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Separation of Substances

Total questions: 101

Worksheet time: 1hrs 5mins

Name
Class
Date
1.

In nature a large number of substances are found (a)   with other substances.

2.

In order to be useful, these substances must be (a)   from each other.

3.

3. Solids can be separated from each other by

a. ___________________,

b. ___________________,

c. ___________________, and

d. ___________________,

(a)  

4.

When components of a mixture are separated by hand, it is known as (a)   .

5.

Onions and tomatoes in a salad can be separated by

a)

Hand picking method

b)

Threshing method

c)

Churning

d)

Distillation method

6.

Handpicking method depends on the ____________ of substances

a)

Mass & Shape

b)

Size & Shape

c)

Purity & Size

d)

State & Heat

7.

Handpicking method is preferred in ____________ mixture

a)

Solid-Solid

b)

Solid-Liquid

c)

Liquid-Gas

d)

Solid-Gas

8.

Hand picking is done where the number of substances to be separated out is __________

a)

More

b)

Less

c)

Does not depend

d)

Extremely More

9.

Which among the following can be separated by Handpicking Method?

a)

Sand from Soil mixed in a container

b)

Black stone from Dark brown stone mixed in a bag

c)

Chalk powder from Salt

d)

Black grapes from Green Grapes

10.

Beating of any mixture to separate substances is called as

a)

Beating Method

b)

Threshing Method

c)

Thrushing Method

d)

Thrusting Method

11.

The substance in the mixture to be separated out should be

a)

Tightly bounded with mixture

b)

Loosely bounded with mixture

c)

having high density

d)

None of these

12.

Grains can be separated out from bundle of stalk by

a)

Handpicking

b)

Sieving

c)

Threshing

d)

Filtration

13.

In which of the following, does the threshing process can be applied

a)

Removing husk from grains

b)

Removing dust from broom

c)

Removing sand from water

d)

Removing oil from cloth

14.

What you understood by threshing?

a)

The process of removal of husk from grains

b)

The process of removal of husk from stalk

c)

The process of removal of grains from stalk

d)

The process of removal of grains from husk

15.

what is the method of separating components from a mixture by blowing?

a)

handpicking

b)

threshing

c)

winnowing

d)

washing

16.

Where is grain separated from?

a)

Stalks

b)

Wheat

c)

Rice

d)

Atta

17.

The density of the husk is

a)

less than grain

b)

more than grain

c)

equal to grain

d)

sometimes less, sometimes more

18.

Chaff separated out can be used as to

a)

Sow another crop

b)

Produce fertilizers

c)

burn and remove mosquitoes

d)

produce fodder for cattles

19.

The air blown will take the heavier grains

a)

away

b)

near

c)

very far

d)

none of these

20.

Sieving is a method of separating mixtures which is judged by the size and thickness of the particles of the components which make up the mixture.

a)

True

b)

False

21.

Sieving can be applied in mixtures having components of the same particle size.

a)

True

b)

False

22.

Sieving can separate the components of all kinds of mixtures.

a)

True

b)

False

23.

The number of particles to be separated must be taken into consideration when using the method of sieving

a)

True

b)

False

24.

Sieving is.....

a)

good for separating solids and liquids

b)

good for separating solid of different sizes

c)

good for separating a solid that is dissolved in a liquid

25.

Which property is used in the separation process of sieving?

a)

shape

b)

size

c)

solubility

26.

What is the purpose of sifting in a recipe?

a)

to filter out dirt and bugs

b)

to make the product rise higher during baking

c)

to break lumps and add air

27.

This involves using a strainer or a big screen to separate the components of solid mixtures.

a)

physical manipulation

b)

distillation

c)

sieving

28.

You've got a mixture of powdered sugar and cooking salt. What is the suitable separation technique for this mixture? Hint: the particles of cooking salt are much bigger than those of powdered sugar.

a)

filtering

b)

sieving

c)

separation technique

29.

You had these materials together but after performing a separation technique, you have these five groups. Which separation technique did you use?

a)

Distillation

b)

Decanting

c)

Sieving

30.

Which of the following mixture can be separated by sieving method?

a)

Sugar and ice

b)

Salt and fine spices

c)

Salt and sugar cubes

31.

Sand and few stone mixture can be separated by

a)

Sieving

b)

Handpicking

c)

Both sieving and handpicking

32.
Mixtures are always combinations of compounds that are in different states of matter. 
a)
TRUE
b)
FALSE
33.
All mixtures are defined as "heterogeneous." 
a)
TRUE
b)
FALSE
34.
Which of these is not a mixture? 
a)
oil and water
b)
sand and soda
c)
diet soda
d)
all are mixtures
35.
What are the two types of mixtures? 
a)
element and sub-atomic
b)
atoms and compounds
c)
homogeneous and heterogeneous
d)
element
36.
A glass of Kool Aid/ Tang juice can be classified as
a)
element
b)
homogeneous
c)
heterogeneous
d)
suspension
37.
How many classification of mixtures there are? 
a)
one
b)
two
c)
three
d)
four
38.
What is the similarities between Homogeneous & Heterogeneous Mixtures? 
a)
both are element
b)
both are compound
c)
both are mixtures
d)
both are solvent
39.
Is coffee a Homogeneous Mixture? 
a)
YES
b)
NO
40.
Soup is a Heterogeneous Mixtures?  
a)
TRUE
b)
FALSE
41.
It is a liquid mixture in which the minor component (the solute) is uniformly distributed with the major component (the solvent).
a)
solution
b)
element
c)
sub-atomic
d)
dissolution
42.
What do we call the process of dissolving?
a)
solution
b)
solute
c)
solvent
d)
dissolution
43.
A solution consists of two parts. One part is the substance that is dissolved. What is the name of this part of a solution?
a)
solute
b)
solvent
c)
dissolution
d)
mixture
44.
The other component of a solution is the part that does the dissolving. What is the name of this component?
a)
solvent
b)
dissolution
c)
element
d)
mixture
45.
When two liquids mix, they are said to be....
a)
soluble
b)
miscible
c)
solution
d)
dissolution
46.
When a substance can dissolve in another substance, it is said to be..
a)
soluble
b)
insoluble
c)
miscible
d)
solution
47.
True or false? Insoluble means that two substances can dissolve in one another.
a)
TRUE
b)
FALSE
48.
The most common solvent on Earth is...
a)
gasoline
b)
water
c)
turpentine
d)
soda
49.
Can sand be dissolve in water?
a)
YES
b)
NO
50.
All liquids can be mixed to create solutions.
a)
TRUE
b)
FALSE
51.

The process of separating the components of a liquid by agitating it vigorously is known as (a)  

52.

The process of settling down of particles of a solid in a liquid is

a)

Sublimation

b)

Sedimentation

c)

Filtration

d)

Decantation

53.

During _________________ the solid particles that settle down forming a layer are called sediments

a)

Decantation

b)

Condensation

c)

Evaporation

d)

sieving

e)

Sedimentation

54.

How do you separate sand from water ?

a)

Decantation

b)

Sedimentation

c)

Filtration

d)

Evaporation

55.

This is a picture of a ___________________ basin where sediments and particles settle to become sludge.

a)

sedimentation

b)

filtration

c)

chlorination

d)

absorption

56.

The process of letting dirty or polluted water sit so particles can settle to the bottom is called _______________________

a)

filtration

b)

absorption

c)

sedimentation

d)

precipitation

57.
The diagram shows the apparatus for separating soil and water. What are the labelled parts?
a)
A = distillate, B = filtrate
b)
A = filtrate, B = residue
c)
A = residue, B = filtrate
d)
A = residue, B = distillate
58.

Sawdust is not soluble in water. If, accidentally some particles of sawdust drop into a glass of water. How would you separate them from water?

a)

Decanting

b)

Filtering

c)

Sieving

d)

Distillation

59.
What is a mixture?
a)
A chemical combination of two or more different substances.
b)
A physical combination of two or more different substances.
c)
A chemically pure substance.
d)
A special type of solution
60.

What is the purpose of Filtration?

a)

Separating and insoluble solid from a liquid

b)

Separation of a mixture of 2 solids

c)

Separates heavier substances from a suspension

61.

Which one of the following techniques would best be used to separate soil and water?

a)

crystallization

b)

distillation

c)

Filtration

d)

Chromatography

62.

The process of separating small, insoluble solids from a liquid using a filter

a)

filtration

b)

evaporation

c)

sieving

d)

desalination

63.

The sand that is left on the filter paper is known as

a)

filtrate

b)

semi-permeable

c)

residue

d)

sieving

64.

What substance would be collected if you dry residue after filterng dirty water

a)

water

b)

salt

c)

nothing

d)

dirt

65.

Insoluble solids like sand and flour can be separated from water by

a)

decanting

b)

sieving

c)

filtration

d)

evaporation

66.
The diagram shows the apparatus for separating soil and water. What are the labelled parts?
a)
A = residue, B = distillate
b)
 A = residue, B = filtrate
c)
A = filtrate, B = residue
d)
A = distillate, B = filtrate
67.

If I pour salt and water through filter paper, what will happen?

a)

water and salt will go through the filter

b)

salt will get caught in the filter, water will pass through

c)

both salt and water will get caught in the filter

68.
3 states of water found on earth
a)
solid, liquid & gas
b)
oceans, lakes & streams
c)
evaporation, transpiration
d)
rain, sleet & hail
69.
Evaporation occurs when water changes into 
a)
transpiration
b)
snow
c)
solid
d)
vapor
70.

Evaporation is a process where _____________________

a)

liquid changes to gas

b)

throughout whole water

c)

on surface of water

d)

at any temperature

e)

at boiling point

71.

During evaporation, water molecules on the surface of water ___________________ from surroundings to move faster and then escapes into the air

a)

obtain energy

b)

lose energy

c)

share energy

d)

produce energy

72.

When we sweat, our sweat evaporates and cools our body because ___________________________

a)

part of the heat is removed from our body

b)

sweat removes heat energy from the skin

c)

air surrounding our body is colder

d)

air movement is faster

73.

Diagram above shows the change in the water level in a beaker after a few days. Which of the following explains the situation?

a)

Water diffuses quickly

b)

Water evaporates into the air

c)

Water turns to solid

d)

Water loses heat energy

74.

Factors that affect the rate of evaporation are :

a)

Humidity

b)

Air movement

c)

Exposed surface area

d)

Surrounding temperature

e)

Volume of water

75.

The higher humidity, the ________________________ the rate of evaporation of water

a)

lower

b)

higher

c)

no change

d)

changes

76.

The higher the surrounding temperature, the __________________ the rate of evaporation of water.

a)

lower

b)

higher

c)

same

d)

changes

77.

The larger exposed surface area of water, the _________________ rate of evaporation of water.

a)

slower

b)

faster

c)

changes

d)

same

78.

The faster the movement of air, the ____________the rate of evaporation of water.

a)

slower

b)

faster

c)

changes

d)

same

79.

Which of the following can dry the wet handkerchief faster?

a)

Hang it under the moving fan

b)

Hang it in a dark place

c)

Fold it into smaller size

d)

Hang it under the Sun

80.

The rate evaporation of water increases when the :

a)

surrounding temperature is decreases

b)

air movement is faster

c)

humidity is higher

d)

exposed surface area is larger

81.

The correct application of water evaporation is everyday life are :

a)

Using hair dryer to dry wet hair.

b)

Fold the cloth half when hanging to dry.

c)

Seafood like fish, squids and prawns are dried under the sun

d)

Close the fan while we sweating

82.
To clean spectacles, people often breathe out on the spectacles. This is an example of__________.  
a)
Condensation
b)
Evaporation
83.
Water drops seen in the cling foil which is covered on hot food. This is an example of__________.
a)
Evaporation
b)
Condensation
84.

Steam rising from wet clothes while ironing them. This is an example of__________.

a)

Evaporation

b)

Condensation

85.

Paint dries up after a while. This is an example of__________.

a)

Condensation

b)

Evaporation

86.
Dew drops seen in the leaves of some plants in the morning. This is an example of__________.
a)
Evaporation
b)
Condensation
87.

Water drops seen on the lid of a hot tea pot is an example of__________.

a)

Evaporation

b)

Condensation

c)

Precipitation

d)

Water cycle

88.
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.
89.
The substance being dissolved in a solution.
a)
sands
b)
solute
c)
solvent
d)
alloy
90.
The substance in which a solute is dissolved
a)
sands
b)
solvent
c)
alloy
d)
negative particles
91.
Solutions are composed of __________ .
a)
salts and solutes
b)
solvents and salts
c)
solutes and alloys
d)
solutes and solvents
92.
In a sample of salt water, NaCl would be considered the ______.
a)
Solution
b)
Solute
c)
Solvent
d)
Solvation
93.
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
94.
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
95.
Lemonade - Water, lemon juice, and sugar
Identify the solute
a)
water
b)
lemon juice
c)
sugar and lemon juice 
96.
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
97.

You are given a small beaker of solution at room temp. You add a bit of solute to the solution and it dissolves. The solution was:

a)

saturated

b)

unsaturated

c)

concentrated

d)

warm

98.
__________ are made up of solutes and solvents.
a)
Solutions
b)
Suspension
c)
Colloid
d)
mixtures
99.
When a solution is saturated:
a)
No additional material will dissolve in it
b)
You need to stir it more 
c)
Two materials have combined to create a clear liquid
d)
Crystals form 
100.

How do you know when you have a saturated solution?

a)

You don't see anymore material in the solution. It has dissolved.

b)

The material dissolves and no more will dissolve because you see it collect at the bottom.

c)

The solution is bubbling and cloudy.

d)

The solution is clear and there is nothing at the bottom.

101.

To separate a solution, you can ________________ it.

a)

filter

b)

evaporate

c)

solute

d)

saturate

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