Quiz about Chemical Reactions Review

Question 1

Question 1.

Accepted Answer

compound

Answer

element

Answer

solution

Answer

atom

Question 2

Question 2.

Accepted Answer

b. hydrogen

Answer

a. carbon

Answer

c. nitrogen

Answer

d. oxygen

Question 3

Question 3.

Accepted Answer

3

Answer

2

Answer

4

Answer

9

Question 4

Analyze the diagram, then answer the questions 
What substance is the inner glass tube filled with?

Accepted Answer

Hydrogen peroxide solution

Answer

Hydrogen

Answer

Carbon

Answer

Phenylethynyl

Question 5

Question 5.

Accepted Answer

12

Answer

3

Answer

24

Answer

6

Question 6

Question 6.

Accepted Answer

2

Answer

6

Answer

3

Answer

8

Question 7

Identify the following as an endothermic or exothermic reaction.

Accepted Answer

Endothermic

Answer

Exothermic

Question 8

Analyze the diagram then answer the questions 
Atoms of which element make up most of the molecule in the diagram? (hint look at the chemical formula)

Accepted Answer

Carbon

Answer

Hydrogen

Answer

Anthracene

Answer

Phenylethynyl

Question 9

Instant heat packs are used by athletes to warm and ease the pain from torn or injured muscles.  They relieve pain and speed up healing.  The heat pack contains calcium chloride and an inner bag of baking soda solution.  When the inner bag is broken, the calcium chloride dissolves in the solution and releases energy in the form of heat.                                                                   What type of reaction is the chemical process described above in a heat pack?

Accepted Answer

Exothermic

Answer

Endothermic

Answer

Neither

Question 10

Any substance that results from a chemical reaction is called a...

Accepted Answer

product.

Answer

producer.

Answer

reactant.

Answer

ingredient.

Question 11

A ____________________ reaction is a process in which some substances change to other substances as chemical bonds break and reform.

Accepted Answer

chemical

Answer

physical

Answer

statistical

Answer

physiological.

Question 12

Signs that a chemical change has occurred include

Accepted Answer

all of the above

Answer

a change in color.

Answer

the release of bubbles.

Answer

the production of an odor.

Question 13

Question 13.

Accepted Answer

Option B is correct

Answer

A.

Answer

C.

Answer

D.

Question 14

If two carbon (2C) atoms combine with two oxygen (2O) atoms to form new molecules how many of each atom will be found in the product?      
         2C  + 2O   ---->  ?

Accepted Answer

D.  two carbon and two oxygen

Answer

A.  one carbon and two oxygen

Answer

B.  two carbon and three oxygen

Answer

C.  three carbon and four oxygen

Question 15

Does the image below support the Law of Conservation of Mass?

Accepted Answer

Yes

Answer

No

Question 16

Does the image below represent the Law of Conservation of Mass?

Accepted Answer

Yes

Answer

No

Question 17

During any chemical reaction, the mass of the ______________ is always ______________ to the mass of the reactants

Accepted Answer

Products, equal

Answer

Reactants, equal

Answer

Reactant, different

Answer

Products, different

Question 18

Use the chemical equation for photosynthesis below, identify which substances are the products...

Accepted Answer

glucose and oxygen

Answer

carbon dioxide, glucose, and water

Answer

carbon dioxide and water

Answer

glucose, oxygen and carbon dioxide

Question 19

How do you know which are the products in the chemical equation for photosynthesis below:

Accepted Answer

They are found on the right side of the chemical equation

Answer

They are found on the left side of the chemical equation

Answer

They are the largest substances in the chemical equation

Answer

They are what is produced in this reaction

Question 20

Two different chemical reactions take place in two separate test tubes. The results of the reactions on the test tubes are shown below.   What can be concluded about the two reactions?

Accepted Answer

Reaction in test tube A is exothermic while that in test tube B is endothermic.

Answer

Reaction in test tube A is endothermic while that in test tube B is exothermic.

Answer

Both reactions are exothermic.

Answer

Both reactions are endothermic.

Question 21

Photosynthesis
The leaves of plants absorb energy from the sun to power the chemical reaction of photosynthesis, where carbon dioxide and water combine to produce sugar and oxygen. The chemical equation for photosynthesis below, identify if this is an example of an endothermic or exothermic reaction.

Accepted Answer

Endothermic

Answer

Exothermic

Question 22

Instant cold Pack: When the inner bag of an instant cold pack is broken, it causes water to mix with a chemical such as ammonium nitrate. The substances react and the bag becomes cold. is this an example of an endothermic or exothermic reaction?

Accepted Answer

Exothermic

Answer

Endothermic

Question 23

Use the chemical equation for respiration below, identify if this is an example of an endothermic or exothermic reaction.
CH4 + 2O2 ---------->  CO2 +  2H2O + Energy

Accepted Answer

Exothermic

Answer

Endothermic

Question 24

Use the diagram below to answer the following, 
 According to the law of conservation of mass, how much Zinc (Zn) is present in the product?

Accepted Answer

C. 104 g

Answer

A. 40 g

Answer

B. 88 g

Answer

D. 256 g

Question 25

Question 25.

Accepted Answer

Option B is correct

Answer

A.

Answer

C.

Answer

D.

Question 26

These reactions release energy to the environment, often in the form of heat or light, for example burning of wood.

Accepted Answer

Exothermic

Answer

Endothermic

Answer

Thermic

Question 27

Question 27.

Accepted Answer

A.the same

Answer

B.different

Question 28

Question 28.

Accepted Answer

B.different

Answer

A.identical

Question 29

Question 29.

Accepted Answer

A.equal to

Answer

B.less than

Answer

C.greater than

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