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Chemical Reactions Test Review

Total questions: 55

Worksheet time: 2hrs 43mins

Name
Class
Date
1.

What do all chemical changes have in common?

a)

Energy is absorbed and it feels cold.

b)

Energy is released and it feels hot.

c)

Gas bubbles are produced.

d)

New substances form.

2.
Which of the following is the BEST evidence that rusting is a chemical property rather than a physical property of iron?
a)
Rust forms slowly.
b)
Rust can form on any iron.
c)
Rust cannot turn back into iron.
d)
Rust does not look the same as iron.
3.
In a ___________change, a substance changes into a different substance.
a)
Physical
b)
Chemical
4.
The Law of Conservation of Mass states
a)
that matter exists in all states and reacts the same
b)
that matter can only be changed into new substances by introducing a catalyst
c)
that matter exists in the same state throughout any chemical change
d)
that matter cannot be created or destroyed and that the mass of the products must equal the mass of the reactants
5.
a copper penny turning greenish after a few years.
a)
Chemical Change
b)
Physical Change
6.
___________________ are the elements are compounds that leave (are formed in) a chemical
reaction.
a)
Polymers
b)
Bonds
c)
Reactants
d)
Products
7.

A substance that is formed as the result of a chemical reaction is a __________________

a)

Product

b)

Reactant

c)

Starters

d)

Enders

8.

Which one shows that a chemical reaction has occurred?

a)

dissolving

b)

melting

c)

formation of a gas

d)

bending

9.

What is the BEST definition of a chemical reaction?

a)

A change in matter that produces one or more NEW substances

b)

When two things combine and EXPLODE.

10.

True or False: In a complete chemical equation, there must be the same number of atoms of each element on the reactants and products side.

a)

True

b)

False

11.
A number in front of a chemical formula in an equation that indicates how many molecules or atoms of each reactant and product are involved in a reaction.
a)
Coefficient
b)
reactant
c)
subscript
d)
product 
12.
_P4+_O2 →  _P2O3
a)
3 P4+1 O2 → 2 P2O3
b)
1 P4+1 O2 → 2 P2O3
c)
1 P4+ 3 O2 → 2 P2O3
d)
1 P4+ 2 O2 → 3 P2O3
13.
_AgNO3 + _Cu →_Cu(NO3)2 + _Ag
a)
2 AgNO3 + 2 Cu → 3 Cu(NO3)2 + 1 Ag
b)
2 AgNO3 + 1 Cu → 1 Cu(NO3)2 + 2 Ag
c)
1 AgNO3 + 2 Cu → 2 Cu(NO3)2 + 1 Ag
d)
3 AgNO3 + 2 Cu → 3 Cu(NO3)2 + 2 Ag
14.
_BaS + _PtF2 → _BaF2 + _PtS
a)
1 BaS + 1 PtF2 → 1 BaF2 + 1 PtS
b)
4 BaS + 2 PtF2 → 1 BaF2 +  1 PtS
c)
1 BaS + 2 PtF2→ 2 BaF2 +  2 PtS
d)
1 BaS + 3 PtF2 →1 BaF2 +  2 PtS
15.
_AlBr3 + _K2SO4 → _KBr + _Al2(SO4)3
a)
6 AlBr3 + 1 K2SO4 → 6 KBr + 1 Al2(SO4)3
b)
2 AlBr3 + 3 K2SO4 → 6 KBr + 1 Al2(SO4)3
c)
1 AlBr3 + 1 K2SO4 → 2 KBr + 3 Al2(SO4)3
d)
2 AlBr3 + 3 K2SO4 → 1 KBr + 2 Al2(SO4)3
16.
_SO2 + _Li2Se →_SSe2 + _Li2O
a)
1 SO2 + 2 Li2Se → 1 SSe2 + 2 Li2O
b)
1 SO2 + 1 Li2Se → 2 SSe2 + 2 Li2O
c)
2 SO2 + 2 Li2Se → 2 SSe2 +  2 Li2O
d)
2 SO2 + 2 Li2Se → 1 SSe2 + 1 Li2O
17.
_Al + _HCl →_H2 + _AlCl3
a)
2 Al + 2 HCl → 2 H2 + 6 AlCl3
b)
3 Al + 3 HCl → 6 H2 + 2 AlCl3
c)
1 Al + 1 HCl → 3 H2 + 1 AlCl3
d)
2 Al + 6 HCl → 3 H2 + 2 AlCl3
18.
_K + _Cl2 →_KCl
a)
2 K + 16 Cl2 → 8 KCl
b)
2 K + 1 Cl2 → 2 KCl
c)
3 K + 4 Cl2 → 3 KCl
d)
1 K + 1 Cl2 →1 KCl
19.
_NaF + _Br2 →_NaBr + _F2
a)
1NaF + 2 Br2 →1 NaBr + 2 F2
b)
2NaF + 2 Br2 → 2 NaBr + 2 F2
c)
2 NaF + 3 Br2 → 1 NaBr + 2 F2
d)
2 NaF + 1 Br2 → 2 NaBr + 1 F2
20.
Balance this equation,            Al2O3 ---> Al + O2 
a)
Cannot be balanced
b)
2Al2O3 ---> 2Al + 3O2 
c)
2Al2O3 ---> 4Al + 3O2 
d)
3Al2O3 ---> 2Al + O2 
21.
Balance this equation:  H2 + N2 → NH3
a)
 H2 + 4N2 → NH3
b)
 H2 + 3N2 → 2NH3
c)
 3H2 + N2 → 2NH3
d)
 2H2 + 2N2 → 2NH3
22.
In every balanced chemical equation, each side of the equation has the same number of ____.  
a)
coefficients
b)
moles
c)
molecules
d)
atoms of each element
23.
When balancing equations what does
 -->
mean?
a)
subscript
b)
equals
c)
it is just an arrow
d)
yield
24.
The following is what type of reaction:
PbCl2 + AgNO3 → Pb(NO3)2 + AgCl
a)
Synthesis
b)
Decomposition
c)
Single Replacement
d)
Double Replacement
25.
The following is what type of reaction:
NH3 + HCl  → NH4Cl
a)
Synthesis
b)
Decomposition
c)
Single Replacement Replacement
d)
Double Replacement Replacement
26.
What is decomposition?
a)
putting substances together
b)
breaking substances apart
c)
element replacing another element in a compoud
d)
burning of a subtance
27.
What type of chemical reaction is this?
Al(OH)3 → Al2O3  + H2O
a)
Decomposition
b)
Combustion
c)
Synthesis
d)
Single Replacement 
28.
Ions in two compounds switch. 
a)
Synthesis
b)
Combustion
c)
Single Replacement
d)
Double Replacement
29.
3Ca + 2AlCl3 --> 3CaCl2 + 2Al
a)
Synthesis
b)
Decomposition
c)
Single Displacement
d)
Double Displacement
30.
One element replaces another in a compound.
a)
Synthesis
b)
Combustion
c)
Single Replacement
d)
Double Replacement
31.
Always starts with a Hydrocarbon that reacts with oxygen and produces carbon dioxide and water. 
a)
Decomposition
b)
Synthesis
c)
Combustion
d)
Single Replacement
32.
Two Reactants and One Product
a)
Decomposition
b)
Synthesis
c)
Combustion
d)
Single Replacement
33.
4Si   + S8   -->   2Si2S4
a)
Synthesis
b)
Decomposition
c)
Single Displacement
d)
Double Displacement
34.
C4H12 + O2 → CO2 + H2O
a)
Synthesis
b)
Combustion
c)
Single Replacement
d)
Double Replacement
35.
2Pb(NO3)2   -->   2PbO +  4NO2  +  O2
a)
Synthesis
b)
Decomposition
c)
Single Displacement
d)
Combustion
36.
3KOH + H3PO4 --> K3PO4 + 3H2O
a)
Synthesis 
b)
Decomposition
c)
Single displacement
d)
Double displacement
37.

What type of chemical reaction is this one?

Ca + MgCl2 --> CaCl2 + Mg

a)

Decomposition

b)

Combustion

c)

Synthesis

d)

Single Replacement

38.

3KOH + H3PO4 --> K3PO4 + 3H2O

a)

Combination

b)

Decomposition

c)

Single replacement

d)

Double replacement

39.
Pb(NO3)2 --> PbO + NO2 + O2
a)
Synthesis (combination)
b)
Decomposition
c)
Single replacement
d)
Combustion
40.
What kind of reaction is this:
2H2O2 →2 H2O + O2
a)
Synthesis
b)
Decomposition
c)
Single Replacement 
d)
Combustion
41.
What kind of reaction is this:
Fe + CuSO4 -> Cu + FeSO4
a)
Double Replacement
b)
Decompostion
c)
Single Replacement
d)
Combustion
42.
The following is what type of reaction:
NH3 + HCl  → NH4Cl
a)
Synthesis
b)
Decomposition
c)
Single Replacement Replacement
d)
Double Replacement Replacement
43.
in a reaction, aqueous barium chloride reacts with aqueous potassium carbonate to produce solid barium carbonate and aqueous potassium chloride. what is the correct balanced equation.
a)
Ba2Cl(aq) + KCO3(aq) --> BaCO3(s) + KCl(aq)
b)
BaCl2(aq) + K2CO3(aq) --> BaCO3(s) + 2KCl(aq)
c)
BaCl(aq) + K2CO3(aq) --> BaCO3(s) + K2Cl(aq)
d)
Ba2Cl2(aq) + KCO3(aq) --> Ba2CO3(s) + KCl2(aq)
44.

Which of the following best describes the following chemical reaction?

2NH3 --> 2N2 + 3H2

a)

nitrogen and hydrogen combine

b)

nitrogen trihydride decomposes to form nitrogen and hydrogen

c)

nitrogen hydride combines with nitrogen and hydrogen

d)

mononitrogen hydride decomposes into dinitrogen and dihydrogen

45.

Based on the activity series, will this reaction occur?

Mg (s) + H2O (l) →

a)

Yes

b)

No

46.

Based on the activity series, will this reaction occur?

Cu + ZnCl2 -->

a)

Yes

b)

No

47.

Will silver react with magnesium chloride solution?

a)

yes

b)

no

48.
Which metal is more reactive than calcium?
a)
magnesium
b)
potassium
c)
silver
d)
aluminum
49.

Which metal is more reactive than calcium?

a)

magnesium

b)

potassium

c)

silver

d)

aluminum

50.

Determine if lead (II) phosphate is soluble or insoluble.

a)

soluble

b)

insoluble

51.

State whether the following compound is soluble or insoluble. calcium carbonate CaCO3

a)

soluble

b)

insoluble

52.

State whether the following compound is soluble or insoluble. Zinc hydroxide Zn(OH)2

a)

Soluble

b)

Insoluble

53.

State whether the following compound is soluble or insoluble. iron(ii) sulfide FeS

a)

soluble

b)

insoluble

54.

State whether the following compound is soluble or insoluble.Potassium hydroxide KOH

a)

Soluble

b)

Insoluble

55.

State whether the following compound is soluble or insoluble.Silver acetate AgC2H3O2

a)

Soluble

b)

Insoluble

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