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Pure Substance and Mixtures

Total questions: 42

Worksheet time: 32mins

Name
Class
Date
1.

Substances that are made up of ONLY one type of atom (element) or compound.

a)

Heterogeneous mixture

b)

Pure substance

c)

Suspension

d)

Homogeneous mixture

2.
Which of the following is a pure substance? 
a)
Water
b)
Sugar
c)

Gold

d)
ALL of them
3.

True or False: Elements and compounds are pure substances.

a)

True

b)

False

4.

What is the smallest unit of an element that maintains the properties of that element?

a)

Atom

b)

Compound

c)

Molecule

d)

Mixture

5.

What is a substance made up of one type of atom?

a)

Atom

b)

Compound

c)

Element

d)

Mixture

6.

A particle made up of two or more different types of atoms chemically combined.

a)

Atom

b)

Molecule

c)

Compound

d)

Mixture

7.

A variety of elements and compounds that are not chemically combined with each other.

a)

atom

b)

element

c)

compound

d)

mixture

8.

A sample of matter, either a single element or a single compound that has definite chemical and physical properties

a)

Atom

b)

Element

c)

Pure Substance

d)

Mixture

9.

A mixture that does not have a uniform structure or composition throughout

a)

heterogeneous mixture

b)

homogeneous mixture

10.

A mixture that has uniform structure or composition throughout

a)

Heterogeneous mixture

b)

Homogeneous Mixture

11.

Mixtures in which the particles of a material are spread throughout a liquid or gas but are too large to stay mixed without being stirred or shaken.

a)

Suspension

b)

Solution

c)

Colloid

12.

One substance is dissolved in another substance

a)

Mixture

b)

Suspension

c)

Solution

d)

Colloid

13.

A mixture where particles spread throughout a liquid or gas, but do not settle out quickly. Particles are small. Examples, jello and milk

a)

Suspension

b)

Solution

c)

Colloid

d)

Mixture

14.

A tool used to separate liquids from solids

a)

Scale

b)

Filter

c)

Graduated Cylinder

15.

a compound or substance that has been purified or prepared, especially artificially.

a)

Chemical

b)

Atom

16.

A value that tells if a substance is acidic, basic or neutral

a)

Degrees

b)

pH

c)

Organic

17.

It is a combination of two or more substances.

a)

Substances

b)

Mixtures

c)

Elements

d)

Compound

18.

It is a mixture with a non-uniform composition.

a)

Homogeneous mixture

b)

Solvation process

c)

Heterogeneous mixture

d)

Solubility

19.

In a solution this is the dissolving substance.

a)

Powder

b)

Solute

c)

Liquid

d)

Gas

20.

This is a mixture of two or more substances in which one or more of these substances (solutes) is dissolved in another substance.

a)

Compound

b)

Element

c)

Heterogeneous mixture

d)

Homogeneous mixture

21.

Why is water known as universal solvent?

a)

It is found anywhere.

b)

It gives life to living things.

c)

It covers the greater part of the earth.

d)

It dissolves almost all the substances on Earth.

22.

Is water a element or compound?

a)

Element

b)

Compound

23.

A compound consists of two or more elements chemically combined.

a)

True

b)

False

24.

It is a combination of two or more substances in

which the composition is uniform throughout the

mixture.

a)

Heterogeneous mixture

b)

Homogeneous mixture

c)

Solvation

d)

Solution

25.

What are two types of solutions?

a)

Saturated and Unsaturated

b)

Solubility and Solvation

c)

Solute and Solvent

d)

Unsaturated and Saturated

26.

The process of separating components

of a liquid through selective evaporation or

condensation

a)

Distillation

b)

Evaporation

c)

Filtration

d)

Chromatography

27.

A process of separating

components of a mixture.

a)

Distillation

b)

Evaporation

c)

Filtration

d)

Chromatography

28.

Elements

a)

are made of two or more types of atoms chemically bonded together

b)

are made of one type of atom

c)

are made of two or more types of molecules combined in the same space

d)

are always individual atoms

29.

Compounds

a)

are made of two or more types of atoms chemically bonded together

b)

are made of one type of atom

c)

are found on the periodic table

d)

can be separated into their individual parts through physical means

30.

Mixtures

a)

are made of two different types of atoms chemically bonded together

b)

Are only liquids

c)

Cannot be separated

d)

Can be separated using physical properties

31.

Pure Substances

a)

Are only made of one type of atom

b)

Have the same properties throughout

c)

Can never be broken down into something simpler

d)

Are only made of molecules

32.

When substances combine chemically...

a)

they form a mixture and their properties change

b)

they form a compound and their properties change

c)

they form a mixture where their properties stay the same

d)

the form a compound where their properties stay the same

33.

This method is a technique used in separating a less-dense substance from a denser one.

a)

decantation

b)

evaporation

c)

distillation

d)

filtration

34.

This technique is based on the differences of the boiling point of the substance in the mixture.

a)

decantation

b)

distillation

c)

filtration

d)

chromatography

35.

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

a)

chromatography

b)

distillation

c)

sieving

d)

physical manipulation

36.

This method is used to separate metals from non metals.

a)

use of magnet

b)

physical manipulation

c)

sieving

d)

chromatography

37.

This method is useful in a pharmaceutical industry in determining the amount of each chemical in each product.

a)

distillation

b)

chromatography

c)

sieving

d)

decantation

38.

This method is used in separating soluble solid from a liquid such as salt from water.

a)

evaporation

b)

distillation

c)

decantation

d)

filtration

39.
What is the process of separating products with densities?
a)
centrifugation
b)
chromatography
c)
heating
d)
decantation
40.

What method of separation would work best to separate water and rubber pellets?

a)

filtration

b)

sifting

c)

evaporation

d)

magnetic attraction

41.

Which of of these mixtures could be separated by filtration?

a)

sugar and milk

b)

sand and water

c)

milk and water

d)

sugar and water

42.

You want to see what colors are all present in a solution. What method would you use?

a)

chromatography

b)

flotation

c)

mangetism

d)

sifting

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