Chemical Reactions Quiz

What type of reaction is represented by the equation 2Mg(s) + O₂(g) → 2MgO(s)?

• Decomposition reaction

• Combination reaction

• Single-replacement reaction

• Double-replacement reaction

What type of reaction is represented by the equation 2HgO(s) → 2Hg(1) + O₂(g)?

• Decomposition reaction

• Double-replacement reaction

• Combination reaction

• Single-replacement reaction

What type of reaction is represented by the equation 2K(s) + H₂O(l) → 2KOH(aq) + H₂(g)?

• Decomposition reaction

• Double-replacement reaction

• Single-replacement reaction

• Combination reaction

Which element in the activity series can replace hydrogen from acids and water?

• Lithium

• Potassium

• Calcium

• Sodium

Which element in the activity series can replace hydrogen from acids only?

• Iron

• Zinc

• Magnesium

• Aluminum

What type of reaction is represented by the equation 2Kl(aq) + Pb(NO3)₂(aq) → Pbl(s) + 2KNO3(aq)?

• Decomposition reaction

• Single-replacement reaction

• Combination reaction

• Double-replacement reaction

What type of reaction is represented by the equation CH₂(g) + 20₂(g) → CO₂(g) + 2H₂O(g)?

• Single-replacement reaction

• Decomposition reaction

• Combination reaction

• Combustion reaction

What type of reaction is represented by the equation A + BAB → AB?

• Single-replacement reaction

• Double-replacement reaction

• Decomposition reaction

• Combination reaction

What type of reaction is represented by the equation A+B → AB?

• Combination reaction

• Decomposition reaction

• Single-replacement reaction

• Double-replacement reaction

What type of reaction is represented by the equation CH,(0,) + 0, → CO + HEO?

• Combustion reaction

• Single-replacement reaction

• Decomposition reaction

• Combination reaction