SEPARATNG HETEROGENEOUS MIXTURE

Question 1

can be done to separate the components of a heterogeneous mixture with big, visible components.

Answer 1

Manual picking

Question 2

is a method used by farmers to separate husks from rice grains.
Here the mixture is placed in a flat pan or bilao and tossed in the air. The
rice grains fall on the pan as the husks are blown by the wind.

Answer 2

Winnowing

Question 3

is done by passing through a layer of holes, called a sieve. This separates the components by size.

Answer 3

Sieving

Question 4

Some heterogeneous mixtures can be separated by using a _____________. This is
applied in separating metals, such as iron filings, from nonmetallic objects.

Answer 4

MAGNETS

Question 5

is a process of separating the solid from

Answer 5

Filtration

Question 6

The solid collected in the filter paper is called ________________

Answer 6

residue

Question 7

The liquid that passed through the filter paper is called ____________

Answer 7

filtrate

Question 8

is a process by which suspended solids separate due to gravity.

Answer 8

Sedimentation

Question 9

is a process by which the liquid is gently poured out, leaving the solids that settle at the bottom of the container.

Answer 9

Decantation

Question 10

Decantation for liquid-liquid mixtures may be done using a _______________

Answer 10

separatory funnel.

Question 11

can be used to separate suspensions by rotating the mixture at very high speeds, pushing the solids to the bottom of the
container.

Answer 11

CENTRIFUGATION

Question 12

choose your answer below

MANUAL PICKING

a. using a high-speed rotating machine to separate components

b. separation by tilting the container and removing the liquid on top

c. separating metals from other materials

d. separating solid mixtures with different sizes

e. separating grains from husks

f. separating components using the hands or tongs

g. separating the liquid and the solid by passing the mixture

Answer 12

f. separating components using the hands or tongs

Question 13

choose your answer below

WINNOWING

a. using a high-speed rotating machine to separate components

b. separation by tilting the container and removing the liquid on top

c. separating metals from other materials

d. separating solid mixtures with different sizes

e. separating grains from husks

f. separating components using the hands or tongs

g. separating the liquid and the solid by passing the mixture

Answer 13

e. separating grains from husks

Question 14

choose your answer below

FILTRATION

a. using a high-speed rotating machine to separate components

b. separation by tilting the container and removing the liquid on top

c. separating metals from other materials

d. separating solid mixtures with different sizes

e. separating grains from husks

f. separating components using the hands or tongs

g. separating the liquid and the solid by passing the mixture

Answer 14

g. separating the liquid and the solid by passing the mixture

Question 15

choose your answer below

DECANTATION

a. using a high-speed rotating machine to separate components

b. separation by tilting the container and removing the liquid on top

c. separating metals from other materials

d. separating solid mixtures with different sizes

e. separating grains from husks

f. separating components using the hands or tongs

g. separating the liquid and the solid by passing the mixture

Answer 15

b. separation by tilting the container and removing the liquid on top

Question 16

choose your answer below

SIEVING

a. using a high-speed rotating machine to separate components

b. separation by tilting the container and removing the liquid on top

c. separating metals from other materials

d. separating solid mixtures with different sizes

e. separating grains from husks

f. separating components using the hands or tongs

g. separating the liquid and the solid by passing the mixture

Answer 16

d. separating solid mixtures with different sizes

Question 17

choose your answer below

USE OF MAGNET

a. using a high-speed rotating machine to separate components

b. separation by tilting the container and removing the liquid on top

c. separating metals from other materials

d. separating solid mixtures with different sizes

e. separating grains from husks

f. separating components using the hands or tongs

g. separating the liquid and the solid by passing the mixture

Answer 17

c. separating metals from other materials

Question 18

choose your answer below

CENTRIFUGATION

a. using a high-speed rotating machine to separate components

b. separation by tilting the container and removing the liquid on top

c. separating metals from other materials

d. separating solid mixtures with different sizes

e. separating grains from husks

f. separating components using the hands or tongs

g. separating the liquid and the solid by passing the mixture

Answer 18

a. using a high-speed rotating machine to separate components

Question 19

Write yes if the separating technique is appropriate for the given mixture. If not,
identify what separation technique is applicable to separate the components of
the mixture.

colored clothes from white clothes = winnowing

Answer 19

manual picking

Question 20

Write yes if the separating technique is appropriate for the given mixture. If not,
identify what separation technique is applicable to separate the components of
the mixture.

chalk and water = filtration

Answer 20

YES

Question 21

Write yes if the separating technique is appropriate for the given mixture. If not,
identify what separation technique is applicable to separate the components of
the mixture.

staple wires and sand = using a sieve

Answer 21

magnet

Question 22

Write yes if the separating technique is appropriate for the given mixture. If not,
identify what separation technique is applicable to separate the components of
the mixture.

rock salt and cornstarch = winnowing

Answer 22

sieving

Question 23

Write yes if the separating technique is appropriate for the given mixture. If not,
identify what separation technique is applicable to separate the components of
the mixture.

rice grains and water = sedimentation and decantation

Answer 23

filtration

Question 24

Write yes if the separating technique is appropriate for the given mixture. If not,
identify what separation technique is applicable to separate the components of
the mixture.

urine components = centrifugation

Answer 24

YES

Question 25

Write yes if the separating technique is appropriate for the given mixture. If not,
identify what separation technique is applicable to separate the components of
the mixture.

boiled noodles in water = filtration

Answer 25

YES

Question 26

Write yes if the separating technique is appropriate for the given mixture. If not,
identify what separation technique is applicable to separate the components of
the mixture.

sand and gravel = decantation

Answer 26

sieving

Question 27

Write yes if the separating technique is appropriate for the given mixture. If not,
identify what separation technique is applicable to separate the components of
the mixture.

baby oil and water = evaporation

Answer 27

decantation

Question 28

Write yes if the separating technique is appropriate for the given mixture. If not,
identify what separation technique is applicable to separate the components of
the mixture.

pineapple chunks from pizza = manual picking

Answer 28

YES

Question 29

Name some of the techniques used in the following industrial processes.

manufacturing artificial food colorants safe for consumption

Answer 29

recrystallization,
filtration

Question 30

Name some of the techniques used in the following industrial processes.

counting blood cells in medical tests

Answer 30

centrifugation

Question 31

Name some of the techniques used in the following industrial processes.

separating different components of cells

Answer 31

centrifugation

Question 32

Name some of the techniques used in the following industrial processes.

removing metals from recyclables

Answer 32

use of magnet

Question 33

______1. Which is not a method for separating solid-liquid heterogeneous mixtures?

a. evaporation
b. using a sieving tool
c. filtration
d. decantation

Answer 33

Answer: a. evaporation. As two visible phases are present, there is no need to boil off the solvent. The last three choices may be used instead.

Question 34

______2. Which cannot be separated by manual picking?

a. oatmeal with fruit slices
b. cereal mix
c. oil in water
d. mixed vegetables

Answer 34

Answer: c. oil in water. Oil and water can be separated easier by decantation using a
separatory funnel. The rest can be manually separated due to the big, visible components.

Question 35

______3. What can be used to separate metals and plastics in the garbage?

a. magnet
b. filter paper
c. sieve
d. pan

Answer 35

Answer: a. magnet. Taking advantage of the physical properties of each component is a key
tool in separation. Magnets will attract the metals but not the plastics.

Question 36

______4. Which separation technique takes advantage of the different particle sizes in
solids?
a. using a sieving tool
b. filtration
c. winnowing
d. decantation

Answer 36

Answer: a. using a sieving tool. Sieving takes into account the difference in the particle size of the solids in a solid-solid mixture. This is used in separating gravel and sand in preparing cement.

Question 37

______5. What do you call a layer of holes that allows specific sizes of particles to pass?

a. separatory funnel
b. pan
c. sieve
d. magnet

Answer 37

Answer: c. sieve. A sieve is used to separate solids with different sizes. It is haracterized by the size of the holes.

Question 38

______6. Which is a method for separating a solid-liquid heterogeneous mixture by passing
through a particular material?
a. decantation
b. centrifugation
c. filtration
d. winnowing

Answer 38

Answer: c. filtration. The first three choices are for separating solid-liquid heterogeneous mixtures. The first one makes use of a filtering material.

Question 39

______7. Which refers to the process by which suspended particles eventually separate into
layers by gravity?
a. decantation
b. filtration
c. sedimentation
d. chromatography

Answer 39

Answer: c. sedimentation. Sedimentation is a process by which heavier and denser
components settle at the bottom of the container. This is true for sand in water when allowed to rest.

Question 40

______8. Which should be used for the easier decantation of oil and water?

a. separatory funnel
b. beaker
c. flask
d. stirring rod

Answer 40

Answer: a. separatory funnel. A separatory funnel is a specialized glassware for the
decantation of two immiscible liquids. It has a stopcock to control the flow of the liquid.

Question 41

______9. Which of these techniques makes use of centrifugal force?

a. centrifugation
b. decantation
c. filtration
d. sedimentation

Answer 41

Answer: a. centrifugation. A centrifuge spins the mixture such that the dense materials are pushed to the bottom of the container. It is the centrifugal force that pushes down the dense materials.

Question 42

______10. Which is a separation technique wherein gentle pouring is involved?

a. filtration
b. chromatography
c. evaporation
d. decantation

Answer 42

Answer: d. decantation. Decantation is done after sedimentation. It is the removal of the liquid component by slow and gentle pouring.