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chemistry test practice questions

Total questions: 51

Worksheet time: 31mins

Name
Class
Date
1.

If you see this symbol what does it mean about the item

a)

it's poisonous

b)

It is under pressure

c)

It is explosive

d)

It can harm the environment

2.

If you see this symbol what does it mean about the item

a)

It is under pressure

b)

It is flamable

c)

It is oxidizing

d)

It is corrosive

3.

If you see this symbol what does it mean about the item

a)

It is oxidizing

b)

It is Explosive

c)

It is poisonous

d)

It is fllammable

4.

If you see this symbol what does it mean about the item

a)

It is Explosive

b)

It is under pressure

c)

It is harmful for the environment

d)

It is poisonous

5.

If you see this symbol what does it mean about the item

a)

It is harmful for the environment

b)

It is corrosive

c)

It is poisonous

d)

it is explosive

6.

If you see this symbol what does it mean about the item

a)

It is poisonous

b)

It is harmful

c)

It is harmful for the enviroment

d)

It is a health hazard

7.

If you see this symbol what does it mean about the item

a)

It is a serious health hazard

b)

It is harmful for the environment

c)

It is harmful to your health

d)

It is flammable

8.

If you see this symbol what does it mean about the item

a)

It is harmful for the environment

b)

It is poisonous

c)

It is corrosive

d)

It is a serious health hazard

9.

If you see this symbol what does it mean about the item

a)

It is harmful

b)

It is harmful for the environment

c)

It is poisonous

d)

It is a health hazard

10.

If you see this symbol what should you do with the container

a)

Put it in burnable

b)

put it in plastics

c)

Take it to the recycling center

d)

Put it in your compost

11.

A type of chemical bond that is

formed from the attraction of an atom that has lost an electron for an atom that has gained an electron is called a(n)

a)

Covalent bond

b)

Ionic bond

c)

Metallic bond

d)

Hydrogen bond

12.

A type of chemical bond that

where atoms share electrons to make a full outer shell

a)

Covalent bond

b)

Ionic bond

c)

Metallic bond

d)

Hydrogen bond

13.

Which two elements have the same number of valence electrons?

a)

Carbon and Aluminum

b)

Boron and Carbon

c)

Nitrogen and Phosphorus

d)

Oxygen and Fluorine

14.

How many electrons does magnesium need to give away to have a full outer shell

a)

2

b)

1

c)

3

d)

0

15.

The black dots represent valence electrons how many electrons are needed for a filled outermost energy level?

a)

0

b)

1

c)

8

d)

7

16.

When atoms lose electrons during chemical bonding, they become

a)

Positively charged ions

b)

Negatively charged ions

c)

Neutral ions

d)

Chemically charged ions

17.

The diagram shows what type of chemical bond?

a)

Covalent

b)

Ionic

c)

Metallic

d)

Hydrogen

18.

HCl is an example of what type of bond?

a)

Covalent bond

b)

Ionic bond

c)

Metallic bond

d)

Hydrogen bond

19.

Which statement is true about the picture?

a)

The bond is ionic because electrons are being shared.

b)

The bond is ionic because electrons are being transferred

c)

The bond is covalent because electrons are being shared.

d)

The bond is covalent because electrons are being transferred.

20.

What family on the periodic table does not bond with other atoms?

a)

Halogens

b)

Noble gases

c)

Alkali Metals

d)

Alkaline-metals

21.

How many valence electrons are shown in the atom?

a)

2

b)

8

c)

5

d)

3

22.

What do the following items

have in common: pizza, cup of water, soup, puppy?

a)

They are all solid

b)

they are all liquids

c)

they are all alive

d)

They are all made of atoms

23.

What is true about the circled elements?

a)

They are nonmetals

b)

They have a full outer shell

c)

They will become negative ions

d)

They have one valence electron

24.

according to the octet rule how many electrons do atoms want in their outer shell

a)

1

b)

8

c)

7

d)

4

25.

What kind of chemical bond is

shown in the picture below?

a)

Ionic

b)

mettallic

c)

covalent

d)

colloid

26.

How many valence electrons does group 17 have?

a)

1

b)

2

c)

7

d)

17

27.

Which of the following is

held together by an ionic bond?

a)

CO2

b)

H2O

c)

SO2

d)

CaCl2

28.

Which atom would become

an ion with a + charge?

a)

Nitrogen

b)

Magnesium

c)

Chlorine

d)

Carbon

29.

How many valence electrons

does the Fluorine atom need to gain to have a full outer energy level?

a)

0

b)

1

c)

7

d)

8

30.

Which of these is a covalent bond

a)

Nacl

b)

CO2

c)

MgO

d)

LiF

31.
A ____________is the force that holds atoms together in a compound.
a)
Chemical Formula
b)
Chemical Reaction
c)
Chemical Bond
d)
Synthesis Reaction
32.
What two elements make up water?
a)
Helium and oxygen
b)
Hydrogen and oxygen
c)
helium and carbon
d)
oxygen and carbon
33.
What word describes when water is attracted to other substances?
a)
cohesion
b)
adhesion
c)
capillary action
d)
surface tension
34.
Attractions between the negative Oxygen atom of one water molecule and the positive Hydrogen atom of another water molecule are called
a)
Covalent bonds
b)
Ionic bonds
c)
Polar bonds
d)
Hydrogen bonds
35.
Why does ice float?
a)
As water freezes, it expands and its density decreases.
b)
As water freezes, it takes up more hydrogen from the atmosphere, causing it to have a greater buoyancy.
c)
As water freezes, air becomes trapped between the hydrogen bonds of water molecules.
d)
As water freezes, it takes up more oxygen from the atmosphere, causing it to have a greater buoyancy.
36.
Which end of the water molecule has a slightly positive charge?
a)
the oxygen end
b)
the hydrogen end
c)
both ends are slightly positive
d)
neither end is positive
37.
Water is a universal solvent because it...
a)
It can be found anywhere
b)
It freezes when it gets cold
c)
floats when frozen
d)
Dissolves most substances
38.
Which of the following is LEAST likely to dissolve in water?
a)
nonpolar fats and oils
b)
polar sugar molecules
c)
salt made of a positive sodium ion and a negative chloride ion
d)
all of the substances will dissolve easily in water
39.
Large bodies of water, such as lakes and oceans, do not quickly fluctuate in temperature. What is the reason for this phenomenon?
a)
Water is an acid.
b)
Water is a versatile solvent.
c)
Water has a high heat capacity.
d)
 Water acts as a buffer.
40.
 Small insects can walk across the surface of calm water. Their feet push the surface of the water down slightly, somewhat like a person walking across a trampoline, but they do not break the surface. What is the best explanation for why this happens?
a)
The insects are light enough so that they do not break the hydrogen bonds holding the water molecules together
b)
The insects actually use their wings to hover slightly above the water's surface and they only skim it with their feet
c)
The insects' feet are non-polar, so they are repelled by the polar water molecules and are pushed away from the water's surface
d)
The insects are small enough to see the individual water molecules, so they are able to step carefully from one molecule to the next
41.
Why does water move from the roots to the leaves of plants?
a)
Water is pushed by solutes
b)
Capillary action pulls the water molecules like a chain
c)
Water is pulled by gravity
d)
Water’s cohesion causes it to “pull” towards the leaves
42.
In a water molecule the hydrogen and oxygen atoms hold together by sharing _________.
a)
protons 
b)
neutrons
c)
electrons
d)
nuclei
43.
When a molecule has an opposite electrical charge on each end, it is known as what?
a)
cohesion
b)
polar molecule
c)
hydrogen bond
d)
solution
44.
When water molecules stick easily to other water molecules, this is called what?
a)
cohesion
b)
adhesion
c)
solution
d)
polar molecule
45.
Water molecules are attracted to other kinds of molecules because of the property.
a)
Cohesion
b)
Adhesion
c)
Surface Tension
d)
Universal Solvent
46.
Which is NOT a unique property of water?
a)
Frozen water floats on liquid water.
b)
Water covers most of the Earth’s surface and retains a large amount of heat.
c)
Water molecules stick to each other through hydrogen bonds.
d)
Water cools very rapidly.
47.
What property of water helps to moderate earth's temperature?
a)
adhesion
b)
chohesion
c)
Specific heat capacity
d)
Latent heat of vaporization
48.
Water is polar because...
a)
The unequal sharing of electrons gives the water molecule a slight negative charge near its oxygen atom and a slight positive charge near its hydrogen atoms.
b)
The molecule has two poles, at which the it is colder than other regions of the molecule.
c)
The unequal sharing of electrons gives the water molecule a slight negative charge near its hydrogen atoms and a slight positive charge near its oxygen atom.
d)
The water molecule is neutral.
49.
Which types of compounds dissolve easily in water?
a)
Polar and Nonpolar
b)
Polar and Ionic
c)
Nonpolar and Ionic
d)
Covalent and Nonpolar
50.

The bond that holds the Oxygen and Hydrogen atoms together in a water molecule is a ________ bond.

a)

ionic

b)

Hydrogen

c)

Covalent

d)

Weak

51.

_________ bonds form between ions.

a)

ionic

b)

covalent

c)

hydrogen

d)

polar

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