wayground logo

Free Printable Worksheets

Font size

S
M
L
XL
Worksheets

Chemistry Unit Review

Total questions: 99

Worksheet time: 1hrs 6mins

Name
Class
Date
1.

Identify the WHMIS symbol by choosing the description of the hazard.

a)

organisms or toxins that can cause disease in people or animals

b)

gases under pressure

c)

may cause or suspected of causing serious health effects

d)

can cause death or toxicity with short exposure to small amounts

2.

Identify the WHMIS symbol by choosing the description of the hazard.

a)

oxidizing hazards

b)

fire hazards

c)

corrosive damage to metals, as well as skin, eyes

d)

explosion or reactivity hazards

3.
In the event of broken equipment, what should you do?
a)
stop using the equipment and report it immediately
b)
continue using the equipment and report it immediately
c)
stop using the equipment and report it later
d)
continue using the equipment and report it later
4.
You are heating a piece of glass and now want to pick it up. You should 
a)
pour cold water on it
b)
use tongs
c)
pick up the end that looks cooler
d)
use a rag or paper towels
5.
What is special about graduated cylinders?
a)
They hold large quantities of liquid safely
b)
They measure small amounts very accurately. We use them when precision is important.
c)
They allow us to examine the liquid, we use them when looking for suspended solids.
d)
They are easily heated. We use graduated cylinders to heat liquids
6.

This is used to store and mix chemicals during an experiment

a)

graduated cylinder

b)

thermometer

c)

beaker

d)

tongs

7.

flammability of a substance

a)

physical property

b)

chemical property

8.

freezing point

a)

physical property

b)

chemical property

9.

density

a)

physical property

b)

chemical property

10.

Ductility means

a)

breaks easily

b)

process of turning to liquid when heated

c)

stretchable

d)

able to be drawn out into a long thin wire without breaking

11.
Question Image

Match the following


a)

Pure substance

1.

A

b)

Compound

2.

B

c)

Solution

3.

C

12.

Is the following a pure substance or mixture? Baking Soda ( NaHCO3NaHCO_3 ) 

a)

pure substance

b)

mixture

13.

Is the following a pure substance or mixture? Trimix (oxygen, nitrogen, and helium) found in a scuba tank

a)

pure substance

b)

mixture

14.

Is the following an element or compound? hydrogen peroxide (H2O2)

a)

element

b)

compound

15.

Classify the particle diagram.

a)

element

b)

compound

c)

mixture

16.

Classify the particle diagram.

a)

element

b)

compound

c)

mixture

17.

Classify the particle diagram.

a)

element

b)

compound

c)

mixture

18.

How would you classify this image?

a)

homogeneous mixture

b)

heterogeneous mixture

19.

The Best Friend's Club uses "invisible ink" to write notes to each other. The invisible ink is actually lemon juice that is clear when it dries on paper, but turns brown when a club member holds a burning candle under the paper. Once it is heated, it is never invisible again.

What type of change is occurring when the paper is heated?

a)

Chemical Change

b)

Physical Change

c)

Elemental Change

d)

Temperature Change

20.

A student mixes two clear liquids together. After a few minutes, a white powdery solid can be seen settling on the bottom of the test tube. Which of the following is a conclusion that the student can draw based on these observations? The two clear liquids-

a)

were pure substances before they were mixed

b)

are toxic and should be handled with extreme caution

c)

have gone through a chemical change in which a new substance called a precipitate was produced

d)

have been stored too long and are no longer good

21.

Shredding paper is an example of a

a)

chemical change

b)

physical change

c)

physical property

d)

chemical property

22.

A student added white crystals to a clear liquid. The crystals dissolved in the liquid. After a few seconds, the liquid became quite warm and then turned bright red in color. Indications that a chemical change was taking place could be observed when –

a)

the white crystals were added to the clear liquid.

b)

the crystals dissolved in the liquid leaving only the liquid visible

c)

There are no indications of chemical change

d)

the temperature of the liquid increased and an unexpected color change occurred.

23.

JJ Thomson discovered what subatomic particle

a)

nucleus

b)

neutron

c)

proton

d)

electron

24.

Rutherford discovered what part of the atom

a)

nucleus

b)

neutron

c)

proton

d)

electron

25.

Who proposed the theory that atoms orbit the nucleus in specific orbits?

a)

Bohr

b)

Democritus

c)

Rutherford

d)

Chadwick

26.

This particle balances the charges from the protons to make the atom neutral

a)

proton

b)

electron

c)

neutron

d)

nucleus

27.

These particles are found in the nucleus

a)

protons and electrons

b)

nucleus and neutrons

c)

protons and neutrons

d)

electrons and neutrons

28.

Which Scientist created this model

a)

Democritus

b)

Chadwick

c)

Bohr

d)

Rutherford

29.

Subatomic particles with a negative charge

a)

Electrons

b)

Neutrons

c)

Protons

d)

Quarks

30.
Subatomic particles with a positive charge
a)
neutrons
b)
atomic mass
c)
protons
d)
isotopes
31.
Place the following scientists in order, from earliest to latest: 
A) Ernest Rutherford
B) J.J. Thomson
C) John Dalton
a)
B,C,A
b)
C,A,B
c)
A,C,B
d)
C,B,A
32.
Rutherford's gold foil experiment provided evidence that...
a)
negative and positive charges are spread evenly throughout the atom.
b)
alpha particles have a positive charge.
c)
gold is not a dense as previously thought.
d)
there is a dense positively charged nucleus at the center of an atom.
33.
Identify letter C
a)
Nucleus
b)
Neutrons
c)
Protons
d)
Electrons
34.
An atom's overall charge is ________.
a)
positive 
b)
depends
c)
neutral 
d)
negative 
35.

Carbon has how many protons?

a)

12

b)

6

c)

7

d)

4

36.

Bromine has how many Neutrons?

a)

35

b)

80

c)

45

d)

8

37.

The atomic number tells you what?

a)

number of electrons

b)

number of protons

c)

number of neutrons

d)

both electrons and protons in an atom.

38.
Elements which are shiny, conduct electricity and heat are called
a)
metal
b)
nonmetal
c)
metalloid
d)
nonexistent
39.

In which group would you find the Noble Gases?

a)

15

b)

16

c)

17

d)

18

40.
a)
Periods
b)
Groups
41.
a)
Same group
b)
Same period
42.
a)
Group 1
b)
Group 17
c)
Group 2
d)
Group 18
43.
a)
Group 1
b)
Group 17
c)
Group 18
d)
Group 2
44.
a)
Metals
b)
Nonmetals
c)
Metalloids
45.
Which element is found  in group 17 period 3?
a)
Chlorine
b)
Flourine
c)
Oxygen
d)
Phosphorous
46.
Which is a halogen?
a)
Helium
b)
Chlorine
c)
Oxygen
d)
Neptune
47.

What is the name of the family that is highlighted?

a)

Alkali Metal Family

b)

Halogen Family

c)

Noble Gas Family

d)

Transition Metal Family

48.

Which element is the most recative non-metal?

a)

Sodium

b)

Fluorine

c)

Hydrogen

d)

Helium

49.
What is the CHEMICAL FORMULA for the molecular model pictured above?
a)
CO
b)
OC2
c)
C2O
d)
CO2
50.
What ELEMENTS are present in the chemical formula: CH4
a)
Carbon and Helium
b)
Carbon and Hydrogen
c)
Calcium and Hydrogen
d)
Copper and Helium
51.

How many atoms are in CCl4CCl_4  ?

a)

5

b)

4

c)

2

d)

6

52.

How many different elements are in the chemical formula:  CH3OHCH_{3_{ }}OH ? 

a)

6

b)

4

c)

5

d)

3

53.

How many Hydrogen atoms are in the chemical formula:  CH3OHCH_{3_{ }}OH ? 

a)

6

b)

4

c)

5

d)

3

54.

a)
b)
c)
d)
55.

a)
b)
c)
d)
56.
Which of these combinations is an ionic compound made of?
a)
Metal and Metal
b)
Nonmetal and Nonmetal
c)
Metal and Nonmetal
d)
Cation and Cation
57.
Which of these compounds is ionic? 
a)
Carbon dioxide
b)
Dinitrogen Trioxide
c)
Silicon tetrachloride
d)
Lithium bromide
58.
In general, this type of bond will form a compound with a high melting point.
a)
Ionic
b)

molecular

59.

Classify as ionic or molecular

Categorize the following

made of non metals

form conducting solutions

low melting and boiling point

solid at room temperature

Ionic
Molecular
60.
Ionic Bonding involves...
a)
The transfer of protons
b)
The transfer of nuetrons 
c)
The transfer of electrons
d)
None Of the above
61.

When dissolved in water, the solution is a good conductor of electricity.

a)

ionic compounds

b)

molecular compounds

62.

Formula for phosphorus trichloride

a)
KCl3
b)
PCl3
c)
K3Cl
d)
P3Cl
63.
The chemical formula of carbon tetrachloride is
a)
CCl
b)
C₄Cl
c)
CCl₄
d)
C(IV)Cl
64.
Name the following ionic compound: BeCl2
a)
beryllium chlorine
b)
beryllium II chloride
c)
beryllium chloride
d)
beryllium dichloride
65.
What is the correct formula for Sodium Oxide?
a)
NaO
b)
NaO2
c)
Na2O
d)
Na2O2
66.

What is the name of the following compound: NaCl

a)

sodium chloride

b)

sodium monochloride

c)

sodium chlorine

d)

sodium (I) chloride

67.
Mg2+ and Cl- create...
a)
Mg2Cl
b)
MgCl2
c)
Mg2Cl2
d)
MgCl
68.
What is the charge of an atom that has lost one electron?
a)
-1
b)
-2
c)
+1
d)
+2
69.

Which below shows a CHEMICAL change?

a)

b)

c)

70.

Which of the following is a common sign that a chemical change has occurred?

a)

new color, formation of gas or precipiate, energy change

b)

A chemical has changed to a different state of matter, such as a liquid to a solid.

c)

A chemical has changed size.

d)

A chemical has become a different shape.

71.
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
72.
In the reaction methane + oxygen turns into carbon dioxide + water, the methane and oxygen are called _______________.
a)
reactants
b)
products
c)
neutrals
d)
energizers
73.

In an endothermic reaction, energy is _________.

a)

absorbed

b)

released

74.

_____ reactions usually feel hot!

a)

endothermic

b)

exothermic

75.

Baking pizza in the oven

a)

endothermic

b)

exothermic

76.

When barium hydroxide and ammonium chloride react, the temperature of the mixture decreases. What kind of reaction is this?

a)

Endothermic

b)

Decomposition

c)

Exothermic

d)

Indothermic

77.
The word equation for combustion is: fuel + oxygen --> water + ________ __________
a)
Carbon dioxide
b)
Limewater
78.

Word equation for the equation shown

a)

magnesium + nitrogen = magnesium nitride

b)

magnesium + nitrogen = trimagnesium dinitride

c)

magnesium + nitride=trimagnesium dinitride

79.

Which diagram shows the most favourable conditions for rust to appear on the nail?

a)

A

b)

B

c)

C

d)

D

80.
Cellular respiration is...
a)
the process by which cells break down glucose into energy. 
b)
the process by which cells break light down into energy. 
c)
the process by which cells communicate with other cells. 
81.

What happens in a chemical reaction?

a)

Bonds between atoms break and/or are formed

b)

New atoms are created and/or removed

c)

Protons move from one atom to another

d)

Electrons change into protons

82.

Which of the models of a chemical reaction best represents the Law of Conservation of Mass?

a)

A

b)

B

c)

C

d)

D

83.

Which of the following is NOT a possible product for a reaction between the reactants listed here? 2HCl +CaCO32HCl\ +CaCO_3  

a)

CaCl2CaCl_2  

b)

H2OH_2O  

c)

NH3NH_3  

d)

CO2CO_2  

84.
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
85.

According to the Law of Conservation of Mass, what happens to the wood and oxygen when it is burned?

a)

The wood disappears.

b)

It stays the same chemically.

c)

The atoms in the wood and oxygen rearrange and form smoke and ash.

d)

Nothing.

86.
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
87.
This type of system allows matter to flow freely in and out...
a)
Closed System
b)
Open System
88.

How many grams of OXYGEN would be needed to show conservation of mass in the example below?

a)

100 g

b)

93 g

c)

7 g

d)

0 g

89.

How many kilograms of SMOKE are shown in the example of conservation of mass?

a)

1 kg

b)

30 kg

c)

28 kg

d)

3 kg

90.

A temperature increase causes the particles ......

a)

to slow down

b)

move faster

c)

collide higher

d)

in the right order

91.

Why does a higher concentration increase the rate of reaction?

a)

it increases the amount of reactants

b)

it lowers the activation energy

c)

it increases the energy of particle collisions

d)

it increases the frequency of particle collisions

92.
Grinding a seltzer tablet into powder increases the rate of reaction due to increased
a)
concentration
b)
surface area
c)
temperature
d)
reactants
93.
A ______________ is a substance that increases the rate of a reaction without being used up during the reaction. 
a)
catalyst
b)
product
c)
reactant
d)
solute
94.

Why does a higher temperature increase the rate of a reaction?

a)

It increases both the frequency of collision and energy of reactant particles

b)

It only increases the frequency of collision

c)

It only increases the energy of reactant particles

d)

It reduces the activation energy of the reaction

95.

Four light sticks are placed in water baths of varying temperatures. At which temperature would the light stick glow the brightest?

a)

0° C

b)

20° C

c)

30° C

d)

40° C

96.

Enzymes in your body act as catalysts. Thus, the role of enzymes is to___________.

a)

inhibit chemical reactions.

b)

increase the rate of chemical reactions.

c)

decrease the rate of chemical reactions.

97.

Which temperature had the highest reaction RATE?

a)

52

b)

42

c)

32

d)

22

98.

What is the responding variable in this experiment?

a)

temperature of the water

b)

time to complete the reaction

c)

reaction rate

d)

amount of water

99.

What trend is shown in the data?

a)

When the temperature increases the reactione time increases

b)

When the temperature increases the reactione time decreases

c)

Temperature and reactiom time are the same

d)

When the reactiontime decreases the temperature increases

Similar Resources on Wayground

Ultimate Frisbee

10 questions

Ultimate Frisbee

quiz

Worksheet

•

9th - 12th Grade

YEAR 5 ICT BRAIN TEASER

10 questions

YEAR 5 ICT BRAIN TEASER

quiz

Worksheet

•

5th Grade

Q4-MATH-QUIZ-1

10 questions

Q4-MATH-QUIZ-1

quiz

Worksheet

•

3rd Grade

PENGEMBANGAN DIRI 3 PEDAGOGIK 3

10 questions

PENGEMBANGAN DIRI 3 PEDAGOGIK 3

quiz

Worksheet

•

2nd Grade

4TH-SOCIAL STUDIES

10 questions

4TH-SOCIAL STUDIES

quiz

Worksheet

•

4th Grade

Lúdica y Creatividad Evaluación Final

10 questions

Lúdica y Creatividad Evaluación Final

quiz

Worksheet

•

University

Bienes y sus tipos

10 questions

Bienes y sus tipos

quiz

Worksheet

•

2nd Grade

Pembelajaran 1

10 questions

Pembelajaran 1

quiz

Worksheet

•

7th - 8th Grade