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Chemical Reactions Review

Total questions: 62

Worksheet time: 1hrs 14mins

Name
Class
Date
1.

The compound with a pink square is known as a ___.

a)

Reactant

b)

Product

2.

In order for this equation to be balanced, what number must be written as a coefficient for the substance in the blue box?

a)

1

b)

2

c)

4

d)

0

3.

Which type of reaction is shown?

a)

Combustion

b)

single replacement

c)

double replacement

d)

decomposition

4.

What must be done to this equation for it to be balanced?

a)

change the subscript to 3 in the reactants

b)

change the subscript to 3 in the products

c)

no change; it's balanced as is

d)

change the coefficients to 2

5.

What type of reaction is shown?

a)

Decomposition

b)

Single replacement

c)

Combustion

d)

Combination (or Synthesis)

6.

To balance this equation, what coefficient belongs in the red box?

a)

3

b)

2

c)

1

d)

0

7.

What type of reaction is this?

a)

Combination (or Synthesis)

b)

Single replacement

c)

Double replacement

d)

Decomposition

8.

Which type of reaction is shown?

a)

Combustion

b)

Combination (or Synthesis)

c)

Decomposition

d)

Double replacement

9.

Which type of chemical reaction involves the production of a single complex compound from several simpler reactants?

a)

Decomposition

b)

Combustion

c)

Combination (or Synthesis)

d)

Single replacement

10.

What are the products of a combustion reaction?

a)

a single complex compound

b)

several simpler elements

c)

carbon dioxide and water

d)

carbon dioxide and hydrogen

11.

Which element is always present in the reactants of a combustion reaction?

a)

oxygen

b)

hydrogen

c)

carbon

d)

water

12.

Which type of reaction is shown?

a)

Single replacement

b)

Double replacement

c)

Combustion

d)

Decomposition

13.

To balance this equation, what coefficient must be written in the red box?

a)

1

b)

2

c)

4

d)

5

14.

Which of the following is an example of a synthesis reaction?

a)
b)
c)
d)
15.

Which of the following is an example of a decomposition reaction?

a)
b)
c)
d)
16.

Which of the following is an example of a single replacement reaction?

a)
b)
c)
d)
17.

Which of the following is an example of a double replacement reaction?

a)
b)
c)
d)
18.

The red numbers in the image represent

a)

subscripts

b)

coeffiecients

c)

roman numerals

d)

none of the answer options are correct

19.

The blue numbers in the image represent

a)

subscripts

b)

coeffiecients

c)

roman numerals

d)

none of the answer options are correct

20.

When balanced, the correct coefficients for the reaction are:

a)

1, 1, 1, 1

b)

1, 2, 1, 1

c)

2, 1, 1, 2

d)

2, 1, 2, 1

21.

Why must the number of atoms on either side of the arrow be equal to each other in a chemical equation?

a)

to abide by the law of conservation of energy

b)

to abide by law of conservation of mass

c)

to abide by the law of fundamental equations

d)

because everything must be even for the universe to stay in balance

22.

When balancing a chemical equation, you can only change _________, you can never change _______!

a)

coefficients, subscripts

b)

subscripts, coefficients

c)

formulas, subscripts

d)

coefficients, formula units

23.
Which of the following is the general formula for a decomposition reaction?
a)
A + B  → AB
b)
AB → A + B
c)
AB + C → AC + B
d)
AB + CD → AC + BD
24.

What state of matter is this substance?

a)

solid

b)

liquid

c)

gas

d)

aqueous

25.

Predict the product(s) of this reaction (don't worry about balancing):

Li + H2O →

a)

Li2O + H2

b)

LiO + H2

c)

LiOH + H2

d)

Li(OH)2

26.

Predict the product(s) of this reaction (don't worry about balancing):

Mg + HCl →

a)

MgHCl

b)

MgCl2 + H2

c)

MgCl2 + H

d)

MgCl + H2

27.

Predict the product(s) of this reaction (don't worry about balancing):

SrI2 +Br2→

a)

Sr + I2Br2

b)

SrBr + I2

c)

SrBr2 + I2

d)

Sr + IBr2

28.
Predict the product(s) of this reaction (don't worry about balancing):
C12H22O11 + O2 →
a)
CO + HO
b)
CO2
c)
CO2 + H2O
d)
H2O
29.
Predict the product(s) of this reaction (Don't worry about balancing) 
Pb(NO3)2  +  KI →
a)
PbK +  I NO3
b)
not possible
c)
PbI2  +  KNO3
d)
PbI  + KNO3
30.

Fill in the blank. (Copper has a charge of 2+)

Cu+ AgNO3 → Ag + _____

a)

Cu(NO3)2

b)

CuNO3

c)

CuAg

d)

Cu

31.
 Predict the product(s):  H2O -->
a)
H and O
b)
H2 and O2
c)
H and OH
32.
in a reaction, aqueous barium chloride reacts with aqueous potassium carbonate to produce solid barium carbonate and aqueous potassium chloride. what is the correct balanced equation.
a)
Ba2Cl(aq) + KCO3(aq) --> BaCO3(s) + KCl(aq)
b)
BaCl2(aq) + K2CO3(aq) --> BaCO3(s) + 2KCl(aq)
c)
BaCl(aq) + K2CO3(aq) --> BaCO3(s) + K2Cl(aq)
d)
Ba2Cl2(aq) + KCO3(aq) --> Ba2CO3(s) + KCl2(aq)
33.

The symbol for a substance dissolved in solution is ______

a)

(s)

b)

(l)

c)

(aq)

d)

(g)

34.

What is the charge of Iron in this compound. (Hint: think swap drop method):

Fe3(PO4)2

a)

3+

b)

2+

c)

1+

d)

6+

35.
How do the following two elements bond together?
Na1+  F1-         
a)
NaF
b)
NaF3
c)
Na3F
d)
Na1F2
36.
How do the following two elements bond together?
Cr3+  O2-         
a)
CrO
b)
Cr3O2
c)
Cr2O3
d)
CrO3
37.
How do the following two elements bond together?
K1+  S2- 
a)
KS
b)
K8S
c)
K6S3
d)
K2S
38.

Which of the following is the correct notation for the ionic compound of NO3- and Li+?

a)

NO3Li

b)

LiNO3

c)

Li+1NO3-

d)

NLiO3

39.

which factor that affect reaction rate is represented?

a)

Temperature

b)

Catalyst

c)

Surface Area

d)

Concentration

40.

Indicate whether each of the following will: Increase / Decrease / have No effect on the rate of reaction.

 

                Increasing temperature

              

a)

Increase

b)

Decrease

c)

No Effect

41.

Indicate whether each of the following will: Increase / Decrease / have No effect on the rate of reaction.

 

                Decrease Reactant Concentration             

a)

Increase

b)

Decrease

c)

No Effect

42.
A substance that increases speed of chemical reaction without being being changed is called:
a)
Catalyst
b)
Acid
c)
Base
d)
pressure
43.
This slows down or even stops a chemical reaction.
a)
de-activator
b)
catalyst
c)
enzyme
d)
inhibitor
44.

Which factors affect the rate of a reaction?

a)

temperature

b)

concentration

c)

surface area

d)

pressure

e)

catalyst

45.

Why does a higher concentration increase the rate of reaction?

a)

it increases the amount of reactants

b)

it lowers the activation energy

c)

it increases the energy of particle collisions

d)

it increases the frequency of particle collisions

46.
Increase in temperature of the reactants can do one of the following
a)
Slow collision frequency
b)
Allow less effective collision between the particles
c)
Cause particles to lose speed
d)
Increase collision between the particles thus increasing the rate.
47.

Grains of sugar have a greater _______ than a solid cube of

sugar of the same mass, and therefore will dissolve quicker in water.

a)

Surface Area

b)

Catalyst

c)

Temperature

d)

Concentratrion

48.

Which of the following will lower the rate

of reaction?

a)

adding an enzyme to the reaction

b)

decreasing the temperature from 40°C to

10°C

c)

breaking a chunk of calcium up into

smaller pieces

d)

increasing the amount of solute

dissolved in a solution

49.

In a chemical reaction, how quickly or slowly reactants turn

into products is called the

a)

Catalyst

b)

Reaction Rate

c)

Concentration

d)

Temperature

50.

In the image, which of the following is a catalyst?

a)

A

b)

B

c)

C

d)

D

51.

In the image, which of the following is an inhibitor?

a)

A

b)

B

c)

C

d)

D

52.

In the image, which of the following are reactants?

a)

A

b)

B

c)

C

d)

D

53.

Which of the following factors affecting reaction rate is described in the image?

a)

Temperature

b)

Concentration

c)

Agitation

d)

Surface Area

54.

Which of the following factors affecting reaction rate is displayed in the image?

a)

Concentration

b)

Pressure

c)

Inhibitor

d)

Surface Area

55.

Which of the following factors affecting reaction rate is displayed in the image?

a)

Agitation

b)

Temperature

c)

Inhibitor

d)

Surface Area

56.

What does the arrow in a chemical equation represent?

a)

created

b)

makes

c)

yields

d)

destroys

57.

Indicates heat was supplied to the reaction.

a)

b)

c)

d)

58.

Indicates the use of the catalyst.

a)

b)

c)

d)

59.

Indicates a reversible reaction.

a)

b)

c)

d)

60.

a)

yields

b)

solid

c)

aqueous

d)

catalyst

61.
Which statement is true?
a)
Acids start with H and bases end with OH
b)
Acids start with OH and bases end with H
c)
Acids end with H and bases start with OH
d)
Acids end with OH and bases start with H
62.

Which word equation represents a neutralization reaction?

a)

base + acid → salt + water

b)

base + salt → water + acid

c)

salt + acid → base + water

d)

salt + water → acid + base

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