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Total questions: 100

Worksheet time: 2hrs 21mins

Name
Class
Date
1.

Which of the following substances would conduct electricity if dissolved in water to form a solution?

a)

C6H12O6

b)

CH4

c)

KI

d)

CO2

2.

A conductivity tester is placed in a solution of water and an unknown solute. The bulb doesn't light up. What can you determine about the unknown solute?

a)

It is an ionic compound.

b)

It is a metallic compound.

c)

It is a covalent compound.

d)

Not enough information is given to answer this question.

3.

Which solution will have a higher conductivity?

a)

Left one, since it is concentrated

b)

Right one, since it is concentrated

c)

Left one, since it is diluted

d)

Right one since it diluted.

4.

Which of the following will conduct electricity when dissolved to make a solution?

a)

KCl

b)

NH3

c)

CO2

d)

C12H22O11

5.

A light bulb connected to two electrodes is immersed in the following solutions. Which one will make the light bulb light up the brightest?

a)

1 g of sugar in 1 cup of water

b)

1 g of salt in 1 cup of water

c)

10 g of salt in 1 cup of water

d)

10 g of sugar in 1 cup of water.

6.

When the amount of solute increases, the concentration and conductivity (a)   . (One word)

7.

Which of the following will produce ions to conduct electricity when dissolved in water?

a)

CaCl2

b)

NH3

c)

CH4

d)

P2O5

8.

What can you conclude based on the diagram? There could be more than one correct answer.

a)

Liquid A a concentrated ionic solution

b)

Liquid B is a concentrated ionic solution

c)

Liquid A is a concentrated covalent solution.

d)

Liquid B is a concentrated covalent solution.

9.

A beaker of uncovered salt water is left in the lab. What happens to the conductivity after a week?

a)

The conductivity decreases since the concentration decreases as the water evaporates

b)

The conductivity increases, since the concentration decreases as the water evaporates.

c)

The conductivity decreases, since the concentration increases as the water evaporates.

d)

The conductivity increases, since the concentration increases as the water evaporates.

10.

What happens to the concentration and conductivity, when you increase the amount of solvent in a solution?

a)

The concentration increases and conductivity increases.

b)

The concentration increases and the conductivity decreases.

c)

The concentration decreases and the conductivity decreases.

d)

The concentration decreases and the conductivity increases.

11.

What happens to the concentration and conductivity, when you increase the amount of solute in a solution?

a)

The concentration increases and conductivity increases.

b)

The concentration increases and the conductivity decreases.

c)

The concentration decreases and the conductivity decreases.

d)

The concentration decreases and the conductivity increases.

12.

What happens when KBr is dissolved in water?

a)

Br - ions are attracted to positive K ions

b)

Br - ions are attracted to the oxygen atom of water

c)

K+ ions are attracted to the hydrogen atoms of water

d)

no attractions are involved

13.
What is a substance that is dissolved in another substance? 
a)
solution
b)
solute
c)
solvent
d)
compound
14.
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
15.

Which of the following is dilute?

a)

10 g of sugar in 10g of water

b)

10 g of sugar in 20 g of water

c)

20g of sugar in 20 g of water

d)

20 g of sugar in 10 g of water

16.

Which of the following solutions is concentrated?

a)

10 g of sugar in 10g of water

b)

10 g of sugar in 20 g of water

c)

20g of sugar in 20 g of water

d)

20 g of sugar in 10 g of water

17.

Which of the following increase the rate of conductivity?

a)

Large surface area

b)

Large temperature difference

c)

Small surface area

d)

Small temperature difference

18.

If a metal has fewer free electrons than it's conductivity is lower

a)

TRUE

b)

FALSE

19.

If the particles in a conductor are more tightly packed it will have a smaller conductivity

a)

TRUE

b)

FALSE

20.

The best insulator would have...

a)

Loosely bound particles that are spread out.

b)

Tightly bound particles that are close together.

c)

Tightly bound particles and lots of free electrons.

d)

No particles at all, it would be a vacuum.

21.

Select ALL the pieces of evidence that a chemical reaction has occurred.

a)

Precipitate formation

b)

Mass

c)

Change in smell/color

d)

Gas produced

e)

Change of properties

22.

A ________________ forms from two liquids mixing in a chemical reaction.

a)

reaction

b)

product

c)

reactant

d)

precipitate

23.

What are the reactants in the picture?

a)

2 sodium and 2 chlorine

b)

1 sodium and 1 chlorine

c)

1 sodium and 2 chlorine

24.

A mystery powder was found on the counter of the science classroom. Use the information to identify the powder. The powder is soluble in water, does not change color in iodine and has a density of 1.6.

a)

The substance is salt.

b)

The substance is sugar.

c)

The substnce is flour.

d)

The substance is cornstarch.

25.

Which type of chemical reaction evidence is shown in the picture?

a)

Change in odor

b)

Change in color

c)

Formation of precipitate

d)

Gas produced

26.

What are the products in the picture?

a)

sodium and water

b)

sodium and sodium hydroxide

c)

water and hydrogen

d)

sodium hydroxide and hydrogen

27.

Choose which types of chemical reaction evidence are shown in the picture.

a)

Change in odor

b)

Change in color

c)

Formation of precipitate

d)

Gas produced

28.

A mystery powder was found on the counter of the science classroom. Use the information to identify the powder. The powder is insoluble in water, does change color in iodine and has a melting point of 257.

a)

The substance is salt.

b)

The substance is sugar.

c)

The substnce is flour.

d)

The substance is cornstarch.

29.

Which type of chemical reaction evidence is shown in the picture?

a)

Change in odor

b)

Change in color

c)

Formation of precipitate

d)

Gas produced

30.

Suzie wants to buy a ring for her mother. The ring she finds is not magnetic and a density of 11.35. What melting point should she test for?

a)

660.3

b)

961.8

c)

449.5

d)

327.5

31.

The image shows 3 vials that appear to be unchanged. How could you determine if a chemical reaction occurred when you cannot observe a visible change? Select all that are correct.

a)

I could find the density of the reactants and compare to the product.

b)

I could find the mass of the reactants and compare to the product.

c)

I could smell of the reactants and compare to the product.

d)

I could find the boiling point of the reactants and compare to the product.

32.

Which type of chemical reaction evidence is shown in the picture?

a)

Change in properties

b)

Change in color

c)

Formation of precipitate

d)

Gas produced

33.

Suzie wants to buy a ring for her mother. The ring she finds is not magnetic and a melting point of 660.3. What should the density test show?

a)

10.49

b)

7.31

c)

2.7

d)

11.35

34.

Solubility (dissolves)

a)

Physical Proeprty

b)

Chemical Property

35.
Density
a)
Physical Property
b)
Chemical Property
36.
Blue Color
a)
Physical Property
b)
Chemical Property
37.
Is milk going sour a physical or chemical change?
a)
Physical 
b)
Chemical
38.
Reacts with Water: Chemical or Physical Property
a)
Chemical Property
b)
Physical Property
39.
Ability to rust is this type of property:
a)
Physical property
b)
Chemical property
40.
Is Gatorade powder dissolving in water physical or chemical change?
a)
Physical 
b)
Chemical
41.
Which one of these is a chemical property?
a)
melting point
b)
boiling point
c)
color
d)
flammability
42.
Solubility is defined as
a)
the ability to catch on fire
b)
the ability to be dissolved
c)
the ability to fly.
d)
the ability to get on Mrs. D's nerves.
43.
The substance being dissolved in a solution.
a)
sands
b)
solute
c)
solvent
d)
alloy
44.
The substance in which a solute is dissolved
a)
sands
b)
solvent
c)
alloy
d)
negative particles
45.
Solutions are composed of __________ .
a)
salts and solutes
b)
solvents and salts
c)
solutes and alloys
d)
solutes and solvents
46.
In a sample of salt water, NaCl would be considered the ______.
a)
Solution
b)
Solute
c)
Solvent
d)
Solvation
47.
If we are making Kool-aid with sugar, Kool-aid powder, and water, which part is the solvent?
a)
water
b)
powder
c)
sugar
d)
powder and sugar
48.
In this mixture, which of the following will be the solute?
a)
The water in the glass
b)
The glass that holds the final mixture
c)
The solution containing both powder and water
d)
The powder on the spoon
49.
Lemonade - Water, lemon juice, and sugar
Identify the solute
a)
water
b)
lemon juice
c)
sugar and lemon juice 
50.
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
51.
What is a compound? 
a)
 the simplest form of a substance 
b)
a combination only of 3 elements 
c)
a combination of 2 or more elements 
d)
a place where people are held 
52.
What is the simplest form that cannot be broken down to anything simpler? 
a)
element 
b)
solution
c)
compound
53.
The flammability of a substance is 
a)
A. a chemical property.
b)
B. related to the density
c)
C. a physical property.-
d)
D. changeable.
54.
What is a pure substance made of two or more elements that are chemically combined called?
a)
A. element
b)
B. compound     
c)
C. mixture
d)
D. solution
55.
When materials combine to form a mixture, they
a)
A. keep their original properties.
b)
B. react to form a new substance with new properties.
c)
C. combine in a specific ratio.
d)
D. always change their physical state.
56.
If a spoonful of salt is mixed in a glass of water, what is the water called?
a)
A. solute
b)
B. solution
c)
C. solvent
d)
D. element
57.
A pure substance that cannot be separated into simpler substances by chemical or physical means.  
a)
Element
b)
Compound
c)
Mixture
d)
Chemical
58.
Which of the following is not a compound?
a)
HCl
b)
Cl
c)
NaCl
d)
CO2
59.
What is Newton's First Law
a)
F=ma
b)
Every action has an equal and opposite reaction
c)
An object at rest stays at rest, an object in motion stays in motion. 
d)
Friction 
60.
What is the speed of an object that travels 20 meters in 4 seconds?
a)
80 m/s
b)
0.2 m/s
c)
5 m/s
d)
24 m/s
61.
What pulls a ball back to earth?
a)
Gas
b)
Gravity
c)
Friction
d)
Molecules
62.

A group of students were working on an investigation involving the states of matter. During the investigation they filled two beakers with different amounts of water, as shown below.


A student stirs 2 grams salt into each beaker. After a few minutes, which of the following will most likely happen?

a)

The salt will dissolve in Beaker A but not in Beaker B.

b)

The salt will dissolve in both beakers.

c)

The salt will not dissolve in Beaker A but will dissolve in Beaker B.

d)

The salt will not dissolve in either beaker.

63.

Which of the following mixtures could NOT be separated using a magnet?

a)

A mixture made up of iron filings and sand

b)

A mixture made up of a steel ball bearings and water

c)

A mixture of copper pennies and sand

d)

A mixture of copper pennies and iron filings

64.

A student made four mixtures during science class. The table below lists the ingredients used in each mixture.


Which two mixtures are made up entirely of solids?

a)

Mixture M and Mixture N

b)

Mixture N and Mixture O

c)

Mixture O and Mixture P

d)

Mixture M and Mixture P

65.

Some ways to separate mixtures are listed below.


A student is given a solution of water and sugar. She then added sand to the mixture. Which two steps would she most likely use to separate the mixture back into water, sugar, and sand?

a)

First 1 then 2

b)

First 2 then 3

c)

First 3 then 4

d)

First 2 then 4

66.

A student had two beakers which he labeled X and Y. He filled both beakers with the same amount of water. He stirred two teaspoons of sugar into Beaker X and two teaspoons of sand into Beaker Y. He then set both beakers on a table and left them there for several minutes. When he returned, he

observed that sand was on the bottom of Beaker Y, but there was no sugar on the bottom of Beaker X. Which of the following best explains the student’s

observations?

a)

Both beakers contained solutions.

b)

Neither beaker contained a solution.

c)

Beaker X contained a solution but Beaker Y did not.

d)

Beaker Y contained a solution but Beaker X did not.

67.

A group of students placed the items shown below on their lab table.


The students placed all of the items into a container and mixed them up. The mixture would be easy to separate because all of the items –

a)

are solids

b)

are more dense than water

c)

are attracted to a magnet

d)

all of the above

68.

For an investigation, a student put 100 mL of water into each of three beakers. Then the student added a copper cube to Beaker W, 5 g of salt to Beaker X, and 10 mL of vegetable oil to Beaker Z. The student stirred the contents of the beakers and then left them sitting on a lab table for 5 minutes.


Which of the following will most likely be the result of this investigation?

a)

Both the copper cube and the salt powder will dissolve, and the vegetable oil will settle on the top of the water.

b)

The copper cube will sink to the bottom, and both the salt powder and the vegetable oil will dissolve.

c)

Both the copper cube and the salt powder will sink to the bottom, and the vegetable oil will dissolve.

d)

The copper cube will sink to the bottom, the salt powder will dissolve, and the vegetable oil will settle on the top of the water.

69.

A student places several plastic beads in a beaker of water.


Which statement best describes the outcome of this procedure?

a)

The beads and the water traded physical properties.

b)

The beads and the water mixed their physical properties.

c)

The beads and the water kept the physical properties they already had.

d)

The beads and the water took on new physical properties neither had.

70.

Several students mixed different substances with water.


Which student, or students, produced a solution with a color different from that of water?

a)

1 only

b)

1 and 4

c)

3 only

d)

2, 3 and 4

71.

A teacher mixes a gray powder and a black powder. A student examines the mixture and sees black and gray grains.


What conclusion does the student’s observation support?

a)

The powders kept their physical properties after mixing.

b)

The powders had the same density.

c)

The powders were both insoluble in water.

d)

The powders both had the same physical properties after mixing.

72.

Which of the following describes covalent bonds?

a)

Bonds form because of opposite charges

b)

electrons are shared to fill outer electron shells

c)

Electrons are transferred between atoms

d)

Covalent bonds are magical

73.
What is ionization energy?
a)
Energy needed to destroy an atom
b)
Energy required to remove an electron
c)
Energy needed to split an electron
d)
Energy required to add an electron
74.
What elements generally make a covalent bond?
a)
metal and nonmetal
b)
2 or more nonmetals
c)
metal
d)
none of the above
75.
Electronegativity is...
a)
how good an atom is at attracting electrons
b)
the ability of an atom to lose electrons
c)
the energy required to remove an electron from a specific atom
d)
how easy it is to make friends. 
76.

Ice has less density as compared to water due to ___________ bonds.

a)

ionic

b)

hydrogen

c)

covalent

d)

metallic

77.

Water molecules tend to make _____________ bonds with each other.

a)

ionic

b)

polar covalent

c)

metallic

d)

hydrogen

78.

Which of the following ionic compounds would have the highest lattice energy?

a)

LiCl

b)

BeCl2

c)

CCl4

79.

What properties does an ionic compound have?

a)

A low boiling point and it conducts electricity when dissolved in water

b)

A high melting and it conducts electricity when liquid

c)

A high boiling point and it conducts electricity when solid

80.

Universal indicator is added to a solution. The solution turns purple. The solution contains

a)

citric acid

b)

hydrochloric acid

c)

sodium hydroxide solution

d)

only water

81.

This substance releases OH- into solution

a)

Acid

b)

Base

c)

Neutral

82.

Which solution releases H+ in solution?

a)

Base

b)

Acid

c)

Buffer

d)

Water

83.

6. Which of these processes is always exothermic?

a)

A. evaporation

b)

B. burning

c)

C. insulation

d)

D. melting

84.

1. Equal amounts of four different substances (A-D) where added separately to equal amounts of an acid and a thermometer placed in the mixture. For which substance is the reaction the most exothermic?

a)

A. temperature rises by 3 °C\degree C    

b)

B. temperature falls by 5 °C\degree C   

c)

C. temperature falls by 3 °C\degree C    

d)

D. temperature rises by 5 °C\degree C  

85.
During an endothermic reaction in a beaker if we are part of the surroundings and touched the beaker, it would feel _______. 
a)
Warm
b)
Cold
86.
Is photosenthysis an Exothermic or an Endothermic reaction?
a)
Endothermic
b)
Exothermic
87.

Temperature is...

a)

A measure of the potential energy stored in a substance

b)

The same as heat

c)

A measure of the random motions of the components of a substance

88.

What type of reaction is this?

a)

Exothermic

b)

Endothermic

c)

Energy Producing

d)

No way to tell

89.
Define 'Enthalpy'
a)
a) Energy stored in the movement of molecules in a substance
b)
b) The opposite of temperature
c)
c) The temperature of a molecule
d)
d) Energy stored in the chemical bonds in a substance
90.
A catalyst works by
a)
changing the order of the reaction
b)
increasing the temperature
c)
lowering the activation energy
d)
making the activated complex
91.
ΔH value in an endothermic reaction is a positive number.
a)
True
b)
False
92.

The law of conservation of energy states that

a)

energy can be created or destroyed

b)

energy cannot be created or destroyed

c)

energy can be potential or kinetic only

d)

heat energy is kinetic energy

93.

During an endothermic reaction, heat is ________ and chemical bonds _______.

a)

released, formed

b)

absorbed, broken

c)

released, broken

d)

absorbed, formed

94.

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

a)

released, formed

b)

absorbed, broken

c)

released, broken

d)

absorbed, formed

95.
Do reactants in an endothermic reaction have a higher or lower energy than the products? 
a)
Higher
b)
Lower
96.

deliquescence substances are ____________

a)

a) dissolve in water

b)

b) do not dissolve in water

97.

hygroscopic substances is ________

a)

a) do not dissolve in water

b)

b) dissolve in water

98.

Which type of reaction can be a precipitate reaction?

a)

synthesis reaction

b)

single replacement reaction

c)

double replacement reaction

d)

combustion reaction

99.

Solids whose particles are not arranged in any particular pattern

a)

Amorphous

b)

Crystalline

c)

Concentrated

d)

Dilute

100.

A force acting on the surface of a liquid that causes dew drops to be spherical

a)

Gravity

b)

Friction

c)

Surface Tension

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