. Displacement
Decomposition reactions involve the breakdown of a single compound.
A. Displacement
B. Redox
C. Combustion
D. Synthesis
Displacement reactions involve the replacement of one element by another in a compound.
A. Redox
B. Decomposition
C. Combustion
D. Synthesis
Redox reactions involve the transfer of electrons between species.
A. Double displacement
B. Single displacement
C. Synthesis
D. Combustion
Double displacement reactions involve the exchange of ions between compounds.
A. Combustion
B. Synthesis
C. Decomposition
D. Redox
The given reaction represents a synthesis reaction forming water.
A. Sodium chloride and water
B. Hydrogen gas and oxygen gas
C. Sodium hydroxide and water
D. Hydrochloric acid and oxygen gas
The reaction results in the formation of sodium chloride and water.
A. Synthesis
B. Decomposition
C. Single displacement
D. Double displacement
The given reaction is an example of a synthesis reaction.
A. Decomposition
B. Synthesis
C. Combustion
D. Displacement
The given equation represents a decomposition reaction.
A. CH₄ + 2O₂ → CO₂ + 2H₂O
B. CH₄ + O₂ → CO + H₂O
C. CH₄ + 2O₂ → CO + 2H₂O
D. CH₄ + O₂ → CO₂ + H₂O
The balanced equation is CH₄ + 2O₂ → CO₂ + 2H₂O representing complete combustion.
A. Endothermic
B. Exothermic
C. Combustion
D. Redox
Endothermic reactions absorb heat from the surroundings.
A. Synthesis
B. Decomposition
C. Single displacement
D. Double displacement
The given reaction is an example of a synthesis reaction forming sodium chloride.
A. 2HCl + Na₂CO₃ → 2NaCl + H₂O + CO₂
B. HCl + Na₂CO₃ → NaCl + H₂O + CO₂
C. 2HCl + Na₂CO₃ → NaCl + H₂O + CO₂
D. HCl + Na₂CO₃ → 2NaCl + H₂O + CO₂
The balanced equation is 2HCl + Na₂CO₃ → 2NaCl + H₂O + CO₂.
A. Zinc chloride and water
B. Zinc oxide and water
C. Zinc hydroxide and hydrogen gas
D. Zinc chloride and hydrogen gas
The reaction results in the formation of zinc chloride and hydrogen gas.
A. Decomposition
B. Synthesis
C. Combustion
D. Redox
The given equation represents a decomposition reaction breaking down water into hydrogen and oxygen.
A. Double displacement
B. Single displacement
C. Synthesis
D. Decomposition
Double displacement reactions involve the exchange of ions between two compounds.
A. Fermentation
B. Combustion
C. Synthesis
D. Decomposition
The given equation represents a fermentation reaction.
A. Single displacement
B. Double displacement
C. Synthesis
D. Decomposition
The given equation represents a single displacement reaction.
A. Decomposition
B. Synthesis
C. Single displacement
D. Redox
The given reaction is an example of a decomposition reaction.
A. Potassium sulfate and water
B. Potassium hydrogen sulfate and water
C. Potassium sulfate and hydrogen gas
D. Potassium hydroxide and sulfur dioxide
The reaction results in the formation of potassium sulfate and water.
A. 2Al + 6HCl → 2AlCl₃ + 3H₂
B. Al + HCl → AlCl₃ + H₂
C. Al + 2HCl → AlCl₂ + H₂
D. 2Al + 3HCl → AlCl₃ + H₂
The balanced equation is 2Al + 6HCl → 2AlCl₃ + 3H₂ representing the reaction between aluminum and hydrochloric acid.
A. Decomposition
B. Synthesis
C. Single displacement
D. Double displacement
Decomposition reactions involve the breakdown of compounds into simpler substances.
A. Combustion
B. Synthesis
C. Decomposition
D. Redox
The given equation represents a combustion reaction involving methane and oxygen.
A. 2H₂SO₄ + 2NaOH → 2Na₂SO₄ + 2H₂O
B. H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O
C. H₂SO₄ + NaOH → Na₂SO₄ + H₂O
D. 2H₂SO₄ + NaOH → Na₂SO₄ + 2H₂O
The balanced equation is 2H₂SO₄ + 2NaOH → 2Na₂SO₄ + 2H₂O.
A. Exothermic
B. Endothermic
C. Combustion
D. Redox
Exothermic reactions release heat to the surroundings.
A. Decomposition
B. Synthesis
C. Combustion
D. Redox
The given equation represents a decomposition reaction breaking down potassium chlorate.
A. Potassium nitrate and water
B. Nitrogen gas and oxygen gas
C. Potassium hydroxide and water
D. Potassium nitrite and water
The reaction results in the formation of potassium nitrate and water.
A. Neutralization
B. Combustion
C. Synthesis
D. Decomposition
The reaction is a neutralization reaction forming water and a salt.
A. Displacement
B. Synthesis
C. Decomposition
D. Redox
The given equation represents a displacement reaction.
A. Sodium acetate and water
B. Carbon dioxide and water
C. Sodium acetate and carbon dioxide
D. Sodium hydroxide and carbon dioxide
The reaction results in the formation of sodium acetate and carbon dioxide.
A. CaCO₃ + 2HCl → CaCl₂ + H₂O + CO₂
B. CaCO₃ + HCl → CaCl₂ + H₂O + CO₂
C. CaCO₃ + 2HCl → CaCl₂ + CO₂ + H₂O
D. CaCO₃ + HCl → CaCl₂ + CO₂ + H₂O
The balanced equation is CaCO₃ + 2HCl → CaCl₂ + CO₂ + H₂O.
A. Redox
B. Single displacement
C. Double displacement
D. Synthesis
Single displacement reactions involve a more reactive element displacing a less reactive one.
A. Synthesis
B. Decomposition
C. Redox
D. Combustion
The given equation represents a redox reaction involving ammonia and oxygen.
A. Sodium chloride and barium sulfate
B. Barium sulfate and sodium chloride
C. Sodium chloride and barium chloride
D. Sodium sulfate and barium chloride
The reaction results in the formation of barium sulfate and sodium chloride.
A. Decomposition
B. Synthesis
C. Redox
D. Combustion
The given equation represents a decomposition reaction of acetaldehyde.
A. Magnesium chloride and water
B. Carbon dioxide and water
C. Magnesium chloride and carbon dioxide
D. Magnesium hydroxide and carbon dioxide
The reaction results in the formation of magnesium chloride and carbon dioxide.
A. H₂SO₄ + K₂CO₃ → K₂SO₄ + H₂O + CO₂
B. H₂SO₄ + K₂CO₃ → K₂SO₄ + CO₂ + H₂O
C. H₂SO₄ + K₂CO₃ → K₂SO₄ + 2H₂O + CO₂
D. 2H₂SO₄ + K₂CO₃ → 2K₂SO₄ + 2H₂O + 2CO₂
The balanced equation is H₂SO₄ + K₂CO₃ → K₂SO₄ + CO₂ + H₂O.
A. Decomposition
B. Synthesis
C. Single displacement
D. Double displacement
Decomposition reactions involve the breakdown of compounds into simpler substances.
A. Synthesis
B. Decomposition
C. Single displacement
D. Double displacement
The given equation represents a single displacement reaction.
A. Silver chloride and sodium nitrate
B. Sodium chloride and silver nitrate
C. Silver chloride and sodium chloride
D. Sodium nitrate and silver chloride
The reaction forms silver chloride and sodium nitrate as products.
A. Neutralization
B. Combustion
C. Synthesis
D. Decomposition
The given equation represents a neutralization reaction between sodium hydroxide and sulfuric acid.
A. Potassium acetate and water
B. Acetic acid and potassium hydroxide
C. Potassium acetate and acetic acid
D. Water and potassium hydroxide
The reaction results in the formation of potassium acetate and water.
A. Synthesis
B. Decomposition
C. Redox
D. Combustion
The given equation represents a synthesis reaction forming water.
A. Sodium sulfate and hydrogen sulfide
B. Sodium hydrogen sulfate and water
C. Sodium sulfate and water
D. Hydrogen sulfide and sodium sulfate
The reaction forms sodium sulfate and hydrogen sulfide as products.
A. CaO + H₂O → Ca(OH)₂
B. CaO + H₂O → CaOH + H₂
C. CaO + 2H₂O → Ca(OH)₂
D. CaO + 2H₂O → CaOH + H₂
The balanced equation is CaO + 2H₂O → Ca(OH)₂ representing the reaction between calcium oxide and water.
A. Synthesis
B. Decomposition
C. Single displacement
D. Double displacement
Synthesis reactions involve the combination of elements to form compounds.
A. Synthesis
B. Decomposition
C. Redox
D. Single displacement
The given equation represents a single displacement reaction.
A. Potassium chloride and hydrogen sulfide
B. Potassium chloride and sulfuric acid
C. Hydrogen chloride and potassium sulfide
D. Hydrogen sulfide and potassium chloride
The reaction forms potassium chloride and hydrogen sulfide as products.
A. Fermentation
B. Combustion
C. Synthesis
D. Decomposition
The given equation represents a fermentation reaction.
A. Displacement
B. Synthesis
C. Decomposition
D. Redox
The given equation represents a displacement reaction.
A. Calcium nitrate and carbon dioxide
B. Nitrogen gas and water
C. Calcium nitrate and water
D. Carbon dioxide and calcium hydroxide
The reaction forms calcium nitrate and carbon dioxide as products.
A. Combustion
B. Synthesis
C. Decomposition
D. Redox
The given equation represents a combustion reaction involving butane and oxygen.
A. 2HCl + Na₂SO₃ → 2NaCl + H₂O + SO₂
B. HCl + Na₂SO₃ → NaCl + H₂O + SO₂
C. HCl + Na₂SO₃ → NaCl + H₂O + 2SO₂
D. 2HCl + Na₂SO₃ → 2NaCl + H₂O + 2SO₂
The balanced equation is 2HCl + Na₂SO₃ → 2NaCl + H₂O + SO₂.
A. Double displacement
B. Single displacement
C. Synthesis
D. Decomposition
Double displacement reactions involve the exchange of positive ions between compounds.
A. Synthesis
B. Decomposition
C. Redox
D. Combustion
The given equation represents a synthesis reaction forming hydrogen chloride.
A. Barium sulfate and sodium chloride
B. Barium chloride and sodium sulfate
C. Sodium chloride and barium sulfate
D. Sodium sulfate and barium chloride
The reaction forms barium sulfate and sodium chloride as products.
A. H₂O₂ + MnO₂ → Mn(OH)₂ + O₂
B. 2H₂O₂ + MnO₂ → Mn(OH)₂ + O₂
C. H₂O₂ + MnO₂ → MnO + H₂O + O₂
D. 2H₂O₂ + MnO₂ → MnO + H₂O + O₂
The balanced equation is 2H₂O₂ + MnO₂ → Mn(OH)₂ + O₂ representing the reaction between hydrogen peroxide and manganese dioxide.
A. Sodium sulfate and water
B. Sodium hydroxide and sulfuric acid
C. Sodium sulfate and hydrogen gas
D. Water and sodium hydroxide
The reaction forms sodium sulfate and water as products.
A. Synthesis
B. Decomposition
C. Redox
D. Combustion
The given equation represents a synthesis reaction forming ammonia.
A. Displacement
B. Synthesis
C. Decomposition
D. Redox
The given equation represents a displacement reaction.
A. 2Na₂S + 2HCl → 2NaCl + H₂S
B. Na₂S + HCl → NaCl + H₂S
C. Na₂S + 2HCl → 2NaCl + H₂S
D. Na₂S + HCl → NaCl + 2H₂S
The balanced equation is 2Na₂S + 2HCl → 2NaCl + H₂S representing the reaction between sodium sulfide and hydrochloric acid.
A. Synthesis
B. Decomposition
C. Single displacement
D. Double displacement
Synthesis reactions involve the combination of compounds to form a new compound.
A. Combustion
B. Synthesis
C. Decomposition
D. Redox
The given equation represents a combustion reaction involving ethane and oxygen.
A. Potassium bromide and water
B. Bromine gas and water
C. Potassium hydroxide and hydrobromic acid
D. Potassium bromide and hydrogen gas
The reaction forms potassium bromide and water as products.