science2.0

Question 1

What is a suspension?

Answer 1

A suspension is a heterogeneous mixture in which solid particles are dispersed in a liquid or gas.

Question 2

True or False: In a colloid, the dispersed particles are larger than those in a solution but smaller than those in a suspension.

Answer 2

True

Question 3

What is the main characteristic of a solution?

Answer 3

A solution is a homogeneous mixture where the solute is completely dissolved in the solvent.

Question 4

Fill in the blank: A _______ is a mixture that does not settle out upon standing.

Answer 4

colloid

Question 5

What separates mixtures based on differences in particle size?

Answer 5

Filtration

Question 6

Which method would you use to separate a saltwater solution?

Answer 6

Evaporation

Question 7

Multiple Choice: Which of the following is NOT a pure substance? A) Water B) Sugar C) Air D) Gold

Answer 7

C) Air

Question 8

What is the term for a mixture that consists of two or more substances that are not chemically combined?

Answer 8

Mixture

Question 9

True or False: Colloids can scatter light, a phenomenon known as the Tyndall effect.

Answer 9

True

Question 10

What is the difference between a homogeneous mixture and a heterogeneous mixture?

Answer 10

A homogeneous mixture has a uniform composition, while a heterogeneous mixture contains distinct, separate components.

Question 11

Fill in the blank: Solutions are typically made of a solute and a _______.

Answer 11

solvent

Question 12

Which type of separation technique uses a centrifuge?

Answer 12

Centrifugation

Question 13

What defines a pure substance?

Answer 13

A pure substance has a constant composition and distinct properties.

Question 14

Multiple Choice: Which of the following is an example of a colloid? A) Olive oil B) Milk C) Sand D) Air

Answer 14

B) Milk

Question 15

What is sedimentation?

Answer 15

Sedimentation is the process where solid particles settle to the bottom of a liquid mixture.

Question 16

True or False: Solutions can be separated into their components by physical means.

Answer 16

False

Question 17

What is the main component of an emulsion?

Answer 17

Two immiscible liquids.

Question 18

Fill in the blank: The process of _______ involves using temperature to separate components of a mixture.

Answer 18

distillation

Question 19

Multiple Choice: Which of the following mixtures is considered a suspension? A) Saltwater B) Sugar water C) Muddy water D) Air

Answer 19

C) Muddy water

Question 20

What type of mixture is formed when particles are evenly distributed but not chemically bonded?

Answer 20

Mixture

Question 21

True or False: All solutions are clear.

Answer 21

False

Question 22

What is the process called when a solute dissolves in a solvent?

Answer 22

Dissolution

Question 23

Fill in the blank: A _______ can be separated into its components through filtration.

Answer 23

suspension

Question 24

What is a solute?

Answer 24

A solute is a substance that is dissolved in a solvent to form a solution.

Question 25

Multiple Choice: What is the primary characteristic of a colloid? A) It settles over time B) It has a uniform composition C) It scatters light D) It is a solid

Answer 25

C) It scatters light

Question 26

What technique would you use to separate a mixture of colored dyes?

Answer 26

Chromatography

Question 27

True or False: All mixtures can be classified as either homogeneous or heterogeneous.

Answer 27

True

Question 28

What is the difference between a solvent and a solute?

Answer 28

The solvent is the substance that dissolves the solute, which is the substance being dissolved.

Question 29

Fill in the blank: A _______ consists of two or more phases.

Answer 29

heterogeneous mixture

Question 30

What is the process called when a liquid turns into vapor?

Answer 30

Evaporation

Question 31

Multiple Choice: Which of the following is an example of a pure substance? A) Vinegar B) Steel C) Helium D) Fruit salad

Answer 31

C) Helium

Question 32

What is the term for the process of removing solid particles from a mixture by passing it through a filter?

Answer 32

Filtration