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Overall Chemistry

Total questions: 159

Worksheet time: 5hrs 57mins

Name
Class
Date
1.
Surrounding temperature gets warmer
a)
endothermic
b)
exothermic
2.
Surrounding temperature gets cold
a)
Endothermic
b)
Exothermic
3.
A process that absorbs heat is a(n) _______________ reaction?
a)
polythermic
b)
ergothermic
c)
exothermic
d)
endothermic
4.

Read the passage about a chemical reaction that absorbs or releases thermal energy.

In 2016, over a third of the electricity used in the United States was generated from natural gas. Natural gas is made up mostly of methane (CH4). Methane reacts with oxygen (O2) to make carbon dioxide (CO2) and water (H2O). As the reaction happens, chemical energy is converted to thermal energy, which is released into the surroundings. In power plants, this thermal energy is used to produce electricity.


During this chemical reaction the air around the reaction becomes _______

a)

colder

b)

warmer

5.

Read the passage about a chemical reaction that causes a change in temperature. Then, follow the instructions below.


Dynamite contains the compound nitroglycerin (C3H5N3O9). When dynamite is lit, the nitroglycerin explodes, forming nitrogen (N2), carbon monoxide (CO), water (H2O), and oxygen (O2). As the products form, the air around the reaction becomes extremely hot. The explosion is so powerful that it can blast through solid rock.

Select the true statement.

a)

This chemical reaction is exothermic. It converts chemical energy into thermal energy, which is released into the the surroundings

b)

This chemical reaction is endothermic. It absorbs thermal energy from the surroundings and converts that energy into chemical energy.

6.

Read the passage about a chemical reaction that causes a change in temperature. Then, follow the instructions below.


In the hot air near a lightning strike, nitrogen (N2) and oxygen (O2) react to produce nitric oxide (NO) and nitrogen dioxide (NO2). As the products form, the air around the reaction is cooled.


Select the true statement.

a)

This chemical reaction is exothermic. It converts chemical energy into thermal energy, which is released into the the surroundings

b)

This chemical reaction is endothermic. It absorbs thermal energy from the surroundings and converts that energy into chemical energy.

7.

When calcium reacts with water, the temperature changes from 18°C to 39°C. Which statement is correct?

a)

The solution at the end is acidic

b)

The reaction is reversible

c)

The reaction is exothermic

d)

The reaction is endothermic

8.

if more heat energy is released in making bonds in the products than is taken in when breaking bonds in the reactants

a)

Exothermic

b)

Endothermic

c)

Exotermic

d)

Endotermic

9.

if less heat energy is released in making bonds in the products than is taken in when breaking bonds in the reactants

a)

Endothermic

b)

Exotermic

c)

Exothermic

d)

Entrothermic

10.

Is this diagram endothermic or exothermic

a)

Endothermic

b)

Exotermic

c)

Exothermic

d)

Endote

11.

This diagram is exothermic. Why?

a)

products are always at a lower energy compared to the reactants

b)

Products are always at a higher energy compared to the reactants

c)

Reactants are always the same as the products

d)

Whaaaaattttttttt?????

12.

What type of chemical reaction absorbs energy and requires energy for the reaction to occur?

a)

Endothermic

b)

Exotermic

c)

Exothermic

d)

Endotermic

13.

____ reactions usually feel cold.

a)

endothermic

b)

exothermic

14.

_____ reactions usually feel hot!

a)

endothermic

b)

exothermic

15.

In an endothermic reaction, energy is _________.

a)

absorbed

b)

released

16.

During an exothermic reaction, heat is _________ and chemical bonds __________.

a)

released, formed

b)

absorbed, broken

c)

released, broken

d)

absorbed, formed

17.

Endo means in or _______.

a)

absorbed

b)

released

18.

Exo means out or ________.

a)

absorbed

b)

released

19.

When a candle is lit hydrocarbons are combusting. An exothermic reaction is occuring. Energy is being _________________ .

a)

absorbed

b)

frozen

c)

destroyed

d)

released

20.
HCl reacts with Zn giving off heat
a)
endothermic
b)
exothermic
21.
Forming bonds
a)
Endothermic
b)
Exothermic
22.
Surrounding temperature gets cold
a)
Endothermic
b)
Exothermic
23.
If a chemical reaction is EXOTHERMIC, the temperature would....
a)
Stay the same
b)
Increase
c)
Decrease
24.

Releasing heat into the surrounding is an ___________________ reaction

a)

Exothermic

b)

Endothermic

c)

Kinetic Energy

d)

Thermal Energy

25.
Which of the following tells you that a chemical change may have occurred?
a)
Change Shape
b)
Melting
c)
Vaporizing
d)
Change in color
26.
What happens in ALL chemical changes?
a)
Change in state of matter
b)
A new substance is formed
c)
Bubbles are produced
d)
An explosion
27.
Is wood burning a physical or chemical change?
a)
Physical 
b)
Chemical
28.
Is milk going sour a physical or chemical change?
a)
Physical 
b)
Chemical
29.
Is making orange juice a physical or chemical change?
a)
Physical 
b)
Chemical
30.
Is sharpening a pencil a physical or chemical change?
a)
Physical 
b)
Chemical
31.
Is copper tarnishing a physical or chemical change?
a)
Physical 
b)
Chemical
32.
Is the formation of the grand canyon a physical or chemical change?
a)
Physical 
b)
Chemical
33.
During Photosynthesis energy is absorbed. What kind of reaction is it?
a)
Physical
b)
Exothermic
c)
Endothermic
d)
Photothermic
34.
The Law of Conservation of Mass tells us matter can't  ______________.
a)
change color
b)
change state of matter
c)
be created or destroyed
d)
change temperature
35.

Which of the following is not a clue that a chemical reaction has taken place?

a)

Changing size

b)

Changing color

c)

A gas being formed

d)

Formation of a precipitate

36.
Which of the following IS a clue that a chemical change has occurred? 
a)
State of matter change
b)
Size Change
c)
Change in temperature
d)
Shape change
37.
In a chemical reaction, how do the reactants compare to the products?
a)
They are the same
b)
They are different
38.
Freezing Juice?
a)
Physical Change
b)
Chemical Change
39.
Change in color is a physical change.
a)
True
b)
False
40.
Fizzing, foaming, and burning are all examples of
a)
Chemical change
b)
Physical change
41.
Rust on an iron bar is an example of chemical change.
a)
True 
b)
False
42.
What kind of properties can only be observed when a substance changes into a different substance?
a)
physical properties
b)
chemical properties
43.
Ms. Ferguson added 6 g of liquid wax to a cup that weighed 12 g. What is the weight of the cup after the wax solidifies?
a)
6 g
b)
18 g
c)
12 g
d)
24 g
44.
Ky’Mireon stirs 8 g of pineapple juice mix into 200 g of ice water. What is the mass of the new solution?
a)
192
b)
200
c)
208
d)
300
45.
When you break a cracker into pieces it is a...
a)
Chemical change
b)
Physical change
46.
Which of these is a result of a chemical change?
a)
A mixture
b)
A solution
c)
A new substance
d)
Melting or freezing
47.
Photosynthesis is an example of a
a)
physical change
b)
chemical change
48.
Dissolving sugar in water is an example of a 
a)
physical change
b)
chemical change
49.
The burning of coal is an example of a
a)
chemical change
b)
physical change
50.
The melting of wax is an example of a
a)
chemical change
b)
physical change
51.
Digesting your food is an example of 
a)
chemical change
b)
physical change
52.
Using a balance to measure mass is an example of 
a)
chemical change
b)
physical change
53.
Cutting a log in to small pieces is a chemical change.
a)
true
b)
false
54.
Rusting piece of metal is an example of a chemical change.
a)
true
b)
false
55.
Which is a physical change?
a)
melting ice
b)
burning wood
c)
rotting food
d)
rusting iron
56.
Which is a physical change?
a)
digesting food
b)
burning natural gas
c)
exploding firework
d)
chopping onions
57.
Which is a chemical change?
a)
freezing fruit juice
b)
slicing a potato
c)
boiling water
d)
copper metal turning green
58.
What causes a chemical reaction when you prepare scrambled eggs?
a)
cracking the eggs in a pan
b)
heating the eggs in a pan
c)
putting pepper on the eggs
d)
putting the eggs on a plate
59.
Which is an example of a chemical reaction?
a)
paper cut into small pieces
b)
chocolate melting in a pan
c)
flour and sugar mixed in a bowl
d)
cookies baking in an oven
60.
Which is an example of a chemical reaction?
a)
paper cut into small pieces
b)
chocolate melting in a pan
c)
flour and sugar mixed in a bowl
d)
cookies baking in an oven
61.
Changes in which new substances are formed are called
a)
physical changes
b)
chemical changes
62.
Exploding Fireworks?
a)
Physical Change 
b)
Chemical Change 
63.
Freezing Juice?
a)
Physical Change
b)
Chemical Change
64.
Melting a chocolate bar?
a)
Physical Change
b)
Chemical Change 
65.
Rotting bananas?
a)
Physical Change
b)
Chemical Change
66.
Cutting your hair?
a)
Physical Change
b)
Chemical Change
67.
Is spoiling food a physical or chemical change?
a)
phyiscal
b)
chemical
68.
Is sqeezing organges to make orange juice a phyical or chemcial change?
a)
physical
b)
chemical
69.
What happens when a piece of wood burns?
a)
A physical change takes place.
b)
A chemical change takes place.
c)
The wood loses its gravity.
d)
The wood loses its inertia.
70.
Which property of a substance depends on how much of the substance there is?
a)
mass
b)
density
c)
boiling point
d)
melting point
71.
Which of the following is a sign that a chemical reaction has occurred?
a)
change in shape
b)
melting
c)
formation of a gas
d)
dissolving
72.
What is an example of a Chemical change?
a)
Ripped paper 
b)
boiled egg
c)
cracked egg
d)
sugar in water
73.
Which is a physical change?
a)
burning match 
b)
vinegar in baking soda 
c)
melting butter
d)
cooking an egg
74.
Which is a Chemical property?
a)
Thermal Conductivity 
b)
Density
c)
Malleability 
d)
Flammability 
75.
The total amount of matter (atoms) before and after a chemical reaction (change), remains the same.
a)
True
b)
False
76.
The mass after a physical change, such as ice melting into water, stays the same
a)
True
b)
False
77.
What is the definition of chemical reaction?
a)
The input which reacts chemically to create product
b)
a system where none of the reactants or products are allowed to escape
c)
occurs when the atoms and molecules of two or more substances rearrange to form new substances
d)
the output, or result of a chemical reaction
78.

During a chemical reaction, matter cannot be _______ or created.

a)

bought

b)

changed

c)

destroyed

d)

made

79.

__________ are the substances present before the chemical reaction takes place.

a)

products

b)

elements

c)

compound

d)

reactants

80.

The _________ are the substances present after the chemical reaction takes place.

a)

reactants

b)

compound

c)

products

d)

elements

81.

In this chemical equation , CH4 and 2O2 are called the...

a)

Products

b)

Reactants

c)

Coefficient

d)

Subscript

82.

The Law of Conservation of Mass States

a)

Energy cannot be created nor destroyed, it can only change form.

b)

Mass cannot be created nor destroyed, it can only change form.

c)

Mass can be created or destroyed, it cannot change form.

83.

There are 2 g worth of products in a chemical reaction. How many were needed in the reactant stage

a)

2 g

b)

13 g

c)

6.5 g

d)

8 g

84.

What does Law of Conservation say about matter

a)

That the amount of matter changes in a chemical reaction.

b)

That the amount of matter doubles in a chemical reaction.

c)

That the amount of matter stays the same in a chemical reaction.

d)

That the amount of matter halves in a chemical reaction.

85.

When a reaction produces a gas, does the reaction overall lose mass

a)

No the mass is still in the solid

b)

No the mass is conserved in the gas

c)

Yes the mass will go down when the gas leaves

d)

Yes the mass will go up when the gas leaves

86.

If 45g of reactants go through a reaction how much product will be produced?

a)

20g

b)

15g

c)

35g

d)

45g

87.

If 45g of reactants go through a reaction how much product will be produced?

a)

20g

b)

15g

c)

35g

d)

45g

88.

If 10g of reactants go through a reaction how much product will be produced?

a)

22g

b)

12g

c)

15g

d)

10g

89.

If 67g of products were created how much reactants were needed?

a)

32g

b)

67g

c)

22g

d)

15g

90.

If there are 7 sodiums and 3 chlorine in the reactant side how much will be on the product side

a)

3 sodiums, 7 chlorines

b)

2 sodiums, 5 chlorines

c)

11 sodiums

d)

7 sodiums, 3 chlorine

91.

If there are 5 Oxygens and 6 Hydrogens in the product side how many will be on the reactant side

a)

10 Oxygens and 12 Hydrogens

b)

5 Oxygens and 6 Hydrogens

c)

22 Hydrogens

d)

22 Oxygens

92.

If there are 100g of reactants how much products will be produced

a)

50g

b)

25g

c)

100g

d)

30g

93.
In a closed system, a chemical reaction takes place.  The mass of the reactants in the beginning of the reaction is 25g.  What does the mass have to be in the end of the reaction in order to follow the law of conservation of mass?
a)
25g
b)
You can't tell with the given information.
c)
30g
d)
15g
94.
Students react baking soda & vinegar.
Which of the following would provide the evidence that the number of atoms present before a chemical reaction is equal to the number of atoms present after the chemical reaction?
a)
The mass of the plastic bag, baking soda, and vinegar before the reaction was equal to the mass after the reaction.
b)
Bubbles were produced during the reaction, which meant that a gas was being produced.
c)
The plastic bag did not change in any way, indicating that it was not involved in the reaction.
d)
The mass of the baking soda was exactly equal to the mass of the vinegar used to create the chemical reaction.
95.
In a reaction A + B ----> C,  reactant A has 5g and product  C has 9g. How many grams does reactant B should have? 
a)
4g
b)
5g
c)
9g
d)
14g
96.
If reaction starts with 20g of reactants it should produce 
a)
a total of 40g of products
b)
a total of 10g of products
c)
a total of 80 g of products
d)
a total of 20g of products
97.

Which is the correct definition for the law of conservation of mass?

a)

The Law of Conservation of Mass is the scientific rule that tells us that can't be created or destroyed, but, mass, or matter, can change form. Mass is always, always, with no exception, conserved.

b)

The law of conservation of mass is the law that explains how humans were created.

98.

Is the law of conservation important?

a)

Yes

b)

No

99.
The mass after a physical change, such as ice melting into water, stays the same
a)
True
b)
False
100.
The total amount of matter (atoms) before and after a chemical reaction (change), remains the same.
a)
True
b)
False
101.
Substance(s) that take(s) part in or undergo(es) change during a chemical reaction
a)
Product(s)
b)
Reactant(s)
c)
Subscript(s)
d)
Coefficient(s)
102.
New material(s) that is formed in a chemical reaction
a)
Product(s)
b)
Reactant(s)
c)
Subscript(s)
d)
Coefficient(s)
103.
Maria fills a bowl with 200 g of water. She puts the bowl of water in the freezer, and the water freezes. Which will most likely be the mass of the frozen water?
a)
50 g
b)
100 g
c)
200 g
d)
400 g
104.
Which are signs of a physical change? 
a)
Boiling, Melting, Malleability , Freezing, Evaporating 
b)
Gas formation, Color change , Solid formation 
c)
There are no signs 
d)
All of the avove 
105.
What are signs of chemical reaction?
a)
Fizzing 
b)
Gas formation 
c)
Color change 
d)
All of the above 
106.
4 grams of hydrogen and 32 grams of oxygen will combine to form:
a)
36 grams of water
b)
28 grams of hydroxide
c)
32 grams of oxygen
107.
how many grams of potassium react with 16 grams of oxygen to produce 94 grams of potassium oxide
a)
78
b)
111
c)
16
d)
94
108.
40 g of calcium reacts with 71 g of chlorine to produce _____ g of calcium chloride.
a)
111
b)
101
c)
71
d)
91
109.
What is the tiniest particle in the entire universe?
a)
cells
b)
gases
c)
atoms
d)
liquids
110.
Which part of an atom is POSITIVELY charged?
a)
protons
b)
neutrons
c)
electrons
d)
atoms
111.
What part of an atom is NEGATIVELY charged?
a)
protons
b)
neutrons
c)
electrons
d)
atoms
112.
Which part of an atom has no charge?
a)
protons
b)
neutrons
c)
electrons
d)
atoms
113.
The amount of matter in an object is a measure of the object's ________________.
a)
volume
b)
density
c)
mass
d)
solubility
114.

Physical Properties are

a)

Physical properties of matter

b)

are properties that can be observed without changing the matter's identity

c)

are properties that can be observed that change the matter into new matter with new properties

115.
Mass, relative density, solubility, color, texture, state of matter, conductivity, etc.
a)
Physical state
b)
Insulators
c)
Physical Properties 
d)
Inferences
116.
Which property is this testing?
a)
relative density
b)
solubility 
c)
mass
d)
conductivity 
117.
The ability of a substance to dissolve is called...
a)
malleability
b)
ductility
c)
solubility
118.
When atoms are joined together, they are called what?
a)
liquids
b)
shapes
c)
molecules
d)
solids
119.
Both beakers contain colored water.  Which property is the same for both pictures?
a)
Volume
b)
Boiling Point
c)
Mass
d)
Weight
120.
Blue Color: Chemical or Physical Property
a)
Chemical Property
b)
Physical Property
121.
Density: Chemical or Physical Property
a)
Chemical Property
b)
Physical Property
122.
Flammability (burns): Chemical or Physical Property
a)
Chemical Property
b)
Physical Property
123.
Solubility (dissolves): Chemical or Physical Property
a)
Chemical Property
b)
Physical Property
124.
Reacts with Acid: Chemical or Physical Property
a)
Chemical Property
b)
Physical Property
125.
Brittleness: Chemical or Physical Property
a)
Chemical Property
b)
Physical Property
126.
Sour Taste: Chemical or Physical Property
a)
Chemical Property
b)
Physical Property
127.
Melting Point: Chemical or Physical Property
a)
Chemical Property
b)
Physical Property
128.
Reacts with Water: Chemical or Physical Property
a)
Chemical Property
b)
Physical Property
129.
Hardness: Chemical or Physical Property
a)
Chemical Property
b)
Physical Property
130.
Boiling Point: Chemical or Physical Property
a)
Chemical Property
b)
Physical Property
131.
Luster: Chemical or Physical Property
a)
Chemical Property
b)
Physical Property
132.
Odor: Chemical or Physical Property
a)
Chemical Property
b)
Physical Property
133.
Reacts with Air: Chemical or Physical Property
a)
Chemical Property
b)
Physical Property
134.

Which of the following best describes a physical property?

a)

a property of matter not involving a chemical change

b)

a property of matter observed during a reaction in which the chemical composition or identity of the substance is changed

135.

What is the best description of an intensive property?

a)

a property of matter that does not change as the amount of matter changes

b)

a property of matter that depends on sample size

136.

Which of the following is an example of an intensive property?

a)

color

b)

mass

c)

volume

d)

length

137.

Which of the following is an example of an intensive property?

a)

length

b)

mass

c)

boiling point

d)

volume

138.

Which of the following is an example of intensive property?

a)

volume

b)

density

c)

length

d)

mass

139.

Which of the following is an example of an extensive property?

a)

pressure

b)

volume

c)

concentration

d)

odor

140.

Which of the following is an example of an extensive property of matter?

a)

Density

b)

color

c)

temperature

d)

length

141.

Which of the following is an example of an extensive property?

a)

color

b)

odor

c)

density

d)

mass

142.

Which of the following is an example of an extensive property?

a)

weight

b)

density

c)

concentration

d)

temperature

143.
Which of the following tells you that a chemical change may have occurred?
a)
Change Shape
b)
Melting
c)
Vaporizing
d)
Change in color
144.
What happens in ALL chemical changes?
a)
Change in state of matter
b)
A new substance is formed
c)
Bubbles are produced
d)
An explosion
145.
Is wood burning a physical or chemical change?
a)
Physical 
b)
Chemical
146.
Is milk going sour a physical or chemical change?
a)
Physical 
b)
Chemical
147.
Is Gatorade powder dissolving in water physical or chemical change?
a)
Physical 
b)
Chemical
148.

The mass of a lead cube is 64 grams. This is an example of __________.

a)

physical intensive property

b)

physical extensive property

c)

chemical change

d)

physical change

149.
The melting point of ice is 00 C. This is an example of ________.
a)
physical intensive property
b)
physical extensive property
c)
Chemical change
d)
Chemical property
150.
Does NOT depend on the amount of matter you have
a)
extensive property
b)
intensive property
151.
Salt is soluble in water.
a)
chemical change
b)
chemical property
c)
physical intensive property
d)
physical extensive property
152.
The mass of a lead cube is 64 grams. This is an example of 
a)
physical intensive property
b)
physical extensive property
c)
chemical change
d)
physical change
153.
What kind of properties can only be observed when a substance changes into a different substance?
a)
physical properties
b)
chemical properties
c)
liquid properties
d)
real properties
154.
mass
a)
intensive
b)
extensive
155.
volume
a)
intensive
b)
extensive
156.
weight
a)
intensive
b)
extensive
157.
melting points
a)
intensive
b)
extensive
158.
reactivity with acid
a)
intensive
b)
extensive
159.
Which of the following is a chemical property?
a)
how something tastes
b)
ability to explode
c)
ability to float in water
d)
size of an object

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