Types of Chemical Reactions

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

• combustion

• synthesis

• decomposition

• displacement

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

• gas

• precipitate

• water

• all options

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

• 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

• displacement of the hydrogen in water by a halogen

Which of the following is true about decomposition reactions?

• a.  Electricity may be used as the energy source.

• b.  Only two products can be formed.

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

• d.  Both (a) and (b)

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

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

• Zn

• H

• S

• O

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

Which of the following equations represents a decomposition reaction?

• 2Sb(s) + 3I₂(g) ------> 2SbI₃(s)

• 2HgO(s) ------> 2Hg(l) + O₂(g)

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

• Zn(s) + H₂SO₄(aq) ------> ZnSO₄(aq) + H₂(q)

The reaction Pb(NO₃)₂(aq) + 2KI(aq) -----> PbI₂(s) + 2KNO₃(aq) is a

• double-displacement reaction.

• synthesis reaction.

• decomposition reaction.

• combustion reaction.

The reaction 2C₂H₂(g) + 5O₂(g) -----> 4CO₂(g) + 2H₂O(l) is a

• combustion reaction.

• synthesis reaction.

• decomposition reaction.

• double-displacement reaction.

Which of the following equations represents a double-displacement reaction?

• Zn(s) + H₂SO₄(aq) -----> ZnSO₄(aq) + H₂(g)

• 2HgO(s) ----- 2Hg(l) + O₂(g)>

• FeS(s) + 2HCl(aq) ----> H₂S(g) + FeCl₂(aq)

• 2Sb(s) + 3I₂(g) -----> 2SbI₃(s)

The reaction Mg(s) + 2HCl(aq) -----> H₂(g) + MgCl₂(aq) is a

• synthesis reaction.

• decomposition reaction.

• single-displacement reaction.

• double-displacement reaction.