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Seperaating Techniques and Cooling curves

Total questions: 50

Worksheet time: 2hrs 30mins

Name
Class
Date
1.

Between which points is the temperature of the substance remaining constant?

a)

A-B only

b)

A-B, C-D, and E-F

c)

B-C only

d)

B-C and D-E

2.

The melting point of the sample is

a)

-60 ºC

b)

20 ºC

c)

60 ºC

d)

100 ºC

3.

Which letter indicates where water is in both the solid and liquid phase at the same time?

a)

A

b)

B

c)

C

d)

D

e)

E

4.

In which region(s) does temperature increase?

a)

Region C only

b)

Regions B and D

c)

Regions A, C, and E

d)

Regions A and B

5.

In which region(s) of the heating curve would water be a liquid and a gas at the same time?

a)

A

b)

B

c)

C

d)

D

e)

E

6.

Describe the substance at letter A.

a)

Solid

b)

Liquid

c)

Melting

d)

Evaporating

7.

How many states of matter are present during line segment BC?

a)

One

b)

Two

c)

Three

d)

Depends on the temperature

8.

At which letter is the substance changing its state of matter?

a)

A only

b)

A, C, and E

c)

D and E

d)

B and D

9.

NaCl was heated starting at an initial temperature of 0°C. The heating curve is shown in the picture. What is the melting point of this substance?

a)

0°C

b)

801°C

c)

1000°C

d)

1465°C

10.

Describe the substance at letters D.

a)

Gas

b)

Liquid

c)

Melting

d)

Evaporating

11.

Describe the substance at letters D.

a)

Gas

b)

Liquid

c)

Melting

d)

Evaporating

12.

At higher temperatures

a)

Particles in an object move slower

b)

Particles in an object move faster

c)

Particles move at the same speed as lower temperature

13.
In which region(s) does temperature remain constant?
a)
Region 1, 3, & 5
b)
Region 2 & 4
c)
Region 1 only
d)
Region 1 & 2
14.
In which region(s) does temperature increase?
a)
Region 1, 3, & 5
b)
Region 2 & 4
c)
Region 1 only
d)
Region 1 & 2
15.
In which region(s) of the graph would the substance only be in one phase?
a)
Region 1, 3, & 5
b)
Region 2 & 4
c)
Region 1 only
d)
Region 1 & 2
16.
Describe the substance between letters C and D. 
a)
Gas
b)
Liquid
c)
Melting
d)
Evaporating
17.

Thermal energy always moves:

a)

From a high temperature object to a lower temperature object.

b)

From a lower temperature object to a higher temperature object.

c)

From an object with lower kinetic energy to an object with higher kinetic energy.

d)

From an object of higher mass to an object of lower mass.

18.

What does heat do to intermolecular forces?

a)

strengthens them

b)

Weakens them

c)

reverses them

19.

This curve indicates what about the heat energy?

a)

Heat energy is being added or absorbed

b)

Heat energy is being released

20.

In which region(s) of the graph would the substance be a liquid and a gas at the same time?

a)

Region 1

b)

Region 2

c)

Region 3

d)

Region 4

e)

Region 5

21.

What is the freezing point of the substance?

a)

0oC

b)

60oC

c)

120oC

d)

180oC

22.
What line segment represents only the solid state?
a)
A-B
b)
B-C
c)
C-D
d)
D-E
23.
Which process takes the longest to occur?
a)
melting
b)
boiling
c)
freezing
d)
heating the solid
24.
What state(s) of matter are present at D-E?
a)
Solid-liquid
b)
Liquid
c)
Liquid-gas
d)
Gas-Solid
25.

This method separates dissolved substances based on differences in how well they dissolve in a solvent.

a)

Filtration

b)

Evaporation

c)

Distillation

d)

Chromatography

26.

This method separates dissolved substances based on differences in how well they dissolve in a solvent.

a)

Filtration

b)

Evaporation

c)

Distillation

d)

Chromatography

27.

This method requires the use of a condenser.

a)

Filtration

b)

Evaporation

c)

Distillation

d)

Chromatography

28.

Filtration can be used to separate the atoms in a compound.

a)

TRUE

b)

FALSE

29.

Substances in a mixture can be separated by physical methods.

a)

TRUE

b)

FALSE

30.

This method separates substances due to differences in the sizes of their particles.

a)

Filtration

b)

Evaporation

c)

Distillation

d)

Chromatography

31.

If a substance is insoluble in water, it ___________.

a)

dissolves in water

b)

cannot dissolve in water

c)

forms a solution when mixed with water

d)

cannot be separated from water

32.

Which method(s) separate substances based on them having different boiling points? (Select all that apply).

a)

Filtration

b)

Evaporation

c)

Distillation

d)

Chromatography

33.

Which method is this a picture of?

a)

Filtration

b)

Evaporation

c)

Distillation

d)

Chromatography

34.

Which method is this a picture of?

a)

Filtration

b)

Evaporation

c)

Distillation

d)

Chromatography

35.

Which method has a solid and a gas as the final products?

a)

Filtration

b)

Evaporation

c)

Distillation

d)

Chromatography

36.
Can you separate salt from water using filtration?
a)
yes
b)
no
37.
What is a substance that is dissolved in another substance? 
a)
solution
b)
solute
c)
solvent
d)
compound
38.
Jessica made a pitcher of lemonade. What can she do to dilute if she thinks it doesn't taste right?
a)
Add water
b)
Add sugar
c)
Boil the lemonade
d)
Put it in the refrigerator 
39.
Which one of the following solids is insoluble in water?
a)
sugar
b)
sand
c)
copper sulfate
d)
salt
40.
Liquids that do not mix may be separated by using..
a)
an evaporating dish
b)
a separating funnel
c)
a loading
d)
a sedimentation
41.
If a solid disappears when added to a liquid (like when sugar is stirred in water)... it is said to have...
a)
Formed a solute
b)
Dissolved
c)
Formed a solvent
d)
Become insoluble
42.

Filtering is

a)

Separating a soluble solid and solvent

b)

When one liquid is changed to another liquid

c)

Separating solids from liquids

d)

Separating an insoluble solid from a liquid

43.

The separation technique being used is

a)

Decanting

b)

Filtering

c)

Evaporation

d)

Distillation

44.
Which one of the following would you use to separate sand from iron filings?
a)
a bar magnet
b)
filter paper
c)
chromatography paper
d)
alum
45.
Which one of the following solids is insoluble in water?
a)
sugar
b)
sand
c)
copper sulfate
d)
salt
46.
Name the separation method that causes wet clothes on a clothes line to dry
a)
Chromatography
b)
Filtration
c)
Distillation
d)
Evaporation
47.
Jessica made a pitcher of lemonade. What can she do to dilute if she thinks it doesn't taste right?
a)
Add water
b)
Add sugar
c)
Boil the lemonade
d)
Put it in the refrigerator 
48.
In filtration, the liquid part collected is called the filtrate and the solid bit that remained on the filter paper is called the residue.
In filtration, what is the part that remains called?
a)
Solid
b)
Filtrate
c)
Remainder
d)
Residue
49.
Of these mixtures, which one is a solution?
a)
A
b)
B
c)
C
d)
D
50.
The clear liquid which passes through the filter paper is called
a)
filt
b)
filter
c)
filtrate
d)
filtration

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