Ch 8.2 Chemical Equations and Reactions Quiz

What type of chemical reaction results in the formation of a single product?

• Decomposition

• Synthesis

• Displacement

• Combustion

Which of the following is a product that can be formed by double-displacement reactions?

• Gas

• water

• Precipitate

• All of the above

Which of the following is not an example of a possible type of displacement reaction?

• Displacement of the hydrogen in water by a halogen

• Displacement of the metal in a compound by another metal

• Displacement of the halogen in a compound by another halogen

• Displacement of the hydrogen in water by a metal species

Which of the following is true about decomposition reactions?

• Only two products can be formed.

• Energy as heat must be added to start the reaction; then it must be removed.

• Electricity may be used as the energy source.

• Both a and b

In the reaction Zn(s) + H₂SO₄(aq) → ZnSO₄(aq) + H₂(g), what element has been displaced?

• S

• O

• H

• Zn

Which of the following equations represents a decomposition reaction?

• 2HgO(s) → 2Hg(l) + O₂(g)

• 2Sb(s) + 31₂(g) → 2SbI₃(s)

• Zn(s) + H₂SO₄(aq) → ZnSO₄(aq) + H₂(g)

• FeS(s) + 2HCl(ag) → H₂S(g) + FeCl₂(aq)

The reaction Pb(NO₃)₂(aq) + 2KI(aq) → Pbl₂(s) + 2KNO₃(aq) is a

• Double-displacement reaction

• Synthesis reaction

• Combustion reaction

• Decomposition reaction