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Reactions Practice

Total questions: 72

Worksheet time: 3hrs 10mins

Name
Class
Date
1.
Which is the name of the kind of solid substance formed in this figure?  
a)
aqueous 
b)
precipitate
c)
acid
d)
synthesis 
2.
An element plus additional element reacts to form one product is an example of which type of chemical reaction? 
a)
combustion
b)
decomposition 
c)
synthesis 
d)
single replacement
3.
Magnesium reacts with hydrochloric acid to produce magnesium chloride and hydrogen gas this happens because? 
a)
Magnesium is higher on the reactivity series then hydrogen
b)
magnesium is more reactive than hydrogen
c)
magnesium is able to break the bond between HCl and form MgCl2
d)
both b and c are correct
4.
Describes the number of molecules in a compound and is used to balance a chemical reaction. 
a)
coefficient 
b)
subscript
c)
superscript
d)
SI unit
5.
Which type of reaction takes place in the presence of oxygen and produces carbon dioxide and water?
a)
double replacement 
b)
decomposition 
c)
combustion 
d)
single replacement
6.
Provides evidence that a chemical reaction has occurred. 
a)
dissolving 
b)
melting
c)
formation of a gas
d)
bending
7.
What is the probable product of a double-replacement reaction?
a)
A new compound and a replaced metal
b)
A new compound and a replaced nonmetal
c)
2 different compounds 1 aqueous and 1 that is a solid, liquid or gas
d)
A single compound
8.
What type of chemical reaction takes place when fluorine reacts with sodium bromide?
a)
single replacement 
b)
double replacement 
c)
combustion
d)
synthesis 
9.
Which reaction between halogens and halide salts will occur?
a)
F2(g)  +  FeI2(aq) → FeF2(aq)  +  I2 (g)
b)
Cl2(g) + SrF2(aq)  → SrCl2(aq)  +  F2(g)  
c)
I2(g)  + MgBr2(aq)  → MnI2(aq)  + Br2(g)
d)
Br2(l)  +  CoCl2(aq) → CoBr2(aq)  +  Cl2(g)
10.
A chemical reaction that shows the formation of a solid and identifies the spectator ions
a)
net ionic equation 
b)
double replacement 
c)
ionic equation 
d)
dissociation 
11.
What are the products of this reaction?
Cu+ AgNO3--> 
a)
Cu(NO3)2+Ag
b)
CuNO3 + Ag
c)
CuAg+NO3
d)
Cu+ AgNO3
12.
Write a Balanced Equation for this reaction:
C2H4 + 2 O2 -->
a)
C2O2 + H4
b)
CO2 + HOH
c)
CO + H
d)
2 CO2 + 2H2O
13.
Predict the products for the this reaction:
K + HCl --> 
a)
KCl + H2
b)
KHCl 
c)
KH + Cl2
d)
KCl + H
14.
What type of reaction is this?
2 C6H14 + 19 O2 --> 12 CO2 + 14 H2O
a)
Single Replacement
b)
Double Replacement
c)
Combustion
d)
Decomposition
15.
Which of the following equations represents the balanced synthesis reaction of iron (III) and oxygen?
a)
Fe + 3 O2 → Fe2O3
b)
3 Fe + 3 O2 → 2 Fe2O3
c)
2 Fe + O2 → Fe2O3
d)
4 Fe + 3 O2 → 2 Fe2O3
16.
What are the correct formulas and coefficients for the products of the following single-replacement reaction?
Mg + Al(OH)3 →
a)
No Reaction
b)
Al + Mg(OH)3
c)
2 Al + 3 Mg(OH)2
d)
3 Al + MgOH3
17.
If an element is diatomic it should have a subscript of___
a)
2, always
b)
2, only when it is by itself
c)
it shouldn't have a subscript, it should have a coefficent
18.
What kind of reaction is this:
4Fe  +  3O2 →   2Fe2O3 
a)
Synthesis
b)
Decomposition
c)
Single Replacement 
d)
Double Replacement
19.
What kind of reaction is this:
2H2O2 →2 H2O + O2
a)
Synthesis
b)
Decomposition
c)
Single Replacement 
d)
Combustion
20.
What kind of reaction is this:
Fe + CuSO4 -> Cu + FeSO4
a)
Double Replacement
b)
Decompostion
c)
Single Replacement
d)
Combustion
21.
What is the product when rubidium and oxygen gas react?
a)
RbO2
b)
Rb2O
c)
RbO
d)
Rb2O2
22.
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)
23.
 Predict the product(s):  H2O -->
a)
H and O
b)
H2 and O2
c)
H and OH
24.
Which of the following are PRODUCTS?
H2O + CO2 → HCO + HO
a)
H2O and CO2
b)
HCO and HO
c)
H2O ONLY
d)
HCO ONLY
25.
When balancing equations a ____ can be placed to the left of a formula of a substance to make the equations balanced
a)
charge
b)
subscript
c)
random number
d)
coefficient
26.
Classify
Zn + H2S → ZnS + H2
a)
synthesis
b)
combustion
c)
single replacement
d)
double replacement
27.
Classify
FeS + HCl → H2S + FeCl2
a)
synthesis
b)
combustion
c)
single replacement
d)
double replacement
28.
Ions in two compounds switch. 
a)
Synthesis
b)
Combustion
c)
Single Replacement
d)
Double Replacement
29.
What is decomposition?
a)
putting substances together
b)
breaking substances apart
c)
element replacing another element in a compoud
d)
burning of a subtance
30.
Always starts with a Hydrocarbon that reacts with oxygen and produces carbon dioxide and water. 
a)
Decomposition
b)
Synthesis
c)
Combustion
d)
Single Replacement
31.
One reactant into several products.
a)
Decomposition
b)
Synthesis
c)
Combustion
d)
Single Replacement
32.

The equation H3PO4 + 3KOH --> K3PO4 + 3H2O is an example of which type of reaction?

a)

combustion

b)

decomposition

c)

single replacement

d)

double replacement

e)

synthesis

33.

In a combustion reaction, one of the reactants is ____.

a)

carbon

b)

oxygen

c)

hydrogen

d)

nitrogen

34.
What type of reaction is illustrated below?
2HI --> H2  +  I2
a)
synthesis
b)
decomposition
c)
single replacement
d)
double replacement
35.
An element plus additional element reacts to form one product is an example of which type of chemical reaction? 
a)
combustion
b)
decomposition 
c)
synthesis 
d)
single replacement
36.
The reaction below is an example of?
AgNO3 + NaCl → AgCl + NaNO3
a)
Single Replacement
b)
Double Replacement
c)
Decomposition
d)
Combustion
37.
What kind of reaction is this:
 CaCO3 + Ag2SO4 → CaSO4 + Ag2CO3 
a)
Decomposition
b)
Single Replacement
c)
Double Replacement
d)
Combustion
38.
What kind of reaction is this:
2C3H7OH +9O2 -> 6CO2 + 8H2O
a)
Double Replacement
b)
Combustion
c)
Single Replacement
d)
Decomposition
39.
What kind of reaction is this:
4Fe  +  3O2 →   2Fe2O3 
a)
Synthesis
b)
Decomposition
c)
Single Replacement 
d)
Double Replacement
40.
What type of reaction occurs between an element and a compound?
Zn + 2HCl --> ZnCl2 + H2
a)
Synthesis
b)
Decomposition
c)
Single Replacement
d)
Double Replacement
41.
Predict the products for the following reactants.
C6H12 + O2 --> 
a)
CO + H2
b)
CO2 + O2
c)
C3H6O
d)
CO2 + H2O
42.
Predict the products for the following reactants.
Mg + I2 --> 
a)
MgI
b)
MgI2
c)
Mg + I2
d)
Mg2I
43.
Predict the products for the following reactants.
Na + MgCl2 -->
a)
NaCl + Mg
b)
NaCl2 + Mg
c)
No Reaction
d)
NaMgCl2
44.
Predict the products for the following reactants.
Al + O2 --> 
a)
AlO
b)
AlO2
c)
Al2O3
d)
Al2O
45.
Predict the products for the following reactants.

K2CO3 + BaCl2 -->
a)
No Reaction
b)
KCl + BaCO3
c)
K2Cl + BaCO3
d)
KCl2 + BaCO3
46.
Predict the products for the following reactants.
NaCl + CaBr2 -->
a)
NaBr + CaCl2
b)
NaBr2 + CaCl2
c)
No Reaction
d)
NaBr + Cl2Ca
47.
Write a complete balanced reaction for the following.
Calcium metal reacts with oxygen gas to form a solid
a)
2 Ca (s) + O2 (g) --> 2 CaO (s)
b)
2 Ca (s) + 2 O (g) --> 2 CaO (s)
c)
Ca (s) + O2 (g) --> 2 CaO (s)
d)
Ca (s) + O2 (g) -->  CaO2 (s)
48.

Metal carbonates decompose into

a)

metal oxide and water

b)

metal oxide and hydroxide

c)

metal oxide and carbon dioxide

d)

a metal and carbon dioxide

49.

metal hydroxides decompose into

a)

a metal and hydrogen gas

b)

a metal oxide and water

c)

a metal oxide and hydrogen gas

d)

a metal oxide and carbon dioxide

50.

In a single replacement involving a halide salt and a halogen molecule, the more reactive halogen will replace the less reactive halogen to form a new halide salt

a)

true

b)

false

51.

A single replacement reaction involving a halide salt and a halogen

a)

the lesser reactive halogen will replace the more reactive halogen to create a halide salt

b)

the more reactive halogen will replace the lesser reactive halogen to create a halide salt

c)

The two halogens will combine to form a covalent compound and a single metal

52.

What is the oxidation number for CO3 (carbonate)

a)

2-

b)

3-

c)

1-

d)

1+

53.

What is the oxidation number for phosphate (PO4)?

a)

2-

b)

3-

c)

1-

d)

4-

54.

What is the oxidation number for Chlorate (ClO3) ?

a)

1-

b)

2-

c)

3-

d)

4-

55.

The oxidation number for hydroxide (OH) is

a)

1-

b)

2-

c)

3-

d)

4-

56.

The oxidation number for ammonium NH4 is

a)

1-

b)

1+

c)

2-

d)

3-

57.

The oxidation number for nitrate NO3 is

a)

2-

b)

1-

c)

3-

d)

4-

58.

The oxidation numbers for Ag, Zn and Cd respectively are

a)

2+, 2+, and 1+

b)

1+, 1+ and 2+

c)

1+, 2+ and 2+

59.

When naming ionic compounds in chemical reactions

a)

the metal is named first followed by the nonmetal ion ending in

-ide

b)

the nonmetal is named first followed by the metal ion ending in

-ide

c)

the metal is named first followed by the nonmetal ion ending in

-ic

60.

when naming formulas of covalent compounds in chemical reactions you

a)

write the name of the first element and then the second ending in -ide

b)

use prefixes to show the number of atoms of each element with the second element ending in -ide

c)

do not use prefixes, the cation goes first and the anion second ending in -ide

61.

In a decomposition reaction, metal chlorates produce

a)

a metal chloride and carbon dioxide gas

b)

a metal chloride and oxygen gas

c)

a metal and chlorine gas

62.

When some acids decompose they produce

a)

metal oxides and water

b)

nonmetal oxides and carbon dioxide

c)

nonmetal oxides and water

63.

In single replacement reactions

a)

the less reactive metal replaces the metal in the compound

b)

the more reactive metal replaces the metal in the compound

64.

In acid/base reactions, they neutralize each other and produce

a)

metal hydroxides and a salt

b)

a salt and water

c)

a salt and carbon dioxide

65.

synthesis reactions where an element reacts with oxygen or sulfur produce

a)

oxides

b)

sulfides

c)

water

d)

carbon dioxide

66.

synthesis reactions with metals and halogens produce

a)

salts

b)

water

c)

alloys

67.

In a double replacement reaction, the precipitate forms because it is _____________________ in water.

a)

soluble (will dissolve)

b)

insoluble (won't dissolve)

68.

Br2, I2, N2, Cl2, H2,O2,F2 are known as

a)

supersonic molecules

b)

diatomic molecules

c)

diabolical molecules

69.

The diatomic molecules must have subscript of ______ if they are by themselves.

a)

3

b)

2

c)

4

d)

8

70.

Atoms are not created or destroyed in a chemical reaction, only rearranged to form new products. The mass of the reactants is equal to the mass of the products.

a)

Law of Conservation of Energy

b)

Law of Definite Proportions

c)

Law of Conservation of Mass

d)

Avogadro's Law

71.

The reactants in a combustion reaction are

a)

water vapor

b)

carbon dioxide

c)

hydrocarbon

d)

oxygen

72.

The products in a combustion reaction are

a)

hydrocarbon

b)

water

c)

oxygen

d)

carbon dioxide

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