Chem Test

Question 1

What is the definition of a solid?

Answer 1

A solid is a state of matter characterized by structural rigidity and resistance to changes in shape and volume.

Question 2

True or False: Solids have a definite shape and volume.

Answer 2

True

Question 3

Fill in the blank: Solids are composed of tightly packed ________ that vibrate but do not move from their fixed positions.

Answer 3

atoms

Question 4

What is a liquid

Answer 4

A liquid is a non tightly packed touching compound

Question 5

What is the definition of gas?

Answer 5

Gas is one of the four fundamental states of matter, characterized by its ability to expand and fill the shape of its container.

Question 6

Fill in the blank: The particles in a gas are _____ compared to solids and liquids.

Answer 6

farther apart

Question 7

Which of the following is NOT a property of gases? A) Compressibility B) High density C) Expandability D) Low viscosity

Answer 7

B) High density

Question 8

What happens to gas pressure when the volume decreases while temperature remains constant?

Answer 8

The gas pressure increases.

Question 9

What is evaporation?

Answer 9

Evaporation is the process by which liquid molecules gain enough energy to transform into vapor.

Question 10

True or False: Evaporation occurs at all temperatures.

Answer 10

True

Question 11

Fill in the blank: The rate of evaporation increases with _____ temperature.

Answer 11

increasing

Question 12

Which of the following factors does NOT affect evaporation? A) Temperature B) Humidity C) Color of the liquid

Answer 12

C) Color of the liquid

Question 13

What is the primary energy source that drives the evaporation process?

Answer 13

The sun’s energy (solar radiation)

Question 14

What is distillation?

Answer 14

Distillation is a separation process that involves heating a liquid to create vapor and then cooling the vapor to create a liquid.

Question 15

True or False: Distillation can be used to separate mixtures based on differences in boiling points.

Answer 15

True

Question 16

Fill in the blank: In distillation, the liquid that is collected after condensation is called __________.

Answer 16

distillate

Question 17

Which of the following is a common use of distillation? A) Creating electricity B) Purifying water C) Growing plants

Answer 17

B) Purifying water

Question 18

What is the primary principle behind distillation?

Answer 18

The primary principle behind distillation is the difference in boiling points of the components in a mixture.