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Key Concept 2.1: Classification and Interactions of Matter

Total questions: 61

Worksheet time: 2hrs 23mins

Name
Class
Date
1.
This picture represents: 
a)
Element
b)
Compound
c)
Mixture of Elements
d)
Mixture of Compounds
2.
What type of mixture is this?
a)
homogenous mixture
b)
chemical
c)
heterogeneous mixture 
d)
solid mix
3.
A substance with two or more elements that are combined in a fixed proportion
a)
colloid
b)
compound
c)
element
d)
solution
4.
A substance in which all the atoms are the same
a)
colloid
b)
homogeneous mixture
c)
solution
d)
element
5.
A mixture that contains two or more substances blended evenly throughout
a)
heterogeneous mixture
b)
homogeneous mixture
c)
suspension
d)
colloid
6.
Which of the following is an element?
a)
Sugar
b)
Salt
c)
Water
d)
Oxygen
7.
This picture represents which of the following?
a)
element
b)
compound
c)
mixture
8.
A combination that can be separated by physical processes is a .....
a)
Pure Substance
b)
Glucose
c)
Element
d)
Mixture
9.
A mixture that is NOT evenly distributed is called ....
a)
Compounded
b)
Homogenous
c)
Heterogenous
d)
Salty
10.
If you change a substance into a new substance...
a)
Partial Change
b)
Physical Change
c)
Chemical Change
d)
Freezing
11.
Changing the phase, size or shape of something....
a)
Chemical change
b)
Physical Change
c)
Suspension
d)
Colloid
12.
Which is NOT a chemical change?
a)
Leaves changing colors in the fall
b)
Iron rusting
c)
Digesting Lunch
d)
Ice Melting
13.
Which one of these pictures represents a mixture? 
a)
1
b)
2
c)
3
d)
1, 2 and 3
14.
Is burning wood a chemical or physical change?
a)
chemical
b)
physical
15.

This is an example of what technique?

a)

filtration

b)

distillation

c)

chromatography

d)

sublimation

16.

What is the difference between a mixture and a pure substance?

a)

A mixture has only one type of particle present.

b)

A pure substance has only one type of particle present.

c)

The size of the particles.

d)

There is no difference.

.

17.

Which one of these is NOT a way to physically separate a mixture?

a)

sublimation

b)

distillation

c)

filtration

d)

chromatography

18.

How can you tell which substance in a chromatography is the MOST polar? (The solvent is water.)

a)

The substance with the smallests Rf.

b)

The substance that DOESN'T move.

c)

The substance that travelled the LONGEST DISTANCE from the starting point.

d)

The substance that travelled the SHORTEST DISTANCE from the starting point.

19.

What is the relationship between temperature and average kinetic energy?

a)

The higher the temperature the higher the average kinetic energy.

b)

The higher the temperature the lower the average kinetic energy

c)

The lower the temperature the higher the average kinetic energy

d)

They are only friends.

20.

At the particle level, explain what MUST happen for a substance to boil?

a)

The particles have to lose enough energy that they begin to stick together.

b)

The particles have to gain enough energy that the INTERMOLECULAR forces holding them together break.

c)

The particles have to gain enough energy that the INTRAMOLECULAR forces holding them together break.

d)

The energy and the force are not related to this question.

21.

The air in a pressurized SCUBA diving tank contains the following gases: oxygen at a pressure of 64 atm, nitrogen at a pressure of 130 atm, and argon at a pressure of 6 atm. What is the total gas pressure in the tank?

a)

1 atm

b)

60 atm

c)

100 atm

d)

200 atm

22.

The formula for density.

a)

mass/volume

b)

temperature/volume

23.

What is filtration?

a)

A method used to separate a solid from a liquid that dissolves in the liquid

b)

A separating technique used to separate a mixture of a solid and liquid where the solid does not dissolve in the liquid

24.

Th components of filtration are separated based on

a)

boiling point

b)

solubility

c)

particle size

25.
Evaporation occurs when water changes into 
a)
transpiration
b)
snow
c)
solid
d)
vapor
26.

Which process is faster?

a)

Boiling

b)

Evaporation

c)

Both

27.

Which process is the change of state from liquid to gaseous?

a)

Boiling

b)

Evaporation

c)

Both

28.
How do you separate iron filings from sand?
a)
You can use a filter.
b)
You can use a fagnet.
c)
You can use a magnet.
d)
You can use all of the methods!
29.
Separating particles based on size.
a)
chromatography
b)
decantation
c)
distillation
d)
Filtration
30.
Separating mixtures based on boiling points.
a)
Desalination
b)
Distillation
c)
Decantation
d)
Condensation
31.
How do covalent bonds form?
a)
Donating & receiving valence e- between atoms.
b)
Opposite slight charges attract each other between compounds.
c)
Scientists are still not sure how they form.
d)
Sharing valence e- between atoms.
32.
What do we call a covalent bond where electrons are shared UNEVENLY or UNEQUALLY?
a)
Ionic
b)
Polar Covalent
c)
Nonpolar Covalent
d)
Van der Waals Force
33.
Why do elements bond?
a)
To be friends
b)
To create a new element
c)
To become stable
34.

Which is NOT an intramolecular force?

a)

Polar Covalent Bond

b)

Nonpolar Covalent Bond

c)

London Dispersion Force

d)

Ionic Bond

35.

Which structure consists of a giant lattice of regularly arranged cations surrounded by a sea of delocalized electrons.

a)

ionic bonding

b)

metallic bonding

c)

covalent bonding

36.

Which of the following is an intramolecular force?

a)

hydrogen bonding

b)

covalent bonding

37.

Which intermolecular force is characterized by partially oppositely charged ions?

a)

Dipole-dipole

b)

Hydrogen bonding

c)

London dispersion forces

38.

Which substance has the weakest intermolecular forces?

a)

Substance A, boiling point of 75 °C

b)

Substance B, boiling point of 105 °C

c)

Substance C, boiling point of 25 °C

d)

Substance d, boiling point of 45 °C

39.

The weaker the intermolecular forces of a substance the _____________ the boiling point

a)

higher

b)

lower

40.

________________________ have the strongest intermolecular forces of attraction.

a)

Dipole- Dipole

b)

Dispersion

c)

Hydrogen Bonds

41.
Hydrogen bonding occurs when hydrogen is bonded to N, O, or F.  Which of the following has hydrogen bonding?
a)
CBr4
b)
NO2
c)
H2S
d)
NH3
42.
What explains the very high melting and boiling point of water
a)
Strong dipole-dipole bonds between water molecules
b)
Strong hydrogen bonds between water molecules
c)
Dispersion forces which are present in all molecules
d)
Asymmetrical shape of the polar bonds.
43.
Does H2O have hydrogen bonding?
a)
yes
b)
no
44.
Does H2S have hydrogen bonding?
a)
yes
b)
no
45.
Rank these in order of strength:
covalent bond
London forces
hydrogen bond
dipole-dipole attraction
a)
dipole-dipole>covalent bond>hydrogen bond>London
b)
London>dipole-diple>hydrogen bond>covalent bond
c)
covalent bond>hydrogen bond>dipole-dipole>London
d)
hydrogen bond>dipole-dipole>London>covalent bond
46.
Two or more substances that are mixed together but not chemically combined is a ___
a)
compound
b)
mixture
c)
keratin
d)
chromatography
47.

Ink can be separated by a method of -----------------------------------------------

a)

distillation

b)

filtration

c)

chromatography

d)

sedimentation

48.
A pure substance shows ------------------ spot on chromat gram
a)
0
b)
1
c)
2
d)
3
49.
The Rf value  for the blue component is 
a)
0.3
b)
0.7
c)
10
d)
3
50.
The Rf value  for the red component is 
a)
0.3
b)
0.7
c)
10
d)
7
51.

The mixture on the left contains...

a)

All three dyes

b)

None of the dyes

c)

Dye 1 and Dye 2

d)

Dye 1 and Dye 3

e)

Dye 2 and Dye 3

52.

The dye with the HIGHEST Rf value will be...

a)

Dye 1

b)

Dye 2

c)

Dye 3

d)

All have the same Rf value

53.

Which equation represents Dalton's Law?

a)

E = mc2

b)

PV = nRT

c)

P1 / T1 = P2 / T2

d)

Ptotal = P1 + P2 + P3

54.

Which container will have a lower pressure?

a)

left

b)

right

c)

they both have the same pressure

55.

A mixture of H, Ne, & O has a pressure of 12.4 atm. If Hydrogen measures 5.6 atm and Oxygen measures 2.0 atm, what is the pressure of Neon?

a)

7.6 L

b)

4.8 L

c)

5.4 L

d)

12.0 L

56.

In a mixture of gases at 32.3 atm, Nitrogen gas makes up 60%. What is the partial pressure of the N2?

a)

5.38 atm

b)

26.3 atm

c)

19.4 atm

d)

12.9 atm

57.

A container holds three gases: oxygen, carbon dioxide, and helium. The partial pressures of the three gases are 2.00 atm, 3.00 atm, and 4.00 atm, respectively. What is the total pressure inside the container?

a)

900 atm

b)

0.90 atm

c)

9.00 atm

d)

920 atm

58.

A mixture of nitrogen and oxygen gas has a total pressure of 4.2 atm. If 4/7 of the mixture is N2, what is the partial pressure of O2?

a)

2.4 kPa

b)

2.4 atm

c)

1.8 kPa

d)

1.8 atm

59.

A mixture of two gases with a total pressure of 520 mmHg is enclosed in a sealed container. If 70% of the mixture is NO2, what is the partial pressure of the other gas?

a)

520 mmHg

b)

364 mmHg

c)

156 mmHg

60.

A sample of four mixed gases is at 760 mmHg. The partial pressures of gases A= 14. 8% and B = 41.6%. If gases C and D have equal partial pressures, what is the partial pressure of gas C?

a)

331.36 mmHg

b)

165.68 mmHg

c)

428.64 mmHg

61.
What is electrolysis?
a)
breaking down of a compound using a current
b)
making a compound using a current

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