Quiz about Unit 1 Chemical Reactions Review

Question 1

A chemical reaction that absorbs heat.

Accepted Answer

Endothermic

Answer

Exothermic

Answer

Catalyst

Answer

Inhibitor

Question 2

A chemical reaction that releases heat.

Accepted Answer

Exothermic

Answer

Endothermic

Answer

Catalyst

Answer

Inhibitor

Question 3

Substances that form in a chemical reaction.

Accepted Answer

Products

Answer

Reactants

Answer

Producers

Answer

Reactions

Question 4

The original substances in a chemical reaction.

Accepted Answer

Reactants

Answer

Products

Answer

Yields

Answer

Elements

Question 5

_____________ changes do not change the substance into something different.

Accepted Answer

Physical

Answer

Chemical

Answer

Both chemical and physical

Question 6

______________ changes will change the substance into something with different properties.

Accepted Answer

Chemical

Answer

Physical

Answer

Both chemical and physical

Question 7

A force that holds atoms together.

Accepted Answer

chemical bond

Answer

molecules

Answer

physical bond

Answer

compounds

Question 8

The building blocks of matter are ________________.

Accepted Answer

atoms

Answer

elements

Answer

molecules

Answer

compounds

Question 9

Look at the diagram to see if the chemical reaction shown models the Law of Conservation of Matter.

Accepted Answer

No

Answer

Yes

Question 10

How many hydrogen atoms are found on the reactant side of the chemical equation shown?

Accepted Answer

6

Answer

3

Answer

8

Answer

2

Question 11

How many oxygen atoms are shown on the product side in the chemical equation shown?

Accepted Answer

18

Answer

6

Answer

12

Answer

36

Question 12

Is the chemical equation shown balanced?

Accepted Answer

No

Answer

Yes

Question 13

Identify the number of atoms in the chemical formula for Potassium Chromate. The chemical formula is shown in the picture.

Accepted Answer

28

Answer

4

Answer

8

Answer

25

Question 14

Identify the number of elements in the chemical formula for Calcium Sulfate. The chemical formula for Calcium Sulfate can be seen in the picture.

Accepted Answer

3

Answer

12

Answer

4

Answer

6

Question 15

Identify the number of molecules in the chemical formula for Butane. The chemical formula for Butane is shown in the picture.

Accepted Answer

5

Answer

70

Answer

14

Answer

20

Question 16

How many molecules are shown in the diagram?

Accepted Answer

3

Answer

2

Answer

9

Question 17

Particles of a suspension will settle while particles of a colloid do not. Why does this happen?

Accepted Answer

The particles in a suspension are larger than the particles in a colloid.

Answer

The particles in a suspension are smaller than the particles in a colloid.

Answer

The particles in a suspension have a higher temperature than the particles in a colloid.

Answer

The particles in a suspension have a lower temperature than the particles in a colloid.

Question 18

Why is baking soda considered a pure substance but flour is not?

Accepted Answer

Baking soda is a compound and flour is a mixture.

Answer

Baking soda is an element and flour is a mixture.

Answer

Baking soda is a mixture and flour is a compound.

Answer

Baking soda is a mixture and flour is an element.

Question 19

What is oxygen classified as?

Accepted Answer

An element

Answer

A compound

Answer

A molecule

Answer

A mixture

Question 20

Identify the type of chemical reaction given in the picture.

Accepted Answer

Decomposition

Answer

Synthesis

Answer

Single Replacement

Answer

Double Replacement

Question 21

If you want to store uncooked meat to keep it from spoiling, which would keep it longer and why?

Accepted Answer

A freezer because lowering the temperature slows the chemical reactions.

Answer

A refrigerator because increasing the temperature slows the chemical reactions.

Answer

A freezer because lowering the temperature slows physical reactions.

Answer

A refrigerator because increasing the temperature slows the physical reactions.

Question 22

A substance that speeds up the rate of reaction when added is called a/an __________.

Accepted Answer

catalyst

Answer

inhibitor

Answer

exothermic reaction

Answer

endothermic reaction

Question 23

In a solution, which part is the solute, the drink mix or water?

Accepted Answer

drink mix

Answer

water

Question 24

In what type of reaction does one reactant form two or more products?

Accepted Answer

Decomposition

Answer

Synthesis

Answer

Single Replacement

Answer

Double Replacement

Question 25

Identify the type of chemical reaction shown in the chemical equation pictured.

Accepted Answer

Single Replacement

Answer

Synthesis

Answer

Decomposition

Answer

Double Replacement

Question 26

Identify what type of chemical reaction is being modeled.

Accepted Answer

Decomposition

Answer

Synthesis

Answer

Single Replacement

Answer

Double Replacement

Question 27

Identify what type of chemical reaction is being shown in the picture.

Accepted Answer

Double Replacement

Answer

Synthesis

Answer

Decomposition

Answer

Single Replacement

Question 28

An example of a natural fiber would be __________.

Accepted Answer

silk

Answer

nylon

Answer

spandex

Answer

rayon

Question 29

This is a number placed in front of a chemical formula that shows how many molecules there are.

Accepted Answer

coefficient

Answer

subscript

Answer

exponent

Answer

superscript

Question 30

Which of the following is NOT a natural resource?

Accepted Answer

plastic

Answer

wood

Answer

cotton

Answer

oil

Answer

coal

Question 31

Synthetic Materials tend to be ___________________ than Natural materials.

Accepted Answer

more durable

Answer

less durable

Answer

just as durable

Question 32

What is the number of protons that the element in this image contain?

Accepted Answer

7

Answer

14

Answer

15

Answer

18

Question 33

How many nitrogen atoms are in this compound?

Accepted Answer

1

Answer

2

Answer

4

Question 34

Which of the following is considered a synthetic substance?

Accepted Answer

Plastic

Answer

Plant Fibers

Answer

Petroleum

Answer

Wood

Question 35

What is a synthetic material?

Accepted Answer

Any material that is man made

Answer

Any material that is only made from natural resources

Answer

Any material that is made of recycled materials

Answer

Any material that is found in nature.

Question 36

What is a polymer?

Accepted Answer

a long chain of repeating molecules

Answer

a group of repeating atoms

Answer

a long chain molecule with identical group of atoms

Answer

a long chain of different atoms

Question 37

What is the definition of matter?

Accepted Answer

Anything that has mass and takes up space

Answer

A substance that is liquid, solid, or gas

Answer

Anything that is pure

Answer

Anything that you can see or hold

Question 38

How does a solution become supersaturated?

Accepted Answer

dissolve more solute than you should be able to.

Answer

dissolve lots of solute in it.

Answer

dissolve a little solute in it.

Answer

dissolve a solvent in it.

Question 39

What does it mean to dilute a solution?

Accepted Answer

lower the concentration of solute per solvent

Answer

increase the concentration of solute per solvent

Question 40

Solubility is what type of property?

Accepted Answer

Physical Proeprty

Answer

Chemical Property

Question 41

Plastic is an example of a(n) ______________________ because it is made from natural resources that have been chemically processed.

Accepted Answer

synthetic material

Answer

natural material

Answer

biodegradable material

Answer

organic material

Question 42

______________________ can be chemically processed to make synthetic materials.

Accepted Answer

Natural resources

Answer

Metals

Answer

Water

Answer

Air

Question 43

Synthetic materials are made up of:

Accepted Answer

natural resources

Answer

Natural fibers

Answer

Minerals

Answer

Metals

Question 44

Juan observes these properties of an unknown substance. The substance is white, has a crystaline structure, dissolves in water and burns when a flame is applied. What is a chemical property of the substance?

Accepted Answer

burns

Answer

color

Answer

crystaline structure

Answer

dissolves

Question 45

Which one of these is a chemical property?

Accepted Answer

flammability

Answer

melting point

Answer

boiling point

Answer

color

Question 46

Water is boiled in a bottle with a balloon over the top. As the water heats, the balloon expands. What has happened to the weight of this bottle and balloon in this experiment?

Accepted Answer

It has stayed the same.

Answer

It has increased as the balloon expands.

Answer

It has decreased as the water boiled away.

Answer

It is unpredictable because the balloon is flexible.

Question 47

5 grams of orange Kool Aid powder is added to 100 grams of water. What would you expect the new solution to weigh?

Accepted Answer

105 grams

Answer

95 grams

Answer

100 grams

Answer

500 grams

Question 48

When you break a cracker into pieces it is a...

Accepted Answer

Physical change

Answer

Chemical change

Question 49

A copper penny turning greenish after a few years is an example of ...

Accepted Answer

Chemical Change

Answer

Physical Change

Question 50

A change in phase ...

Accepted Answer

Physical Change

Answer

Chemical Change

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