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OL Unit 3 Test- Chemical Equations

Total questions: 92

Worksheet time: 2hrs 36mins

Name
Class
Date
1.
Four students performed four different investigations by combining different substances. Which of the observations is most indicative of a chemical reaction?
a)
investigation 1
b)
investigation 2
c)
investigation 3
d)
investigation 4
2.

Sonia performed an experiment where she mixed two chemicals together - one was a clear liquid & one was a powered substance. The end result was a blue liquid. What indicated there was a chemical change?

a)

change in amount of liquid

b)

change in color of liquid

c)

this was not a chemical change

d)

the powdered substance completely dissolved

3.

Which of the following indicates a chemical reaction has taken place?

a)

change of state (solid, liquid, gas)

b)

change inshape

c)

development of a precipitate

d)

change in size

4.
What type of reaction is the equation C + O2 → CO2?
a)
Synthesis Reaction
b)
Decomposition Reaction
c)
Single Displacement Reaction
d)
Double Displacement Reaction
5.

What type of reaction is the equation NaCl → Na + Cl2?

a)

Synthesis Reaction

b)

Decomposition Reaction

c)

Single Displacement Reaction

d)

Double Displacement Reaction

6.

Cu + AgNO3 → Ag + CuNO3

a)

Synthesis Reaction

b)

Decomposition Reaction

c)

Single Displacement Reaction

d)

Double Displacement Reaction

7.

Ca3(PO4)2 + H2SO4 → CaSO4 + H3PO4

a)

Synthesis Reaction

b)

Decomposition Reaction

c)

Single Displacement Reaction

d)

Double Displacement Reaction

8.
Which generalized equation represents a synthesis reaction?
a)
A + BC → AC+ B
b)
A + B → AB
c)
AB → A + B
9.
Which generalized equation represents a decomposition reaction?
a)
A + BC → AC+ B
b)
A + B → AB
c)
AB → A + B
10.
Which generalized equation represents a single displacement reaction?
a)
A + BC → AC+ B
b)
A + B → AB
c)
AB → A + B
11.
What are the PRODUCTS of the chemical reaction pictured?
a)
CH4 and CO2
b)
CH4 and O2
c)
CO2 and H2O
d)
O2 and H2O
12.
What is the mass of H2O in the reaction above?
a)
70.01
b)
24.11
c)
21.44
d)
48.22
13.

Si + S8 → Si2S4

a)

Synthesis

b)

Decomposition

c)

Single displacement

d)

Double displacement

14.

Ca + AlCl3 → CaCl2 + Al

a)

Synthesis

b)

Decomposition

c)

Single displacement

d)

Double displacement

15.

KOH + H3PO4 → K3PO4 + H2O

a)

Synthesis

b)

Decomposition

c)

Single displacement

d)

Double displacement

16.

Pb(NO3)2 → PbO + NO2 + O2

a)

Synthesis

b)

Decomposition

c)

Single displacement

d)

Combustion

17.

Mg + N2 → Mg3N2

a)

Synthesis

b)

Decomposition

c)

Single displacement

d)

Combustion

18.

NO2 → N2 + O2

a)

Synthesis

b)

Decomposition

c)

Single displacement

d)

Combustion

19.

P4 + O2 → P2O3

a)

Synthesis

b)

Decomposition

c)

Single displacement

d)

Combustion

20.

Fe + H2SO4 → Fe2(SO4)3 + H2

a)

Synthesis (combination)

b)

Decomposition

c)

Single replacement

d)

Combustion

21.

Which reaction type is the following: C5H10O4 + O2 → CO2 + H2O

a)

Decomposition

b)

Single Replacement

c)

Combustion

d)

Double Replacement

22.

Balance this equation:

____ Li + ____Cl2 → 2 LiCl

a)

1, 1

b)

2, 2

c)

2, 1

d)

1, 2

23.

Based on the activity series, will this reaction occur?

Cu + H2O →

a)

Yes

b)

No

24.

Based on the activity series, will this reaction occur?

Br2 + KI →

a)

Yes

b)

No

25.

Based on the activity series, will this reaction occur?

Au + HCl →

a)

Yes

b)

No

26.

Based on the activity series, will this reaction occur?

Fe + HCl →

a)

Yes

b)

No

27.

Predict the product(s) of this reaction (don't worry about balancing):

Mg + HCl → H2 + ___________

a)

MgHCl

b)

MgCl2

c)

MgCl

d)

Mg2Cl

e)

no reaction

28.

Predict the product(s) of this reaction (don't worry about balancing):

SrI2 +Br2→ SrBr2 + ___________

a)

I2Br2

b)

I

c)

I2

d)

IBr2

e)

no reaction

29.

Predict the product(s) of this reaction (Don't worry about balancing)


Pb(NO3)2 + KI → PbI2 + _____________

a)

K(NO3)2

b)

NO3K

c)

KNO3

d)

KNO

30.

Which metal is more reactive than calcium?

a)

magnesium

b)

potassium

c)

silver

d)

aluminum

31.

What will be the result of the following:

Br2 + NaF → _____ + ______________

a)

bromine will replace Na

b)

Na will replace Br

c)

Br will replace F

d)

no reaction will occur

32.

What will be the result of the following:

Li + NaF →

a)

Li will replace F

b)

Na will replace Li

c)

Li will replace Na

d)

no reaction will occur

33.

What will be the result of the following:

KBr + Na →

a)

K will replace Na

b)

Na will replace Br

c)

Na will replace K

d)

no reaction will occur

34.

What will be the result of Zn+2 + AuCl2 → _____ + _______________

a)

ZnCl2 + Au

b)

ZnAu + Cl2

c)

no reaction

d)

ClAu + Zn

35.

Fill in the blank. (Copper has a charge of 2+)

Cu + AgNO3 → Ag + _____

a)

Cu(NO3)2

b)

CuNO3

c)

CuAg

d)

Cu

36.

Predict the products for the this Double Replacement reaction:

AgNO3 + KCl →

a)

AgCl + KNO3

b)

AgK + ClNO3

c)

KAg + NO3Cl

d)

AgCl + 3 KNO

37.

Predict the products for this equation.

(Zn with a charge of +2)

Zn + H2SO4 → _____ + _______________

a)

Zn(SO4)2 + H

b)

ZnSO4 + H2

c)

ZnSO4 + H4

38.

Predict the products for this Double Replacement reaction:

AgNO3 + KCl →

a)

AgCl + KNO3

b)

AgK + ClNO3

c)

KAg + NO3Cl

39.

If an element is diatomic it should have a subscript of___

a)

1, always

b)

2, only when it is by itself

c)

it shouldn't have a subscript, it should have a coefficent

40.

Which of the following indicates a chemical reaction has taken place?

a)

change of state (solid, liquid, gas)

b)

change in shape

c)

gas bubbles

d)

change in size

41.

What type of reaction is this?

a)

Synthesis Reaction

b)

Decomposition Reaction

c)

Single Displacement Reaction

d)

Double Displacement Reaction

42.

What type of reaction is this?

a)

Synthesis Reaction

b)

Decomposition Reaction

c)

Single Displacement Reaction

d)

Double Displacement Reaction

43.

What type of reaction is this?

a)

Synthesis Reaction

b)

Decomposition Reaction

c)

Single Displacement Reaction

d)

Double Displacement Reaction

44.

What type of reaction is this?

a)

Synthesis Reaction

b)

Decomposition Reaction

c)

Single Displacement Reaction

d)

Double Displacement Reaction

45.

What are the products for this reaction?

a)

AgCl + NaNO3

b)

AgNa + ClNO3

c)

NaNO + AgCl

d)

no reaction will occur

46.

What are the products for this reaction?


BaCl2 + MgSO4 --> ____________ + ____________

a)

MgCl2 + BaSO4

b)

MgBa + ClSO4

c)

BaNO + MgCl

d)

MgCl + BaSO4

47.

How many Hydrogen atoms are in 4H2O?

a)

6

b)

8

c)

2

d)

4

48.

How many Sodium atoms are in 6NaCl?

a)

1

b)

12

c)

6

49.

How many atoms of Carbon are in this formula? C6 H12O6C_{6\ }H_{12}O_6  

a)

6

b)

1

c)

12

50.

Which formulas have the most number of HYDROGENs?

a)
b)
c)
d)
51.

How many CARBON are in this formula?

a)

5

b)

2

c)

10

d)

20

52.

How many total POTASSIUM atoms are in this formula?

a)

8

b)

2

c)

4

d)

12

53.
Which is the correct formula for:
 three hydrogen (H)
one sulfur (S)
four oxygen (O)
a)
H3SO4
b)
HSO4
c)
H4S3O
d)
H2O
54.
How many atoms of barium are in Ba3(PO4)2 ?
a)
4
b)
8
c)
3
d)
2
55.
How many atoms of Sulfur are in Mn2(SO4)3 ?
a)
3
b)
4
c)
12
d)
2
56.

What are the reactants?

sodium + water --> sodium hydroxide + hydrogen

a)

sodium and sodium hydroxide

b)

sodium and water

c)

water and hydrogen

d)

sodium hydroxide and hydrogen

57.

In a chemical reaction, the substances which are present at the beginning are called reactants.

a)

True

b)

False

58.

2SO2 + O2 --> 2SO3 The coefficient of SO3 is 2.

a)

True

b)

False

59.

In the chemical equation shown, the reactants are indicated by

a)

A

b)

B

60.

Magnesium can be burned in oxygen to produce solid magnesium oxide.

a)

Mg + O2→ MgO

b)

Mg+ O→ MgO

c)

Mg + CO2 → MgO + C

d)

Mg + O2→ Mg2O2

61.

Sodium reacts with chlorine gas to produce sodium chloride.

a)

NaCl→ Cl + Na

b)

Na+ CO2 → NaCO2

c)

Na + Cl2→ NaCl

d)

Na + Cl → NaCl

62.

When hydrogen reacts with sulfur, a smelly gas, dihydrogen monosulfide, is produced.

a)

H2 + S → HS

b)

H2 + S → H2S

c)

H + S→ HS

d)

H + S→ H2S

63.

Hydrogen gas and nitrogen monoxide gas forms water and nitrogen gas.

a)

H2 + NO --> H2O + N2

b)

H + NO --> H2O + N

c)

H2 + N2O3 --> H2O + N2

d)

H + NO --> H2O + N2

64.

Potassium chlorate solid when heated produces potassium chloride solid and oxygen gas.

a)

KClO3 + heat --> KCl + O2

b)

PClO3 + heat --> PCl + O2

c)

KClO3 + heat --> KCl + O

d)

KCl + heat --> KCl + O2

65.

Barium metal and water yields barium hydroxide and hydrogen gas

a)

Ba + H2O --> Ba(OH)2 + H2

b)

Ba2 + H2O --> Ba(OH)2 + H

c)

Ba + H2O --> BaOH2 + H

d)

Ba2 --> Ba(OH)2 + H2

66.

Hydrogen gas and chlorine gas produce hydrogen chloride

a)

H2 + Cl2 --> HCl

b)

H + Cl --> HCl

c)

H2 + Cl2 --> H2Cl2

d)

H + Cl --> H2Cl

67.

Aluminum and oxygen produces aluminum oxide

a)

Al + O2 --> Al2O3

b)

Al + O --> Al2O3

c)

Al3 + O2 --> Al2O3

d)

Al + O --> AlO

68.

What are the seven diatomic elements?

a)

H2, Cl2, Br2, O2, N2, I2, F2

b)

H2, Cl2, I2, F2, Hg2, Br2, Fe2

c)

H2, Cu2, Ni2, B2, O2, I2, Fe2

69.

What part of the equation does the #1 represent?

a)

product

b)

produces/yields

c)

solid

d)

reactant

70.

CHOOSE ALL THAT APPLY: which of these equations are NOT BALANCED?

a)

F

b)

G

c)

H

d)

J

71.

The two (2) is indicating _________.

a)

subscripts

b)

reactants

c)

coefficients

d)

aqueous

72.

The three (3) indicates which part?

a)

reactants

b)

products

c)

equation

d)

formulas

73.

The number four (4) represents which part of the equation?

a)

aqueous

b)

gas

c)

liquid

d)

solid

74.

Number five (5) is indicating ____ of the equation.

a)

solid

b)

liquid

c)

gas

d)

aqueous

75.

Number six (6) is pointing to the "2" behind the H. What is that 2 called?

a)

superscript

b)

coefficient

c)

subscript

d)

subefficient

76.

Number seven (7) is indicating ____ of the equation.

a)

reactants

b)

products

c)

equation

d)

formulas

77.

Number eight (8) is indicating ____ of the equation.

a)

solid

b)

liquid

c)

gas

d)

aqueous

78.
Is this equation balanced?
a)
yes
b)
no
c)
Not enough information
d)
Left side is balanced
79.
At the end of chemical reactions, what is the total mass of the reactants compared to the total mass of the products?
a)
the product is doubled
b)
the product is half the mass of the reactants
c)
the mass is the same
d)
the mass changes depending on the reaction
80.
N2 + H2 = NH4
a)
Balanced
b)
Unbalanced
81.
Which number should go in the blank?
_ H2 + O2 -> 2 H2O
a)
1
b)
2
c)
3
d)
0
82.
Is this balanced?
Al + O2 → 2Al2O3
a)
Yes
b)
No
83.
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
84.

____ P4 + 5 O2 -----> ____ P2O5

a)

1, 5, 2

b)

2, 5, 7

c)

2, 5, 5

d)

5, 5, 2

85.

2 Al + _____ Br2 -----> ____ AlBr3

a)

2, 2, 2

b)

2, 3, 2

c)

2, 2, 4

d)

2, 2, 3

86.

4 Cr + _____O2 -----> ____ Cr2O3

a)

4, 2, 4

b)

4, 3, 4

c)

4,1, 5

d)

4, 3, 2

87.

___ NaClO3 ----> _____ NaCl + 3 O2

a)

1, 3, 3

b)

2, 3, 3

c)

2, 2, 3

d)

3, 2, 3

88.

2 AlBr3 + ___ Cl2 ----> ___ AlCl3 +___ Br2

a)

2, 2, 3, 3

b)

2, 3, 2, 3

c)

2, 3, 3, 2

d)

2, 2, 3, 4

89.

_____ H2 + _____O2 ----> 2 H2O

a)

1, 1, 2

b)

2, 2, 2

c)

1, 2, 2

d)

2, 1, 2

90.

_____ H2 + 1 N2 ----> _____ NH3

a)

1, 1, 3

b)

3, 1, 2

c)

3, 1, 1

d)

1, 1, 2

91.

_____ KClO3 ----> 2 KCl + _____ O2

a)

3, 2, 2

b)

2, 2, 2

c)

2, 2, 3

d)

2, 2, 4

92.
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

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