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Practice Questions for BJU Chem 1 and 2 Assessment

Total questions: 55

Worksheet time: 49mins

Name
Class
Date
1.

The first postulate of the KMT is that all matter is made up of

a)

tiny particles

b)

molecules

c)

cells

d)

mass

2.

According the KMT, the particles are in

a)

different states

b)

organized patterns

c)

constant motion

d)

various containers

3.

According to the KMT, increasing the temperature of particles will

a)

give off energy

b)

increase motion

c)

decrease volume

d)

increase pressure

4.

According to the KMT, the particles of the different states of matter differ in what two key aspects?

a)

volume and mass

b)

density and extention of interactions

c)

temperature and freedom of motion

d)

freedom of motion and extent of interactions

5.

In a solid, what keeps each particle trapped in the same small volume and with the same surrounding particles.

a)

strong attractions between particles

b)

ionic bonds

c)

lack of particle motion

d)

low temperatures

6.

What does increasing the temperature of a solid lead to?

a)

increased mass of particles

b)

decreased space between particles

c)

decreased velocity of particles

d)

increased velocity of particles

7.

How does the particles in a liquid behave?

a)

Neatly organized without any movement.

b)

Move around trapped in a small volume and with the same surrounding particles.

c)

Move fast enough to break attractions and pushing other particles out of the way.

d)

Move freely in a straight line until they collide with another particle.

8.

How doe the particles in a gas behave?

a)

Neatly organized without any movement.

b)

Move around trapped in a small volume and with the same surrounding particles.

c)

Move fast enough to break attractions and pushing other particles out of the way.

d)

Move freely in a straight line until they collide with another particle.

9.

If the particles in a liquid are moving fast enough to complete break the attraction pulling it back towards other particles, what process is occuring?

a)

sublimation

b)

melting

c)

freezing

d)

evaporation

10.

When particles in a gas collide, they change

a)

direction and velocity

b)

velocity and temperature

c)

direction and volume

d)

volume and temperature

11.

In which state of matter are the particles the farthest apart?

a)

gas

b)

liquid

c)

solid

12.

Identify what is happening in the picture below as a chemical or physical change.

a)

Chemical

b)

Physical

c)

Both

13.

When iron is exposed to water vapor and air, it rusts. This ia an example of a _______________ change

a)

Chemical

b)

Physical

c)

Both

14.

Sugar is soluble (dissolves) in tea.

a)

physical change

b)

chemical change

15.

Safety goggles should only be used when working with

a)

an open flame

b)

chemicals

c)

using a mechanical device

d)

all the answers are correct

16.

If you are using a chemical that is corrosive, you should not...

a)

store it near flame

b)

follow the instructions

c)

let it touch your skin

d)

wear goggles

17.

______ chemicals eat away at solids

a)

flammable

b)

hungry

c)

biohazard

d)

corrosive

18.

As matter changes state from liquid to solid, the atoms move ______ .

a)

CLOSER together

b)

FARTHER apart

c)

stay the SAME

19.

  1. Which states that atoms and molecules are perpetually in motion?

a)

  1. The Kinetic Molecular Theory

b)

  1. Newton’s First Law

c)

  1. Law of Conservation of Matter

d)

  1. The Atomic Theory

20.

A concrete road has to built with expansion joints built in or it will buckle in extreme heat. Use KMT to explain why the concrete expands when heated.

a)

The concrete molecules expand when heated.

b)

The concrete molecules vibrate faster, needing more room.

c)

The water in the concrete gets hotter and becomes steam

d)

The concrete molecules slow down and need more space to rest.

21.

If the inside of a balloon is heated, the volume will?

a)

increase

b)

descrease

c)

increase a little, then decrease

d)

none of the above

22.

Gas pressure is caused by ______.

a)

gravity.

b)

gas molecules colliding with each other.

c)

gas molecules colliding with surfaces of the container.

d)

gas molecules reacting with each other.

23.

An inflated balloon is placed in liquid Nitrogen and shrinks until it looks empty. Which statement describes the movement of the gas particles in the balloon?

a)
The particles move more slowly and become closer together.
b)
The particles move more slowly and become further apart.
c)
The particles move faster and become closer together.
d)
The particles move faster and become further apart. 
24.

Gas pressure is caused by ______.

a)

gravity.

b)

gas molecules colliding with each other.

c)

gas molecules colliding with surfaces of the container.

d)

gas molecules reacting with each other.

25.

Define kinetic energy

a)

energy of motion

b)

static energy

c)

stored energy

d)

energy use

26.

Which of the following is an example of a physical change?

a)

Burning wood

b)

Rusting iron

c)

Melting ice

d)

Cooking an egg

27.

What is the main factor that determines the state of matter of a substance?

a)

Color

b)

Temperature

c)

Shape

d)

Weight

28.

The type of separation that would be appropriate if you needed to separate solid particles from a liquid is....

a)

Distillation

b)

Filtration

c)

Separation funnel

d)

Crystallization

29.

Which are methods of separating dissolved particles from the liquid they are dissolved in?

a)

Filtration, separation funnel, crystallization

b)

Filtration, distillation, crystallization

c)

Evaporation, filtration, crystallization

d)

Evaporation, distillation, crystallization

30.

Which separation method is used extremely significantly in recycling plants?

a)

Magnetic

b)

Filtration

c)

Distillation

d)

Crystallization

31.

What separation method is used to separate substances by their boiling point?

a)

Filtration

b)

Evaporation

c)

Crystallization

d)

Distillation

32.

Describe brief methods for separating a mixture of iron, sand, water, and oil.

4 lines
33.

Which technique would you use to separate salt that has dissolved in water?

a)

filtration

b)

screening

c)

evaporation

d)

centrifugation

34.

You do not like almond nuts in your vegetable salad. Are you going to do to get rid of those?

a)

using strainer

b)

use distillation process

c)

boil the vegetable salad and let almond evaporate

d)

pick them one by one

35.

What process of separating mixture is illustrated on the animated gif posted here?

a)

decantation

b)

distillation

c)

evaporation

d)

condensation

36.

Water changes to water vapor.

a)

condensation

b)

evaporation

c)

precipitation

d)

sublimation

37.

Dry ice is solid. When it is left under room temperature it gives off gas. What process is this?

a)

evaporation

b)

distillation

c)

decantation

d)

sublimation

38.

Metals can be flattened like a sheet. What do you call this physical property of matter?

a)

malleability

b)

flammability

c)

corrosiveness

d)

conductivity

39.

This method is utilized in industries like junkyards to remove metal scraps from other materials.

a)

chromatography

b)

physical manipulation

c)

use of magnet

d)

distillation

40.
Two or more substances mingled together, but not chemically combined are known as a
a)
residue
b)
solution
c)
distillate
d)
mixture
41.

What kind of mixture is a combination of substances that has uniform composition and appearance?

a)

colloid

b)

heteregenous

c)

homogeneous

d)

suspension

42.

The following image represents: (Note: each particle is an element.)

a)
a mixture of elements and compounds
b)
particles of a solid element
c)
particles of a gaseous element
d)
a solid compound
e)
a mixture of elements
43.

The following image represents:

(Note: All the atoms are the same element)

a)
a mixture of elements and compounds
b)
particles of a pure solid element
c)
particles of a pure gaseous element
d)
a pure solid compound
e)
a mixture of elements
44.
The following image represents:
a)
a mixture of elements and compounds
b)
particles of a solid element
c)
particles of a gaseous element
d)
a solid compound
e)
a mixture of elements
45.
This substance can be separated through physical means.
a)
element
b)
compound
c)
mixture
d)
pure substance
46.
This substance can be either homogeneous or heterogeneous.
a)
element
b)
compound
c)
mixture
d)
pure substance
47.
This simplest pure substance cannot be broken down by physical or chemical means.
a)
element
b)
compound
c)
mixture
d)
pure substance
48.
The composition of this substance is variable, its physical properties depend on the composition.
a)
element
b)
compound
c)
mixture
d)
pure substance
49.
This substance consists of two or more different elements bonded in a fixed mass ratio.
a)
element
b)
compound
c)
mixture
d)
pure substance
50.

For paper chromatography to work,

a)

the dyes must have different boiling points.

b)

the dyes must have different solubilities in the solvent.

c)

the starting line on the chromatogram must be drawn using pen.

d)

The starting line must be below the level of the solvent.

51.

Which ink is a mixture?

a)

Blue

b)

Red

c)

Yellow

d)

Black

52.

Air

a)

Heterogeneous

b)

Homogeneous

53.

M&Ms

a)

Heterogeneous

b)

Homogeneous

54.
What type of mixture is this?
a)
homogenous mixture
b)
chemical
c)
heterogeneous mixture 
d)
solid mix
55.

Which is a pure substance?

a)
b)
c)
d)

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