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compounds and mixture

Total questions: 112

Worksheet time: 1hrs 10mins

Name
Class
Date
1.
Classify the picture with the correct label.
a)
Element
b)
Compound
c)
Mixture of Elements
d)
Mixture of Compounds
2.
Classify the picture with the correct label.
a)
Compounds
b)
Mixture of Elements
c)
Mixture of Compounds
d)
Mixture of Elements & Compounds
3.
Classify the picture with the correct label.
a)
Element
b)
Compound
c)
Mixture of Compounds
d)
Mixture of Elements
4.
Classify the picture with the correct label.
a)
Element
b)
Compound
c)
Mixture of Elements & Compounds
d)
Mixture of Elements
5.
Classify the picture with the correct label.
a)
Mixture of Elements
b)
Mixture of Elements & Compounds
c)
Mixture of Compounds
d)
Compounds
6.
which one only has one type of atom In it.
a)
Element
b)
compound
7.
Compounds are chemically bonded together 
a)
False
b)
True
c)
I don't know?
8.
Salt dissolves in water like ----
a)
Pepper dissolves in water
b)
Sugar dissolves in water
c)
Rocks dissolve in water
d)
Seeds dissolve in water
9.
To dissolve in water.
a)
solubility
b)
density
c)
mixture
d)
evaporation
10.

True or False: Each part of a mixture keeps its properties when mixed.

a)

True

b)

False

11.

True or False: Mixtures can be separated by physical processes.

a)

True

b)

False

12.

In which mixture can you see all of the parts?

a)

homogeneous

b)

heterogeneous

13.

In which mixture can you not see all of the parts?

a)

homogeneous

b)

heterogeneous

14.
What is a mixture?
a)
elements chemically combined
b)
a combination of different things
c)
it is found on the Periodic Table 
d)
it is made of chemical
15.
Sand floating in water, but most of the sand is settled at the bottom this an example of which type of mixture?
a)
A solution
b)
A colloid
c)
A suspension
d)
A compound
16.
A solution that is considered dilute would be....
a)
Dark in color
b)
Have a strong scent
c)
Have a large amount of solute
d)
Have a small amount of solute
17.
The air around was is  a mixture of gases.
a)
True
b)
False
18.

What is a mixture in which all the parts are EVENLY mixed?

a)

energy

b)

beaker

c)

solution

d)

salad

19.

Which of the following is a solution?

a)

geletin with blueberries

b)

granola

c)

juice

d)

salad

20.

Which of the following is a solution?

a)

lemonade

b)

trail mix

c)

legos

d)

iron filings and sand

21.

A salad is an example of a __________.

a)

homogenous mixture

b)

solution

c)

heterogeneous mixture

d)

homogenous solution

22.
What are the two types of Mixtures
a)
Elements and Subatomic Particles
b)
Protons and Electrons
c)
Atoms and Compounds
d)
Homogenous and Heterogeneous
23.
Coloured water is an example of a
a)
homogeneous mixture
b)
heterogeneous mixture
24.

What is known as the "universal solvent?"

a)

water

b)

acid

c)

sugar

d)

salt

25.

What is the definition of a solvent?

a)

The substance that is dissolved.

b)

The substance in which the solute is dissolved.

c)

Unable to be dissolved.

26.

A combination of two or more substances.

a)

mixtures

b)

separate

c)

solid

d)

whisk

27.

What is aluminum (Al)?

a)

Element

b)

Compound

c)

Mixture

28.

What is water (H2O)?

a)

Element

b)

Compound

c)

Mixture

29.

What is table salt (NaCl)?

a)

Element

b)

Compound

c)

Mixture

30.

What is soda?

a)

Element

b)

Compound

c)

Mixture

31.

What is salt water?

a)

Element

b)

Compound

c)

Mixture

32.

What is salad dressing?

a)

Element

b)

Compound

c)

Mixture

33.

What is sodium bicarbonate (NaHCO₃)?

a)

Element

b)

Compound

c)

Mixture

34.

What is iron?

a)

Element

b)

Mixture

c)

Compound

35.

What is air?

a)

Element

b)

Compound

c)

Mixture

36.
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
37.
Which of the following pairs of substances may best be separated through distillation
a)
 sand and soil
b)
water and soil
c)
salt and sand
d)
 water and alcohol
38.

Name the method of separation

a)

Fractional distillation

b)

Chromatography

c)

Condensation

d)

Evaporation

39.
A separation technique which uses a fractionating column to separate different liquid components in a mixture with different boiling points by heating mixture is called
a)
Fractional distillation
b)
filtration
c)
crystallization
d)
evaporation
40.
Separating mixtures based on boiling points.
a)
Desalination
b)
Distillation
c)
Decantation
d)
Condensation
41.
Distillation uses two changes of state. what are they?
a)
Evaporation and condensation
b)
Evaporation and freezing
c)
melting and boiling
d)
sublimation and condensation
42.

This diagram represents...

a)

An element

b)

A molecule

c)

A compound

d)

A mixture of elements and compounds

43.
a)
element
b)
compound
c)
mixture of elements
d)
mixture of compounds
44.
a)
element
b)
compound
c)
mixture of elements
d)
mixture of compounds
45.
a)
element
b)
compound
c)
mixture of elements
d)
mixture of compounds and elements
46.
a)
element
b)
compound
c)
mixture of elements and compounds
d)
mixture of compounds
47.
a)
element
b)
compound
c)
mixture of elements
d)
mixture of compounds
48.

What process is used to separate crude oil in hydrocarbons with different chain lengths?

a)

distillation

b)

fractional distillation

c)

cracking

d)

polymerisation

49.

Fractional distillation separates crude oil based on the different __________ of the molecules in the mixture

a)

melting point

b)

boiling point

c)

freezing point

d)

chemical reactivity

50.
Water and alcohol are easily separated by distillation because of their
a)
different densities
b)
different boiling points
c)
different colours
d)
different melting points
51.

Which of the following pairs of substances may best be separated through through fractional distillation

a)

sand and soil

b)

water and soil

c)

salt and sand

d)

water and alcohol

52.

Label part 1

a)

Thermometer

b)

Fractionating column

c)

condenser

53.

Label 2

a)

Thermometer

b)

Fractionating column

c)

condenser

54.

Label 5

a)

Water in

b)

water out

c)

condenser

d)

fractionating column

55.

Label 3

a)

Beaker

b)

Conical Flask

c)

Boiling tube

d)

rounded bottom flask

56.

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

a)

distillation

b)

filtration

c)

chromatography

d)

sedimentation

57.
chromatography separates the mixture of dyes on the basis of their ----------------------------
a)
density
b)
solubility
c)
gravity
d)
boiling point
58.
On the chromatogram given -------------- is mixture.
a)
red
b)
orange
c)
green
d)
black
59.

A pure substance shows ------------------ spot on chromatogram

a)

0

b)

1

c)

2

d)

3

60.

A substance is soluble if it can be dissolved.


In paper chromatography, the most soluble solute _____________________ .

a)

does not move from the start point

b)

stays closest to the start point

c)

travels furthest away from the start point

d)

can be found in the middle of the chromatogram

61.

What is the correct image of paper chromatography???

a)
b)
c)
62.
Which plant species has plant pigments most similar to those in A?
a)
B
b)
C
c)
D
63.

What is chromatography?

a)

A way to see pretty colors

b)

A laboratory technique used to separate a mixture.

c)

A form of distillation

64.

Two or more substances that are mixed together but not chemically combined create a...

a)

solvent

b)

compound

c)

mixture

65.

Which of the following mixture/s is/are separated by chromatography?

a)

Pigments from natural colours

b)

Colours in a dye

c)

Colours of flowers extracts

d)

All the above

66.
Why must the base line be drawn in pencil and not pen?
a)
a) Pencil is good at keeping substances in place.
b)
b) Pencil is soluble in water
c)
c) Pencil is insoluble in water
d)
d) Pencil is not coloured
67.

In paper chromatography, the LEAST soluble solute ____.

a)

does not move from the start point

b)

stays closest to the start point

c)

travels furthest away from the start point

d)

can be found in the middle of the chromatogram

68.
In chromatography, if a solute does not separate and remains on the start line ....
a)
the solute is insoluble in the solvent
b)
the solute is soluble in the solvent
c)
the solvent is insoluble in the solute
d)
the solvent is soluble in the solute
69.
a)

Blue loves water.

b)

Yellow loves water.

c)

Green loves water.

70.

Which of the following techniques separates various coloured components of black-coloured ink?

a)

Centrifugation

b)

Chromatography

c)

Evaporation

d)

Distillation

71.

Which of the following mixture/s is/are separated by chromatography?

a)

Pigments from natural colours

b)

Colours in a dye

c)

Colours of flowers extracts

d)

All the above

72.

Which of the following is correct about chromatography?

a)

It separates those solutes that dissolve in the same solvent.

b)

It separates those solutes that dissolve in different solvents.

c)

It separates a solute that dissolves in a solid solvent.

d)

It separates gaseous solutes from liquid solvents.

73.

Black dye separates into:

a)

Yellow, red and green colour

b)

Blue, red and yellow colour

c)

Yellow and green colour

d)

Red and yellow colour

74.

Which of the following statements is correct?

a)

The most soluble component remains near the bottom.

b)

The most soluble component rises to the top.

c)

The least soluble component remains near the bottom.

d)

Both b and c

75.

Which is the least soluble component in the case of green ink?

a)

Blue

b)

Yellow

c)

Red

d)

Pink

76.

This is a type of mixture where one substance dissolves into another

a)

Solution

b)

Miscibility

c)

Compound

d)

Solubility

77.

The substance that does the dissolving

a)

Solute

b)

Solvent

c)

Solution

d)

Miscibility

78.
Which substance is SOLUBLE in water?
a)
sand
b)
oil
c)
salt (sodium chloride)
d)
sulfur
79.
Which substance is INSOLUBLE in water?
a)
salt (sodium chloride)
b)
sugar (sucrose)
c)
oil
d)
copper sulfate
80.
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.
81.
Solutions are composed of __________ .
a)
salts and solutes
b)
solvents and salts
c)
solutes and alloys
d)
solutes and solvents
82.
In a sample of salt water, NaCl would be considered the ______.
a)
Solution
b)
Solute
c)
Solvent
d)
Solvation
83.

Identify the solute Lemonade - it contains Water, lemon juice, and sugar

a)

water

b)

lemon juice

c)

sugar and lemon juice

84.
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
85.

In a sample of seawater, the solvent is:

a)

water

b)

sea

c)

salt

d)

air

86.

Solutes that dissolve in water can be solids, liquids or gases

a)

true

b)

false

87.

A common gas that we find dissolved in seawater is

a)

krypton

b)

neon

c)

oxygen

d)

carbon tetrachloride

88.

If we heat a sample of water, then the amount of oxygen dissolved will increase

a)

true

b)

false

89.

A common gas that we find dissolved in coca cola is

a)

krypton

b)

neon

c)

oxygen

d)

carbon dioxide

90.

If I want more sugar to dissolve in water, I should stir the water

a)

true

b)

false

91.
Which is an example of a solute?
a)
Egg whites
b)
Sugar
c)
Water
d)
Acetone
92.

What is a solvent

a)

A liquid that will dissolve a solid solute

b)

Another word for solution

c)

A thing that make drinks change colour

d)

Usually the solid about to be dissolved

93.

The substance being dissolved in a solution is the?

a)

solution

b)

solute

c)

solvent

d)

mixture

94.

The substance in which a solute is dissolved is a?

a)

solution

b)

solvent

c)

alloy

d)

mixture

95.
Solutions are composed of __________ .
a)
salts and solutes
b)
solvents and salts
c)
solutes and alloys
d)
solutes and solvents
96.

If I dissolve carbon dioxide in water, what is the solvent?

a)

Carbon Dioxide

b)

There is no solvent

c)

Oxygen

d)

Water

97.

If I dissolve salt in water, what is the solvent?

a)

salt

b)

water

c)

salt & water

d)

none of the above

98.

Define the term insoluble.

a)

Can dissolve in water.

b)

Cannot dissolve in water.

c)

Partially dissolves in water.

99.

Is water the only solvent that can dissolve solutes?

a)

Yes

b)

No

100.

The solubility of aluminium fluoride at 60 deg Celsius is 1.1 grams in 100 mL of water. What does this mean?

a)

The solution is saturated when 1.1 grams is put in 100 mL

b)

1.2 grams can still be dissolved in 100 mL of water

c)

0.1 grams will not dissolved anymore in 100 mL of water

d)

The solution is dilute if 1.3 grams is put in 100 mL of water

101.

The solubility of aluminium chloride at 80 deg Celsius is 48.6 grams in 100 mL of water. Which of the following statements is TRUE?

a)

47 grams cannot be dissolved at 85 deg Celsius.

b)

49 grams can be completely dissolved at that temperature

c)

48.5 grams can be dissolved at that temperature

d)

50 grams can be dissolved at 79 degree Celsius

102.

Which of the following temperatures can dissolved more salt?

a)

35 deg C

b)

46 deg C

c)

43 deg C

d)

38 deg C

103.

Sodium chloride has a solubility of 36 g/100 g of water and for calcium chloride, it is 74 g/100 g of water at 20 deg C. Which of the following is NOT correct?

a)

both become saturated at that temperature

b)

calcium chloride has higher solubility

c)

sodium chloride dissolves faster than calcium chloride

d)

38 grams more of calcium chloride can be dissolved at the same temperature

104.

The solubility of copper sulfate at 20 deg C is 32 g/100 g of water. What is its solubility at 10 deg C?

a)

64 g

b)

32 g

c)

16 g

d)

128 g

105.

The variable that you change in an investigation is _____.

a)

independent

b)

dependent

c)

control

d)

super dependent

106.

The variable that you measure in an investigation is _____.

a)

dependent

b)

independent

c)

control

d)

super control

107.

The variable that is kept the same in an investigation is ____.

a)

control

b)

dependent

c)

independent

d)

super dependent

108.

Which of the following could be a variable?

a)

mass of a rock

b)

volume of ocean water

c)

time of diffusion

d)

all of these

109.

A group of students set the temperature of water in an investigation from 10 deg C to 50 deg C. What is the range?

a)

50

b)

40

c)

60

d)

45

110.

In an investigation, students studied the effect of volume of water on the amount of salt dissolved in it. Which of the following must be the control variable/s?

a)

volume of water

b)

temperature of water

c)

mass of salt

d)

both mass and temperature

111.

Which of the following could be used to present the results of an investigation?

a)

bar graph

b)

line graph

c)

tables

d)

all of these

112.

Use this graph to estimate the solubility of KCl at 70 deg Celsius.

a)

about 48 g

b)

about 42 g

c)

about 40 g

d)

50 g