Particle Theory Review

Question 1

True or False.

In any substance the particles are held together by attractive forces called bonds.

Answer 1

True

Question 2

True or False.

According to the acronym “PISAM” all substance are made up of poisons.

Answer 2

False. The substances are made up of particles.

Question 3

True or False.

According to the S in the Particle theory (PISAM), there are solutions between the particles.

Answer 3

False. There are spaces between the particles.

Question 4

The M is “PISAM” stands for the fact that all particles are always moving.

Answer 4

True.

Question 5

The math formula for density can be written as density = volume / mass

Answer 5

False. Density = mass / volume

Question 6

Pure water has a density of 0.79g/mL

Answer 6

False. Alcohol has the density of 0.79g/mL

Question 7

When water boils, the temperature keeps rising until it has all turned to vapour.

Answer 7

False. The temperature stays the same.

Question 8

Which of the following is a characteristic property of water?

a) Water is a colourless liquid.
b) Water can dissolve food colouring.
c) Water has a boiling point of 100*C
d) Water is liquid at room temperature.

Answer 8

c) Water has a boiling point of 100*C

Question 9

Why does reducing the air pressure on shaving cream result in an increase in its volume.

a) Reducing air pressure causes a temperature increase.
b) A reduction in air pressure causes it to go past its due date.
c) A reduction in air pressure allows the molecules to move faster.
d) A reduction in air pressure increases the strength of the bonds.

Answer 9

c) A reduction in air pressure allows the molecules to move faster.

Question 10

50 mL of water plus 50 mL of salt makes 90mL of solution because:

a) the salt particles fit into the spaces between water molecules.
b) the salt particles react with and use up the water molecules.
c) the water molecules evaporate when they come into contact with the hot salt.
d) the water molecules break the salt down to a gas that bubbles out.

Answer 10

d) the water molecules break the salt down to a gas that bubbles out.

Question 11

Which statement is not a point in the particle theory.

a) All matter is made of small particles.
b) The particles of matter are in constant motion.
c) There are forces of attraction between the particles.
d) All particles in all substances are identical

Answer 11

d) All particles in all substances are identical

Question 12

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

a) cutting grass.
b) rusting a nail.
c) percolating coffee
d) clothes drying on a line

Answer 12

b) rusting a nail.

Question 13

A quantitative property of magnesium is:

a) it is a flexible metal.
b) it reacts with acid to produce hydrogen
c) it has a density of 1.7 g/cm³
d) it shines when polished with sandpaper

Answer 13

c) it has a density of 1.7 g/cm³

Question 14

Which of the following mixtures is a solution?

a) a peanut butter Oreo blizzard
b) Gatorade
c) chocolate milk
d) Orange juice

Answer 14

b) Gatorade

Question 15

Absolute zero describes:

a) the temperature when particles stop moving
b) the chances of Montréal winning the Stanley Cup this year
c) the volume of the gas when it turns to solid
d) the pressure exerted by the particles of a solid

Answer 15

a) the temperature when particles stop moving

Question 16

When you add salt to a sample of ice, the melting point of the ice goes ____.

Answer 16

Down

Question 17

When you add 50 mL of salt 50 mL of water, you find the total volume of the mixture is ____ then 100 mL.

Answer 17

Less

Question 18

The fact that a paperclip can be floated on water but not alcohol proves that the bonds and alcohol are ____ then the bonds in water.

Answer 18

Weaker

Question 19

If there is a buildup of ice on your sidewalk and it is -20° outside, you can _____ _____ to it to make it melt without adding extra heat.

Answer 19

Add salt

Question 20

When you look at temperature time graph for water. You can see a flat part at 0°C. This indicates the ______ _____ for water is 0°C.

Answer 20

Melting point

Question 21

In the following observation taken from one of your labs: “the white powder dissolved in the water and the temperature went down by 15°C”, a quantitative observation was ______________

Answer 21

Went down by 15°C

Question 22

P for every substance is _______.

Answer 22

Made of particles

Question 23

I stands for particles of a pure substance are______

Answer 23

Identical

Question 24

S stands for there are large ______

Answer 24

Spaces between particles

Question 25

A stands for __________ hold particles together

Answer 25

Attractive forces

Question 26

M stands for particles of all substances are _________

Answer 26

always moving