Question 1

Match the properties of water to their correct descriptions

Question 2

Most liquids become more dense as they cool. Water becomes less dense because its molecules do what?

Accepted Answer

expand when frozen

Answer

condense when frozen

Question 3

Water molecules are polar molecules. What is meant by the term polar molecule?

Accepted Answer

a molecule that has an overall positive charge on one end and an overall negative charge on the other end

Answer

a molecule that has no charge on one end and either an overall negative or positive charge on the other end

Answer

a molecule that has an overall positive charge on one end, as well as an overall positive charge on the other end

Answer

a molecule that has an overall negative charge on one end, as well as an overall negative charge on the other end

Question 4

A water molecule contains two hydrogen atoms and one oxygen atom. Which of the following statements about water molecules is true?

Accepted Answer

The oxygen atom is negatively charged and the hydrogen atoms are positively charged.

Answer

All of the atoms have a negative charge.

Answer

The oxygen atom is positively charged and the hydrogen atoms are negatively charged.

Answer

All of the atoms have a positive charge.

Question 5

The three states of water that exist on Earth can not change into one another.

Accepted Answer

false

Answer

true

Question 6

What allows one water molecule to stick to another water molecule?

Accepted Answer

hydrogen bonds & polarity

Answer

universal solvent & specific heat

Answer

adhesion & cohesion

Answer

specific heat & polarity

Question 7

What happens when water freezes?

Accepted Answer

It expands and becomes less dense, resulting in floating ice.

Answer

It expands and becomes more dense, resulting in floating ice.

Answer

It expands and becomes more dense, resulting in sinking ice.

Answer

It expands and becomes less dense, resulting in sinking ice.

Question 8

How does cohesion and adhesion benefit a plant?

Accepted Answer

It allows water to travel through the xylem of a plant, from the roots to a leaf.

Answer

It allows water to travel through the xylem of a plant, from a leaf to the roots.

Answer

It allows oxygen to travel through the phloem of a plant, from the roots to a leaf.

Answer

It allows carbon dioxide to travel through the xylem of a plant, from the roots to a leaf.

Question 9

Match the following pH ranges with their descriptions:

Question 10

What is an acid?

Accepted Answer

a substance that releases H+ ions when dissolved in water

Answer

a substance that releases OH- when dissolved in water

Answer

a substance that releases an equal amount of OH- and H+ ions when dissolved in water

Answer

a substance that does not release any ions when dissolved in water

Question 11

Water has a neutral because

Accepted Answer

it has an equal amount of H+ and OH- in solution

Answer

it does not produce any ions

Answer

it has more OH- ions than H+

Answer

it has more H+ ions than OH-

Question 12

According to the pH range which substance is more acidic than lemon juice

Accepted Answer

stomach acid

Answer

drain cleaner

Answer

milk

Answer

vinegar

Question 13

A solution has a pH of 4.0. What would happen to the pH if it was diluted with water?

Accepted Answer

pH would increase

Answer

pH would decrease

Question 14

A solution with a pH of 10 is mixed with a solution with a pH of 4. What would the pH of the mixture most likely be?

Accepted Answer

7

Answer

10

Answer

4

Answer

14

Question 15

Which of the following is the weakest acid?

Accepted Answer

6.99

Answer

1.00

Answer

14.00

Answer

7.01

Question 16

Match the following items according to their pH strength

Question 17

Which of the following is the strongest acid?

Accepted Answer

1

Answer

4

Answer

14

Answer

10

Question 18

Which of the following is the strongest base?

Accepted Answer

14

Answer

10

Answer

4

Answer

1

Question 19

Which of the following is the weakest acid?

Accepted Answer

6.99

Answer

14.00

Answer

1.00

Answer

7.01

Question 20

Which of the following is the weakest base?

Accepted Answer

6.99

Answer

1.00

Answer

7.01

Answer

14.00

Question 21

Which best illustrates the solid ice shape of the molecules?

Accepted Answer

https://uploads.quizalize.com/b6cf1a09-4d37-45ea-b10c-34cbc4f1e8b6/question/866511ebea26f35ae7092d744805053689bbd622.jpeg

Answer

https://uploads.quizalize.com/b6cf1a09-4d37-45ea-b10c-34cbc4f1e8b6/question/2f158d4eb2209282f34d8f0ac9b80368e1ee5bc6.jpeg

Answer

https://uploads.quizalize.com/b6cf1a09-4d37-45ea-b10c-34cbc4f1e8b6/question/5b703037507519ebdb9625a5b5ba0a0d8da1e940.jpeg

Question 22

Which best represents the polarity of a water molecule?

Accepted Answer

https://uploads.quizalize.com/b6cf1a09-4d37-45ea-b10c-34cbc4f1e8b6/question/f1cd133455906cec324eb45290d930e826d498cf.jpeg

Answer

https://uploads.quizalize.com/b6cf1a09-4d37-45ea-b10c-34cbc4f1e8b6/question/86e360080b50f865e0d13cdc897428dcdaf302e6.jpeg

Answer

https://uploads.quizalize.com/b6cf1a09-4d37-45ea-b10c-34cbc4f1e8b6/question/6f915d29ab41c46c7215f6e000e5a9ad0b101ec6.jpeg

Answer

https://uploads.quizalize.com/b6cf1a09-4d37-45ea-b10c-34cbc4f1e8b6/question/fe3c92cec6f82208706f7d7f34b64e79d52d9c4f.jpeg

Question 23

Attractions between the negative Oxygen atom of one water molecule and the positive Hydrogen atom of another water molecule are called

Accepted Answer

Hydrogen bonds

Answer

Ionic bonds

Answer

Covalent bonds

Answer

Polar bonds

Question 24

Water striders can walk across the surface of calm water. Their feet push the surface of the water down slightly, but they do not break the surface. Why?

Accepted Answer

The insects are light enough so they do not break the hydrogen bonds holding the water molecules together.

Answer

The insects actually use their wings to hover slightly above the water’s surface and they only skim it with their feet.

Answer

The insects are small enough to see the individual water molecules, so they are able to step carefully from one molecule to the next.

Answer

The insect’s feet are non-polar, so they are repelled by the polar water molecules and are pushed away from the water’s surface.

Question 25

Water is essential for life. Its special properties make water the single most important molecule in plant life. Which of the following properties of water enables it to move from the roots to the leaves of plants?

Accepted Answer

Water exhibits cohesive behavior.

Answer

Water expands as it freezes.

Answer

Water resists change in temperature.

Answer

Water is an excellent solvent.

Question 26

Many fish and aquatic plants can survive a cold winter because the layer of ice that forms at the top of the lake insulates the water below and prevents the lake from freezing solid. What unique property of water contributes to this effect?

Accepted Answer

Water expands and becomes less dense when it freezes.

Answer

Water forms hydrogen bonds with ions and other polar substances.

Answer

Water absorbs heat when it evaporates and forms a gas

Answer

Water molecules completely separate into ions in solutions.

Question 27

Why does water move from the roots to the leaves of plants?

Accepted Answer

Capillary action pulls the water molecules like a chain

Answer

Water is pulled by gravity

Answer

Water’s cohesion causes it to “pull” towards the leaves

Answer

Water is pushed by solutes

Question 28

What is the main difference between cohesion and adhesion?

Accepted Answer

Cohesion is the attraction between molecules of the same substance, while adhesion is the attraction between molecules of different substances

Answer

Cohesion is the ability of a substance to stick to other surfaces, while adhesion is the ability of a substance to flow

Answer

Cohesion is the attraction between molecules of different substances, while adhesion is the attraction between molecules of the same substance

Answer

Cohesion is the ability of a substance to flow, while adhesion is the ability of a substance to stick to other surfaces

Question 29

Match the following properties with their examples:

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