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Science 20 Unit A Review

Total questions: 119

Worksheet time: 30hrs 45mins

Name
Class
Date
1.

Hydrocarbons, the simplest family of carbon compounds, are made from these two elements:

a)

hydrogen and copper

b)

helium and carbon

c)

hydrogen and carbon

d)

hydrogen and oxygen

2.
Which of the following compounds is an example of hydrocarbon?
a)
CO2
b)
C2H6
c)
C2H5OH
d)
CH3COOH
3.

How many carbon atoms are in methane?

a)

1

b)

2

c)

3

d)

4

4.

How many carbon atoms are in butane?

a)

1

b)

2

c)

3

d)

4

5.

Which type of hydrocarbon contains a C=C double bond?

a)

alkanes

b)

alkenes

c)

alkynes

6.

Which type of hydrocarbon contains only C-C single bonds?

a)

alkanes

b)

alkenes

c)

alkynes

7.

What type of hydrocarbon is shown in this figure?

a)

alkane

b)

alkene

c)

alkyne

8.

What type of hydrocarbon is shown in this figure?

a)

alkane

b)

alkene

c)

alkyne

9.

Match the following:

a)
1.

Chemical Formula

b)
2.

Lewis Dot Diagram

c)
3.

Complete Structural Diagram

d)
4.

Chemical Name

10.

Match the following

a)
1.

butane

b)
2.

pentane

c)
3.

hexane

d)
4.

heptane

11.

Match the following

a)
1.

butane

b)
2.

pentane

c)
3.

hexane

d)
4.

heptane

12.

What is the chemical name of this structure?

a)

2,2-dimethylbutane

b)

2,2-dimethylpentane

c)

4,4-dimethylbutane

d)

4,4-dimethylpentane

13.

What is the chemical name of this structure?

a)

2,2,4-trimethylpentane

b)

2,4,4-trimethylpentane

c)

2,2,4-trimethylhexane

d)

2,4,4-trimethylhexane

14.

Match the following condensed structural diagrams with their chemical name:

a)
1.

3-ethylhexane

b)
2.

2,2-dimethylbutane

c)
3.

3-ethyl-2-methylpentane

d)
4.

3,4,5-trimethylheptane

15.

Match the following line diagrams with their chemical name:

a)
1.

3-ethylhexane

b)
2.

2,2-dimethylbutane

c)
3.

3-ethyl-2-methylpentane

d)
4.

3,4,5-trimethylheptane

16.

Match the general formula with each type of hydrocarbon (Hint: Use Pg. 9 of your data booklet!):

a)

CnH(2n+2)

1.

alkane

b)

CnH(2n)

2.

alkene

c)

CnH(2n–2)

3.

alkyne

17.

Match the following compounds with their chemical name:

a)
1.

2,3-dimethyl-2-pentene

b)
2.

2-propyl-1-pentene

c)
3.

4-ethyl-5-methyl-2-octyne

d)
4.

3,6-dimethyl-4-octyne

18.

Match the following fatty acids to the correct name:

a)
1.

saturated

b)
2.

monounsaturated

c)
3.

polyunsaturated

d)
4.

trans

19.

Which of the following would have the highest boiling point?

a)

C3H8

b)

C4H8

c)

C5H12

d)

C22H44

20.

Order these compounds from lowest boiling point to highest boiling point:

a)

propane (C3H8)

b)

butane (C4H10)

c)

pentane (C5H12)

d)

hexane (C6H14)

1)
2)
3)
4)
21.

Order these compounds from least reactive to most reactive:

a)

hexane (C6H14)

b)

hexene (C6H12)

c)

hexyne (C6H10)

1)
2)
3)
22.

What is the chemical name of this compound?

a)

3-methyl-5-heptyne

b)

3-methyl-5-ethyl-2-heptene

c)

5-methyl-3-heptyne

d)

3-ethyl-5-methyl-2-heptene

23.

What is the chemical name of this compound?

a)

3-methyl-5-heptyne

b)

3-methyl-5-ethyl-2-heptene

c)

5-methyl-3-heptyne

d)

3-ethyl-5-methyl-2-heptene

24.

How does petroleum form?

a)

build up of layers of trees and leaves underneath pressure and heat

b)

build up of once-living marine organisms underneath pressure and heat

c)

build up of different rocks underneath pressure and heat

d)

build up of gasses in the air

25.

The technique used to separate petroleum into different hydrocarbon fractions is called:

a)

filtration

b)

evaporation

c)

fractional distillation

d)

crystallization

26.

Fractional distillation occurs when petroleum is separated into fractions by:

a)

mixing it with chemicals and letting it settle

b)

putting it under intense pressure until it becomes solid

c)

heating it to different boiling points then condensing

d)

removing oxygen from it

27.

In a voltaic cell, the anode is:

a)

positive

b)

negative

28.

In a voltaic cell, the cathode is:

a)

positive

b)

negative

29.

In a voltaic cell, oxidation occurs at the:

a)

anode

b)

cathode

30.

In a voltaic cell, reduction occurs at the:

a)

anode

b)

cathode

31.

In a voltaic cell, electrons flow from the:

a)

anode to the cathode

b)

cathode to the anode

32.

In this voltaic cell, which electrode is undergoing reduction?

a)

Cu | Cu2+

b)

Zn | Zn2+

33.

What reaction occurs at the anode?

a)

Ag+ (aq) + e- →Ag (s)

b)

Ag (s) → Ag+ (aq) + e-

c)

Ni2+ (aq) + 2e- → Ni (s)

d)

Ni (s) → Ni2+ (aq) + 2e-

34.

Metal A is more reactive than metal B. Which statement is correct?

a)

Electrons flow in the external circuit from A to B

b)

Positive ions flow through salt bridge from A to B

c)

Positive ions flow in external circuit from B to A

d)

Electrons flow through salt bridge from B to A

35.

Which half-reaction correctly represents reduction?

a)

Ag → Ag+ + e-

b)

F2 → 2F- + 2e-

c)

Au3+ + 3e- → Au

d)

Fe2+ + e- → Fe3+

36.

Oxidation is the _________ of electrons.

a)

loss

b)

gain

c)

sharing

d)

transfer

37.

Reduction is the ___________ of electrons.

a)

loss

b)

gain

c)

sharing

d)

transfer

38.

A(n) ________ cell uses electrical energy to produce a chemical change.

a)

voltaic

b)

electrolytic

c)

hydrolytic

d)

electric

39.

A(n) ________ cell uses chemical change to produce electrical energy.

a)

voltaic

b)

electrolytic

c)

hydrolytic

d)

electric

40.

The process of depositing a metal at the cathode of an electrolytic cell is called:

a)

electrolysis

b)

hydrolysis

c)

electroplating

d)

refining

41.

The decomposition of a substance by means of an electric current is called:

a)

electrolysis

b)

hydrolysis

c)

electroplating

d)

refining

42.
What is a coefficient?
a)
The small number on the right of the chemical symbol.
b)
The large number to the left of a formula.
43.
Which side of a chemical equation is the product side?
a)
Left (before the arrow)
b)
Right (after the arrow)
44.
Which side of a chemical equation is the reactant side?
a)
Left (before the arrow)
b)
Right (after the arrow)
45.
Which problem is balanced?
a)
PbO2 + 2H2
b)
SO2 + H20 --> H2SO4
c)
2Na + 2H2O --> 2NaOH + H2
46.
Balance this equation
_Zn+_HCl-->_ZnCl2 +_H2
a)
1,1,2,1
b)
1,1,1,2
c)
1,2,1,1
d)
2,1,1,1
47.
Balance this equation.
_Mg + _Cl2 --> _MgCl2
a)
1, 2,1
b)
already balanced
c)
2,1,1
d)
1,1,2
48.

Oxidation is the _________ of electrons.

a)

loss

b)

gain

c)

sharing

d)

transfer

49.

Reduction is the ___________ of electrons.

a)

loss

b)

gain

c)

sharing

d)

transfer

50.

In a redox reaction, the species reduced

a)

gains electrons and is the oxidizing agent

b)

loses electrons and is the oxidizing agent

c)

loses electrons and is the reducing agent

d)

gains electrons and is the reducing agent

51.
Which statement is true:
Mg → Mg2+ + 2e–
a)
Mg gains 2 electrons
b)
Mg2+ loses 2 electrons
c)
Mg loses 1 electron
d)
Mg loses 2 electrons
52.
Which of the following half reactions correctly represents a reduction half reaction?
a)
Fe →Fe2+ + 2e-
b)
Pb4+ + 2e- →Pb2+
c)
2O-2 →O2 + 4e-
d)
Fe + 3e- →Fe3+
53.

In a reaction, copper is reduced; its number of electrons has:

a)

Increased

b)

Decreased

c)

Remained Constant

d)

Varies Randomly

54.
If an atom loses electrons during a chemical reaction, the atom was:
a)
Oxidized
b)
Reduced
c)
Neutralized
d)
Precipitated
55.

In a redox reaction, spectator ions...

a)

become oxidised

b)

become reduced

c)

remain unchanged

56.

Substance that oxidizes another substance by accepting its electrons.

a)

reducing agent

b)

oxidation number

c)

combustion

d)

oxidizing agent

57.

Identify the species reduced in the following reaction.


Fe(s) + 2 Ag+(aq) → Fe2+(aq) + 2 Ag(s)

a)

Fe

b)

Ag

c)

none of these

d)

None of the above

58.
Which metal is more reactive than calcium?
a)
magnesium
b)
potassium
c)
silver
d)
aluminum
59.
Which of the following metals is the most reactive according to the reactivity series of metals.
a)
Copper
b)
Zinc
c)
Magnesium 
d)
Lithium
60.
Which compound is higher in reactivity, Ag or Ca?
a)
Ag
b)
Ca
c)
Neither
d)
They're equal
61.

Indicate which of the following is more reactive.

a)

Iron

b)

Magnesium

62.
Metal A is more reactive than metal B. Which statement is correct?
a)
Electrons flow in the external circuit from A to B
b)
Positive ions flow through salt bridge from A to B
c)
Positive ions flow in external circuit from B to A.
d)
Electrons flow through salt bridge from B to A
63.

In a voltaic cell, reduction happens at the 

a)
anode
b)
cathode
c)
salt bridge
d)
voltmeter
64.

In a voltaic cell, oxidation happens at the

a)
anode
b)
cathode
c)
salt bridge
d)
voltmeter
65.
Reactions in voltaic cells are
a)
spontaneous, redox reactions
b)
non-spontaneous, redox reactions
c)
spontaneous, non-redox reactions
d)
non-spontaneous, non-redox reactions
66.
This electrode in a voltaic cell gains mass
a)
anode
b)
cathode
67.

This electrode in a voltaic cell loses mass 

a)
anode
b)
cathode
68.

In which direction does electricity flow in a voltaic cell?

a)
Electrons flow from the cathode to the anode
b)
Electrons flow from left to right
c)
Electrons flow from anode to cathode
d)
Electrons flow from right to left
69.
What is an electrolytic cell? 
a)
a cell that converts chemical energy into electrical energy 
b)
a cell that converts electrical energy into electrical energy 
c)
a cell that converts electrical energy into chemical energy 
d)
A cell that converts kinetic energy into potential energy. 
70.

The reaction is non-spontaneous in:

a)

a voltaic cell

b)

an electrolytic cell

c)

both voltaic and electrolytic cells

71.

What is the name of the positive electrode in an electrolytic cell?

a)

cathode

b)

anode

72.

What is the name of the negative electrode in an electrolytic cell ?

a)

cathode

b)

anode

73.
What is electrolysis?
a)
breaking down of a compound using a current
b)
making a compound using a current
74.

Given the redox reaction below:

H2 + 2 Fe3+ → 2 H+ + 2 Fe2+

Which species undergoes reduction?

a)

H2

b)

Fe3+

c)

H+

d)

Fe2+

75.
If in a reaction, copper is reduced; its number of electrons has:
a)
Increased
b)
Decreased
c)
Remained Constant
d)
Varies Randomly
76.
What reaction occurs at the anode?
a)
Ag+ + e- →Ag
b)
Ag → Ag+ + e-
c)
Ni2+ + 2e- → Ni
d)
Ni → Ni2+ + 2e-
77.

Which energy conversion shown below takes place in a voltaic cell?

a)

Electrical to chemical

b)

Mechanical to chemical

c)

Mechanical to electrical

d)

Chemical to electrical

78.
Is calcium oxidized or reduced in the following reaction? 
2CaO--> 2Ca + O2
a)
Oxidized
b)
Reduced
79.

During an oxidation-reduction reaction, the number of electrons gained is

a)

equal to the number of electrons lost

b)

less than the number of electrons lost

c)

equal to the number of protons gained

d)

less than the number of protons gained

80.
In a voltaic cell, the salt bridge is necessary for
a)
the movement of electrons to create a current
b)
the movement of ions to create a current
c)
the movement of electrons to maintain the neutrality of solution
d)
the movement of ions to maintain the neutrality of solution
81.

A certain galvanic cell has for its spontaneous cell reaction: Zn + HgO → ZnO + Hg

Which is the half-reaction occurring at the anode?

a)

HgO + 2 e- → Hg + O2-

b)

Zn2+ + 2 e- → Zn

c)

Zn → Zn2+ + 2 e-

d)

ZnO + 2 e- → Zn

82.

A certain galvanic cell has for its spontaneous cell reaction: Zn + HgO → ZnO + Hg

Which is the half-reaction occurring at the cathode?

a)

HgO + 2 e- → Hg + O2-

b)

Hg → Hg2+ + 2 e-

c)

Zn → Zn2+ + 2 e-

d)

ZnO + 2 e- → Zn

83.

What is the chemical symbol for Magnesium?

a)

Mg

b)

Na

c)

Ma

d)

Au

84.

What is the chemical symbol for Gold?

a)

Au

b)

Go

c)

Ag

d)

G

85.

What is the chemical symbol of Hydrogen?

a)

H

b)

Hy

c)

Hg

d)

He

86.

What is the chemical symbol of Lead?

a)

Pb

b)

Le

c)

Ld

d)

L

87.
How many valence electrons does calcium have?
a)
2
b)
4
c)
6
d)
7
88.
A(n) _________ is an ion with a positive (+) charge.
a)
anion
b)
cation
c)
ion
d)
solute
89.
Magnesium bromide is an ionic compound with the chemical formula MgBr₂.  What does the "2" tell you?
a)
There are 2 bromide ions for every magnesium ion
b)
Bromide has a 2- charge
c)
Bromide has a 2+ charge
d)
There are 2 magnesium ions to every bromide ion
90.
What will be the compound name of the following chemical formula?
NaCl
a)
Potassium Chloride
b)
Sodium Chloride
c)
Calcium Chloride
d)
Sodium Chlorine
91.
Ionic bonds form between metals and ____.
a)
metalloids
b)
metals
c)
nonmetals
92.
What type of bond is this? Lithium with Fluorine?
a)

ionic

b)

covalent

c)

metallic

93.
What type of elements will form an ionic bond?
a)
Metals + Metals
b)
Nonmetals + Nonmetals
c)
Metals + Nonmetals
d)
None of the above
94.
Which of the following is ionic?
a)
NO2
b)
MgO
c)
CO
d)
CH4
95.
The correct formula for Potassium Sulfide is
a)
KS
b)
K2S3
c)
K2S
d)
KS2
96.
What are the three types of strong chemical bonds?
a)
Metallic, Ionic and Covalent
b)
Metallic, Atomic and Electronic
c)
Ionic, Atomic and Nucelonic
d)
Covalent, Metallic and Electronic
97.
Which particles are involved in covalent bonding?
a)
Atoms which share delocalised electrons
b)
Atoms which share pairs of electrons
c)
Oppositely charged ions
98.

What element is this?

a)

Boron

b)

Lithium

c)

Oxygen

d)

Sulfur

99.

How many energy levels does this atom have?

a)

1

b)

2

c)

3

d)

4

100.
According to the octet rule most elements need _______ valence electrons.
a)
2
b)
8
c)
6
d)
18
101.

This is a Bohr Diagram of Aluminum. How many valence electrons does Aluminum have?

a)

3

b)

4

c)

5

102.

How many valence electrons does Bromine (Br) have?

a)

5

b)

6

c)

7

d)

8

103.
Which of the following has a full valence shell?
a)
Oxygen
b)
Neon
c)
Barium
d)
Carbon
104.
What is a valence electron?
a)
an electron that is found in the outermost shell of an atom. 
b)
an electron found in the innermost shell of an atom.
c)
an electron found in the middle shell.
105.
What is a solute?
a)
The substance that does the dissolving in a solution.
b)
The substance that is dissolved into the solution.
c)
The mixing of different substances.
d)
The process in which neutral molecules lose or gain electrons
106.
What is a solvent?
a)
The substance that does the dissolving in a solution.
b)
The substance that is being dissolved in a solution.
c)
The mixing of different substances.
d)
The process in which neutral molecules lose or gain electrons
107.
If an electrical current can run through a solution, it is said to contain
a)
magic
b)
nonelectrolytes
c)
electricity
d)
electrolytes
108.

Which formula will you use for a problem looking for concentration by volume of ethanol in a solution?

a)

volume of solutevolume of solutionx100\frac{volume\ of\ solute}{volume\ of\ solution}x100  

b)

mass of solutemass of solutionx100\frac{mass\ of\ solute}{mass\ of\ solution}x100  

c)

mass of solutevolume of solutionx100\frac{mass\ of\ solute}{volume\ of\ solution}x100  

d)

C=mvC=\frac{m}{v}  

109.

What is the concentration of solution (in ppm) made up of 0.005 grams of solute in 350 grams of solution?

a)

14.3 ppm

b)

12.1 ppm

c)

1.4 ppm

d)

9.8 ppm

110.

Calculate the mass of magnesium hydroxide in a 250 mL water solution where the Mg(OH)2 concentration is 300 ppm.



(a)  

111.

The average mug of tea holds 300 mL of water. If there are 4.2 grams of sugar in a teaspoon, what is the concentration of the sugar in parts per million?



(a)  

112.

If a solution is made by taking 70 mL of ethanol and adding enough water to make 750 mL of solution, the percent volume is:

a)

9.3%

b)

10.7%

c)

0.09%

d)

70%

113.

How many moles are in 25 grams of sodium chloride (NaCl)?

a)

0.43 mol

b)

2.32 mol

c)

83.4 mol

d)

25 mol

114.

How many grams are in 3 moles of water?

a)

18 g

b)

54 g

c)

6 g

d)

30 g

115.

Calculate the molarity of 600 grams of C12H22O11 (342 g/mol) in 2.0 L of solution?

a)

1.75 M

b)

0.88 M

c)

300 M

d)

600 M

116.

What is the molarity of a 0.5L sample of a solution that contains 60.0 g of sodium hydroxide (NaOH)

a)

0.8 M

b)

1.5M

c)

3.0M

d)

6.0M

117.

A(n) _________ is an ion with a negative (-) charge.

a)

anion

b)

cation

c)

ion

d)

solute

118.

What is the molar mass of CO2?

a)

12 g/mol

b)

16 g/mol

c)

32 g/mol

d)

44 g/mol

119.
Find the molar mass of KCl
a)
36 g/mol
b)
78 g/mol
c)
74 g/mol
d)
178 g/mol

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