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Final Exam - Spring Chemistry

Total questions: 65

Worksheet time: 2hrs 54mins

Name
Class
Date
1.

The electrons in a polar covalent molecule are shared...

a)

Evenly

b)

Unevenly

c)

Electrons are not shared

d)

None of the Above

2.

The electrons in a nonpolar covalent molecule are shared...

a)

Evenly

b)

Unevenly

c)

Electrons are not shared

d)

None of the Above

3.

Partial charges are present in which type of bond?

a)

Ionic

b)

Nonpolar Covalent

c)

Polar Covalent

d)

Both Polar Covalent and Ionic

4.

A diatomic molecule like O2 is always _____ because electrons are shared _____

a)

nonpolar; unequally

b)

polar; equally

c)

nonpolar; equally

d)

polar; unequally

5.

When you have H-Cl, what is the polarity?

a)

nonpolar

b)

polar

c)

ionic

6.
According to VSEPR, molecules adjust their shapes to keep which of the following as far away as possible?
a)
Pairs of valence electrons
b)
Inner shell electrons
c)
Mobile Electrons
d)
Electrons closest to the nucleus
7.
Which of the following shapes has unshared pairs of electrons on the central atom? 
a)

Linear

b)

Bent

c)

Trigonal Planar

d)

Tetrahedral

8.
Which molecule would have this shape?
a)
BF3
b)
CH4
c)
PCl5
d)
CO2
9.
What is the VSEPR theory used to predict?
a)
Bond Strength
b)
Polarity
c)
Molecular Shape
d)
Electronegativity
10.
What geometry will this molecular structure have?: H2S
a)
bent
b)
tetrahedral
c)
linear
d)
trigonal pyramidal
11.

When compared to group 1 metals, the transition metals are...

a)

weaker

b)

stronger

12.

Which of the following is not a transition metals?

a)

sodium

b)

chromium

c)

iron

d)

nickel

13.

When compared to group 1 metals, the transition metals have...

a)

higher melting points

b)

lower melting points

14.

When compared to group 1 metals, the transition metals are...

a)

less reactive

b)

more reactive

15.

Fe2+ and Fe3+ are both ions of iron. What is different about them?

a)

they have different numbers of protons

b)

they have different numbers of neutrons

c)

they have a different charge

d)

they are different elements

16.

Copper is used in electrical wiring. It is a transition metal. Which property makes it good to be used in wires?

a)

it cannot conduct electricity

b)

it can be stretched into long thin shapes

17.

Name the compound.

CrS

a)

chromium sulfide

b)

chromium (II) sulfide

c)

chromium (I) sulfide

d)

chromium (III) sulfide

18.

Unlike Ionic compounds, Covalent compounds require what when naming them?

a)

A roman numeral

b)

A charge

c)

A prefix

19.
When naming ionic compounds with transition metals you need to include roman numerals to show the _____ of the metal..
a)
atomic number
b)
mass number
c)
charge
d)
ionization energy
20.
OH-
a)
hydronium
b)
hydroxide
21.
NH4+
a)
nitrogen hydride
b)
ammonium
22.
SO42-
a)
sulfate
b)
sulfite
23.

A sour taste is a characteristic of:

a)

acids

b)

bases

c)

neutral

d)

pH scale

24.

Which is a characteristic of a base?

a)

tastes sour

b)

found mostly in foods

c)

feels slippery

d)

turn litmus paper red

25.

pH is the measure of the concentration of ______.

a)

Acids

b)

H+ ion

c)

OH- ion

d)

Bases

26.
If a solution is basic which ion will be more present?
a)
H+
b)
K+
c)
OH-
d)
H-
27.

A substance that is 3 on the pH scale would be a(n):

a)

acid

b)

base

c)

neutral

d)

solute

28.
Which one of the following is an example of a base?
a)
orange juice
b)
dish soap
c)
vinegar
d)
lemons
29.
What color does litmus paper turn in the presence of an acid?
a)
blue
b)
black
c)
green
d)
red
30.

According to the pH scale, which item is more acidic than lemons?

a)

battery

b)

vinegar

c)

milk

d)

blood

31.

According to the pH scale, which item is a stronger base than soap?

a)

baking soda

b)

ammonia solution

c)

tomato

d)

bleach

32.

Which is the correct set of acid properties?

a)

sour taste, corrosive, change litmus from red to blue

b)

sour taste, corrosive, change litmus from blue to red

c)

sweet taste, slippery, change litmus from blue to red

d)

sour taste, slippery, change litmus from blue to red

33.

Which of the following is the weakest base?

a)

oven cleaner - 13.5

b)

lemon juice - 2.5

c)

soap - 10

d)

blood - 7.4

34.

A substance is found to have the following characteristics:


Very bitter taste

Feels slippery to the touch

Produces OH- ions when dissolved in water


In what category would the substance be classified?

a)

acid

b)

base

c)

enzyme

d)

fatty acid

35.

Milk is a very weak acid. What might its pH value be?

a)

6.5

b)

7.8

c)

4.2

d)

12.2

36.
The number of atoms you begin with in a chemical reaction ...
a)
must be the same as the number of  atoms you end with
b)
must be an even number
c)
can be different to the number you finish with
d)
changes depending on how much energy is formed
37.

Balance the following:

____ Fe + ____ Cl2 → ____ FeCl3

a)
1,1,2
b)
1,3,1
c)
2,2,3
d)
2,3,2
38.

Balancing the following:

____ Al + ____ HCl → ____ AlCl3 + ____ H2

a)
1,3,1,2
b)
2,3,2,3
c)
2,6,2,3
d)
3,2,6,2
39.

Which type of reaction is:

2 NaBr + Ca(OH)2 → CaBr2 + 2 NaOH

a)
Synthesis
b)
Single Displacement
c)
Double Displacement
d)
Combustion
40.
Which type of reaction is: C2H4 + 3 O2 → 2 CO2 + 2 H2O
a)
Synthesis
b)
Decomposition
c)
Single Displacement
d)
Combustion
41.

Which type of reaction is:

2 H3AsO4 → As2O5 + 3 H2O

a)
Synthesis
b)
Decomposition
c)
Single Displacement
d)
Combustion
42.

Which type of reaction is:

3 Pb + 2 H3PO4 → 3 H2 + Pb3(PO4)2

a)
Synthesis
b)
Single Displacement
c)
Double Displacement
d)
Combustion
43.

Which type of reaction is:

4 (NH4)3PO4 + 3 Pb(NO3)4 → 12 NH4NO3 + Pb3(PO4)4

a)
Synthesis
b)
Decomposition
c)
Single Displacement
d)
Double Displacement
44.
The Law of Conservation of Matter states that the total mass of the reactants should be 
a)
More than the mass of the products
b)
Equal to the mass of the products
c)
Ignored during the reaction
d)
Less than the mass of the products
45.
When balancing equations, the rule is that you can only add, change, and remove
a)
Coefficients
b)
Mass
c)
Subscripts
d)
Elements 
46.
What is the arrow in a chemical equation...
H2 + O --> H2O
a)
Reactants
b)
Products 
c)
Yields 
d)
Chemical Equation 
47.
What are Chemical Reactions?
a)
It's when you mix substances.
b)
a process in which atoms rearrange to form new substances
c)
When something bubbles.
d)
letter and numbers showing the types and number of atoms
48.
a substance that is formed as the result of a chemical reaction
a)
Product 
b)
Reactant
c)
Starters
d)
Enders
49.
the starting materials in a chemical reaction
a)
Products
b)
Reactants
c)
Starters
d)
Enders
50.

The daily agenda can be found on google classroom and can be read from any device to stay caught up when students are not in class. Students can get their work done outside of class.

a)

True

b)

False

51.

JD has several missing assignments and has some very low marks on work he did. What would be the best suggestions for him? 2 are correct.

a)

Go to tutorials and get help with assignments and get caught up, even if it takes several days.

b)

Give up, his grade is lower that a 50.

c)

Keep his head down during class.

d)

Work extra hard during class to get caught up on some of his missing work.

52.
This pictures simulates what type of reaction?
a)
Synthesis
b)
Decomposition
c)
Single Replacement
d)
Double Replacement
53.
The molar mass of an element is equal to its...
a)
Atomic mass
b)
Atomic number
c)
Oxidation number
d)
Valence electrons
54.
The mass of one mole of substance is called...
a)
molecular mass
b)
mole constant
c)
molar mass
d)
atomic weight
55.
What is the molar mass of sodium?
a)

11g

b)

23g

c)

45.98g

d)

3g

56.
How many particles are in a mole?
a)

602

b)

602 million

c)

602 moles

d)

6.02 x 1023

57.
What is the mole used for? 
a)
To measure the amount of grams in a substance
b)
To measure the amount of atoms or molecules in a substance
c)
To measure the amount of energy in a substance
d)
To measure the amount of bonding in a substance 
58.
What is Avogadro's Number? 
a)
6.02 x 1023
b)
- 6.02 1023
c)
6.02 x 1022
d)
6,020,000,000,000
59.
How many molecules of sugar (C6H12O6) are in a mole?
a)
24 molecules
b)
180 molecules
c)
180 g
d)
6.02 x 1023 molecules
60.

Which of the following dimensional analysis setups will correctly convert 27.76 g of Li to atoms of Li?

a)

A

b)

B

c)

C

d)

D

61.

A mole is:

a)

The SI unit for mass

b)

The SI unit for the amount of a substance

c)

The SI unit for volume

d)

The SI unit for area

62.

Which has the most particles?

a)

1 mole H2

b)

1 mole Na1+

c)

1 mole Al(OH)3

d)

These are all the same

63.

Why is the mole used in chemistry?

a)

The mass of atoms is in AMUs which is too hard to convert to grams.

b)

A dozen is not a scientific amount.

c)

Chemists needed to make chemistry easier to understand.

d)

It makes counting large numbers of small particles easier.

64.

How is moles abbreviated?

a)

M

b)

m

c)

mol

d)

ml

65.

What are the units for Avogadro's number?

a)

meters

b)

particles

c)

grams

d)

liters

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