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RATE OF REACTION

Total questions: 199

Worksheet time: 3hrs 25mins

Name
Class
Date
1.

Increase in temperature causes the particles to

a)

slow down

b)

move faster

c)

stay apart from each other

d)

move in the correct order

2.

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 reactant particles

d)

it increases the frequency of collision

3.

Why does a higher temperature increase the rate of a reaction?

a)

It increases both the frequency collision and energy of reactant particles

b)

It only increases the frequency of collision

c)

It only increases the energy of reactant particles

d)

It reduces the activation energy of the reaction

4.
What is the rate of reaction?
a)
How fast a reaction is 
b)
How big a reaction is
c)
How loud a reaction is
d)
How much gas a reaction produces
5.

Grinding an effervescent tablet into powder increases the rate of reaction due to increase of

a)

concentration

b)

total surface area

c)

temperature

d)

size

6.

Which factors increase the rate of a reaction?

a)

increasing temperature

b)

increasing concentration

c)

increasing total surface area

d)

All of these

7.

Increasing pressure causes the reacting particles

a)

to bond together

b)

to repel from each other

c)

gain more kinetic energy

d)

to move closer together

8.

Increasing the temperature gives particles more __________.

a)

time

b)

energy

c)

space

d)

frequency

9.

As the frequency of ________________ collision increases, the rate of reaction increases.

a)

time

b)

speed

c)

effective

d)

efficient

10.

You add more bodies into a "mosh pit" to hope for more collisions. You have increased

a)

temperature

b)

concentration

c)

pressure

d)

catalyst

11.

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 collisions

12.
the starting materials in a chemical reaction
a)
Products
b)
Reactants
c)
Starters
d)
Enders
13.
a substance that is formed as the result of a chemical reaction
a)
Product 
b)
Reactant
c)
Starters
d)
Enders
14.

Which one shows that a chemical reaction has occurred?

a)

dissolving

b)

melting

c)

formation of a gas

d)

bending

15.
a copper penny turning greenish after a few years.
a)
Chemical Change
b)
Physical Change
16.
Which of the following IS a clue that a chemical change has occurred? 
a)
State of matter change
b)
Size Change
c)
Change in temperature
d)
Shape change
17.

Hard-boiled eggs are the a result of a chemical change because

a)

the eggs are the same size before vs after.

b)

the eggs have different properties (smell, taste, color) before vs after.

c)

the eggs weigh the same before vs after.

d)

the eggs went through a phase change.

18.

On a camping trip, Mr. Markowitz roasts a marshmallow in the campfire. He notices that the roasted marshmallow smells and tastes differently than the uncooked marshmallows. What change has taken place AND how does Mr. Markowitz know?

a)

A chemical change because the marshmallow changed in taste, color, and smell

b)

A chemical change because the marshmallow was heated up.

c)

Only a physical change because the marshmallow changed in size

d)

No change because the marshmallow is not a new substance

19.

Which of the following is a clue that a chemical change has occurred? (Choose all correct answers.)

a)

Formation of a gas (bubbles)

b)

Color change

c)

Phase change

d)

Produces light or heat

20.
Which of the following is NOT an example of a physical change?
a)
crumpled paper
b)
pencil sharpening
c)
shrunken clothing
d)
rust
21.

Which of these is NOT a chemical reaction?

a)

Single displacement

b)

Synthesis

c)

Decomposition

d)

Stratification

22.

Increase in temperature causes the particles to

a)

slow down

b)

move faster

c)

stay apart from each other

d)

move in the correct order

23.

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 reactant particles

d)

it increases the frequency of collision

24.

Why does a higher temperature increase the rate of a reaction?

a)

It increases both the frequency collision and energy of reactant particles

b)

It only increases the frequency of collision

c)

It only increases the energy of reactant particles

d)

It reduces the activation energy of the reaction

25.
What is the rate of reaction?
a)
How fast a reaction is 
b)
How big a reaction is
c)
How loud a reaction is
d)
How much gas a reaction produces
26.

Grinding an effervescent tablet into powder increases the rate of reaction due to increase of

a)

concentration

b)

total surface area

c)

temperature

d)

size

27.

Which factors increase the rate of a reaction?

a)

increasing temperature

b)

increasing concentration

c)

increasing total surface area

d)

All of these

28.

Increasing pressure causes the reacting particles

a)

to bond together

b)

to repel from each other

c)

gain more kinetic energy

d)

to move closer together

29.

Increasing the temperature gives particles more __________.

a)

time

b)

energy

c)

space

d)

frequency

30.

As the frequency of ________________ collision increases, the rate of reaction increases.

a)

time

b)

speed

c)

effective

d)

efficient

31.

You add more bodies into a "mosh pit" to hope for more collisions. You have increased

a)

temperature

b)

concentration

c)

pressure

d)

catalyst

32.

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 collisions

33.
the starting materials in a chemical reaction
a)
Products
b)
Reactants
c)
Starters
d)
Enders
34.
a substance that is formed as the result of a chemical reaction
a)
Product 
b)
Reactant
c)
Starters
d)
Enders
35.

Which one shows that a chemical reaction has occurred?

a)

dissolving

b)

melting

c)

formation of a gas

d)

bending

36.
a copper penny turning greenish after a few years.
a)
Chemical Change
b)
Physical Change
37.
Which of the following IS a clue that a chemical change has occurred? 
a)
State of matter change
b)
Size Change
c)
Change in temperature
d)
Shape change
38.

Hard-boiled eggs are the a result of a chemical change because

a)

the eggs are the same size before vs after.

b)

the eggs have different properties (smell, taste, color) before vs after.

c)

the eggs weigh the same before vs after.

d)

the eggs went through a phase change.

39.

On a camping trip, Mr. Markowitz roasts a marshmallow in the campfire. He notices that the roasted marshmallow smells and tastes differently than the uncooked marshmallows. What change has taken place AND how does Mr. Markowitz know?

a)

A chemical change because the marshmallow changed in taste, color, and smell

b)

A chemical change because the marshmallow was heated up.

c)

Only a physical change because the marshmallow changed in size

d)

No change because the marshmallow is not a new substance

40.

Which of the following is a clue that a chemical change has occurred? (Choose all correct answers.)

a)

Formation of a gas (bubbles)

b)

Color change

c)

Phase change

d)

Produces light or heat

41.
Which of the following is NOT an example of a physical change?
a)
crumpled paper
b)
pencil sharpening
c)
shrunken clothing
d)
rust
42.

Which of these is NOT a chemical reaction?

a)

Single displacement

b)

Synthesis

c)

Decomposition

d)

Stratification

43.

To calculate rate of a reaction: change in quantity of substance ÷\div  ____ taken

a)

time

b)

mass

c)

volume

d)

concentration

44.

Choose the unit of rate.

a)

s

b)

g/s

c)

s/g

d)

g

45.

In order to react particles must _______ with sufficient energy.

a)

pass

b)

bounce

c)

meet

d)

collide

46.

The minimum energy required for particles to react when they collide is the __________ energy.

a)

physical

b)

activation

c)

minimum

d)

collision

47.

What happens to particles when their temperature increases?

a)

move slower

b)

move at the same speed

c)

move faster

48.

Why does increasing temperature cause the rate of a reaction to increase? [Choose 2]

a)

Particles move faster

b)

Particles move slower

c)

Particles collide with less energy

d)

Particles collide with more energy

49.

Which piece of marble has the highest surface area - assuming they all have the same volume?

a)

A single piece

b)

powder

c)

chips

50.

Increasing the surface area of solid reactants increases the rate of reaction as more particles are _______ so more collisions can take place per second.

a)

second

b)

exposed

c)

open

d)

closer together

51.

Increasing the surface area of solid reactants increases the rate of reaction as more particles are exposed so more collisions can take place per ______.

a)

second

b)

exposed

c)

time

d)

collision

52.

How does increasing concentration change the arrangement of particles?

a)

Particles move faster

b)

Particles are further apart

c)

Particles move slower

d)

Particles are closer together

53.

How does increasing pressure change the arrangement of particles?

a)

Particles move faster

b)

Particles are further apart

c)

Particles move slower

d)

Particles are closer together

54.

When particles are closer together (by increasing concentration of aqueous solutions and increasing pressure of gases) why does rate of reaction increase?

a)

More collisions take place

b)

More collisions take place per second

c)

The particles have more energy

d)

The particles move faster

55.

What is a catalyst?

a)

A substance that lowers activation energy by providing an alternative pathway for the reaction.

b)

A substance that increases activation energy by providing an alternative pathway for the reaction.

c)

A substance that lowers activation energy by providing an output for the reaction.

56.

To calculate rate of a reaction: change in quantity of substance ÷\div  ____ taken

a)

time

b)

mass

c)

volume

d)

concentration

57.

Choose the unit of rate.

a)

s

b)

g/s

c)

s/g

d)

g

58.

In order to react particles must _______ with sufficient energy.

a)

pass

b)

bounce

c)

meet

d)

collide

59.

The minimum energy required for particles to react when they collide is the __________ energy.

a)

physical

b)

activation

c)

minimum

d)

collision

60.

What happens to particles when their temperature increases?

a)

move slower

b)

move at the same speed

c)

move faster

61.

Why does increasing temperature cause the rate of a reaction to increase? [Choose 2]

a)

Particles move faster

b)

Particles move slower

c)

Particles collide with less energy

d)

Particles collide with more energy

62.

Which piece of marble has the highest surface area - assuming they all have the same volume?

a)

A single piece

b)

powder

c)

chips

63.

Increasing the surface area of solid reactants increases the rate of reaction as more particles are _______ so more collisions can take place per second.

a)

second

b)

exposed

c)

open

d)

closer together

64.

Increasing the surface area of solid reactants increases the rate of reaction as more particles are exposed so more collisions can take place per ______.

a)

second

b)

exposed

c)

time

d)

collision

65.

How does increasing concentration change the arrangement of particles?

a)

Particles move faster

b)

Particles are further apart

c)

Particles move slower

d)

Particles are closer together

66.

How does increasing pressure change the arrangement of particles?

a)

Particles move faster

b)

Particles are further apart

c)

Particles move slower

d)

Particles are closer together

67.

When particles are closer together (by increasing concentration of aqueous solutions and increasing pressure of gases) why does rate of reaction increase?

a)

More collisions take place

b)

More collisions take place per second

c)

The particles have more energy

d)

The particles move faster

68.

What is a catalyst?

a)

A substance that lowers activation energy by providing an alternative pathway for the reaction.

b)

A substance that increases activation energy by providing an alternative pathway for the reaction.

c)

A substance that lowers activation energy by providing an output for the reaction.

69.
The rate of a reaction increases as temperature__________________.
a)
Decreases
b)
Increases
c)
Stays the Same
70.
A ______________ is a substance that increases the rate of a reaction without being used up during the reaction. 
a)
catalyst
b)
product
c)
reactant
d)
solute
71.
Catalysts permit reactions to proceed along a ___________energy path.
a)
lower
b)
higher
72.
Smaller particle size allows for a _________ surface area to be exposed for the reaction.
a)
larger
b)
smaller
73.
Increasing the temperature will increase the kinetic energy of particles, therefore increasing the collisions between particles.
a)
false
b)
true
74.
Increasing the concentration of the reactants will slow down the reaction.
a)
false 
b)
true
75.
Products will form faster if____________
a)
the particle size of the reactants are larger.
b)
temperature is decreased.
c)
concentration of the reactants are increased.
d)
the reaction is not stirred.
76.
A catalyst works by
a)
changing the order of the reaction
b)
increasing the temperature
c)
lowering the activation energy
d)
making the activated complex
77.
The rate of a chemical reaction is NOT affected by which of the following:
a)
temperature
b)
concentration
c)
particle size (surface area)
d)
All of these affect reaction rates
78.
Usually lowering the temperature will slow down a reaction.
a)
false
b)
true
79.

Which of the following increase the reaction rate?

a)

less surface area

b)

lower temperature

c)

increasing pressure

d)

low concentration

80.

Which of the following are the factors that affecting the rate of reactions?

a)

Size of reactants

b)

Concentration of reactants

c)

Temperature

d)

Presence of catalyst

e)

All of above

81.

Which factor can only affects the rate of reaction when involved gases as the reactant?

a)

Concentration of reactants

b)

Pressure

c)

Temperature

d)

Size of reactants

82.

Which of the following statement is correct?

a)

Smaller size of reactants, smaller total surface area, higher reaction rate

b)

Larger size of reactants, smaller total surface area, higher reaction rate

c)

Smaller size of reactants, larger total surface area, higher reaction rate

d)

Larger size of reactants, larger total surface area, higher reaction rate

83.

_____________ concentration of reactants by adding solute; ______________ concentration of reactants by adding solvent.

a)

Increase; Increase

b)

Decrease; Decrease

c)

Increase; Decrease

d)

Decrease; Increase

84.

Does the presence of catalyst will change the amount of product?

a)

Yes

b)

No

85.

If the temperature is reduced, a reaction rate will ______

a)

increase

b)

decrease

c)

stay the same

86.

How does temperature increase the rate of a chemical reaction?

a)

Provides lower energy route for the reaction so that a greater number of particles have enough energy to react.

b)

Increased number of collisions increases the chance of a 'successful collision'

c)

Particles collide faster and harder so a larger proportion have greater energy than the required activation energy.

d)

Greater number of 'active sites' available for a reaction to take place (referring to solids)

87.

How does concentration increase the rate of a chemical reaction?

a)

Provides lower energy route for the reaction so that a greater number of particles have enough energy to react.

b)

Increased number of collisions increases the chance of a 'successful collision'

c)

Particles collide faster and harder so a lagrer proportion have greater energy than the required activation energy.

d)

Greater number of 'active sites' available for a reaction to take place (referring to solids)

88.

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

89.
The rate of a reaction increases as temperature__________________.
a)
Decreases
b)
Increases
c)
Stays the Same
90.
A ______________ is a substance that increases the rate of a reaction without being used up during the reaction. 
a)
catalyst
b)
product
c)
reactant
d)
solute
91.
Catalysts permit reactions to proceed along a ___________energy path.
a)
lower
b)
higher
92.
Smaller particle size allows for a _________ surface area to be exposed for the reaction.
a)
larger
b)
smaller
93.
Increasing the temperature will increase the kinetic energy of particles, therefore increasing the collisions between particles.
a)
false
b)
true
94.
Increasing the concentration of the reactants will slow down the reaction.
a)
false 
b)
true
95.
Products will form faster if____________
a)
the particle size of the reactants are larger.
b)
temperature is decreased.
c)
concentration of the reactants are increased.
d)
the reaction is not stirred.
96.
A catalyst works by
a)
changing the order of the reaction
b)
increasing the temperature
c)
lowering the activation energy
d)
making the activated complex
97.
The rate of a chemical reaction is NOT affected by which of the following:
a)
temperature
b)
concentration
c)
particle size (surface area)
d)
All of these affect reaction rates
98.
Usually lowering the temperature will slow down a reaction.
a)
false
b)
true
99.

Which of the following increase the reaction rate?

a)

less surface area

b)

lower temperature

c)

increasing pressure

d)

low concentration

100.

Which of the following are the factors that affecting the rate of reactions?

a)

Size of reactants

b)

Concentration of reactants

c)

Temperature

d)

Presence of catalyst

e)

All of above

101.

Which factor can only affects the rate of reaction when involved gases as the reactant?

a)

Concentration of reactants

b)

Pressure

c)

Temperature

d)

Size of reactants

102.

Which of the following statement is correct?

a)

Smaller size of reactants, smaller total surface area, higher reaction rate

b)

Larger size of reactants, smaller total surface area, higher reaction rate

c)

Smaller size of reactants, larger total surface area, higher reaction rate

d)

Larger size of reactants, larger total surface area, higher reaction rate

103.

_____________ concentration of reactants by adding solute; ______________ concentration of reactants by adding solvent.

a)

Increase; Increase

b)

Decrease; Decrease

c)

Increase; Decrease

d)

Decrease; Increase

104.

Does the presence of catalyst will change the amount of product?

a)

Yes

b)

No

105.

If the temperature is reduced, a reaction rate will ______

a)

increase

b)

decrease

c)

stay the same

106.

How does temperature increase the rate of a chemical reaction?

a)

Provides lower energy route for the reaction so that a greater number of particles have enough energy to react.

b)

Increased number of collisions increases the chance of a 'successful collision'

c)

Particles collide faster and harder so a larger proportion have greater energy than the required activation energy.

d)

Greater number of 'active sites' available for a reaction to take place (referring to solids)

107.

How does concentration increase the rate of a chemical reaction?

a)

Provides lower energy route for the reaction so that a greater number of particles have enough energy to react.

b)

Increased number of collisions increases the chance of a 'successful collision'

c)

Particles collide faster and harder so a lagrer proportion have greater energy than the required activation energy.

d)

Greater number of 'active sites' available for a reaction to take place (referring to solids)

108.

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

109.

what is the collision theory?

a)

chemical reactions can only take place when the reacting particles collide with each other. the collisions must not have sufficient energy.

b)

the speed at which a chemical reaction takes place this is defined as proportional to increase in concentration

c)

physical reactions can only take place when the reacting particles collide with each other. the collisions must have sufficient energy.

d)

chemical reactions can only take place when the reacting particles collide with each other. the collisions must have sufficient energy.

110.

The higher the concentration, the more _______ in a given volume

a)

solvent only

b)

particles only

c)

molecules only

d)

all of the above

111.

The _____ of a chemical reaction _____when the_____ of one or more of the reactants increases

a)

rate, increases, concentration

b)

particles, increases, concentration

c)

rate, decreases, concentration

d)

particles, decreases, concentration

112.

the more particles, the higher the _____-

a)

collisions

b)

frequency of collisions

c)

activation energy

d)

temperature

113.

the higher the frequency of collisions, the higher the ____

a)

chance of collision

b)

chance of unsuccessful collisions

c)

chance of successful collisions

d)

chance of energetic collisions

114.

if the concentration of reactants is increased, there are more reactant particles moving together.

a)

true

b)

false

115.

concentration is not from the factors that affect the rate of reaction.

a)

true

b)

false

116.

decreasing the concentration of a reactant in a solution, will decrease the rate of a reaction

a)

true

b)

false

117.

what is the collision theory?

a)

chemical reactions can only take place when the reacting particles collide with each other. the collisions must not have sufficient energy.

b)

the speed at which a chemical reaction takes place this is defined as proportional to increase in concentration

c)

physical reactions can only take place when the reacting particles collide with each other. the collisions must have sufficient energy.

d)

chemical reactions can only take place when the reacting particles collide with each other. the collisions must have sufficient energy.

118.

The higher the concentration, the more _______ in a given volume

a)

solvent only

b)

particles only

c)

molecules only

d)

all of the above

119.

The _____ of a chemical reaction _____when the_____ of one or more of the reactants increases

a)

rate, increases, concentration

b)

particles, increases, concentration

c)

rate, decreases, concentration

d)

particles, decreases, concentration

120.

the more particles, the higher the _____-

a)

collisions

b)

frequency of collisions

c)

activation energy

d)

temperature

121.

the higher the frequency of collisions, the higher the ____

a)

chance of collision

b)

chance of unsuccessful collisions

c)

chance of successful collisions

d)

chance of energetic collisions

122.

if the concentration of reactants is increased, there are more reactant particles moving together.

a)

true

b)

false

123.

concentration is not from the factors that affect the rate of reaction.

a)

true

b)

false

124.

decreasing the concentration of a reactant in a solution, will decrease the rate of a reaction

a)

true

b)

false

125.
What is the rate of reaction?
a)
How fast a reaction is 
b)
How big a reaction is
c)
How loud a reaction is
d)
How much gas a reaction produces
126.
Grinding a seltzer tablet into powder increases the rate of reaction due to increased
a)
concentration
b)
surface area
c)
temperature
d)
reactants
127.
The rate of a chemical reaction is NOT affected by which of the following:
a)
temperature
b)
concentration
c)
particle size (surface area)
d)
All of these affect reaction rates
128.
Products will form faster if____________
a)
the particle size of the reactants are larger.
b)
temperature is decreased.
c)
concentration of the reactants are increased.
d)
the reaction is not stirred.
129.
A ______________ is a substance that increases the rate of a reaction without being used up during the reaction. 
a)
catalyst
b)
product
c)
reactant
d)
solute
130.

Adding a catalyst ___________ the activation energy.

a)

Raises

b)

Lowers

c)

Doesn't affect

d)

Inreases

131.

The minimum amount of energy needed for colliding particles to react is called

a)

Chemical Energy

b)

Kinetic Energy

c)

Activation Energy

d)

Potential Energy

132.

Which graph shows the effect of increasing temperature on the rate of reaction of calcium carbonate with dilute hydrochloric acid?

a)
b)
c)
d)
133.
Why does a catalyst increase the rate of reaction?
a)
it produces extra energy for the reactants
b)
it increases the speed of the reactant particles
c)
it increases the frequency of particle collisions
d)
it reduces the activation energy of the reaction 
134.

How could we make this reaction happen more quickly?

a)

Decrease the concentration of the acid

b)

crush the chalk to increase the surface area

c)

Put the test tube in an ice bath

135.

The major theory of reaction rate is called

a)

Collision theory

b)

Crash theory

c)

Newton's laws

d)

Thermodynamics

136.
What makes an effective collision?
a)
When molecules collide.
b)
When molecules collide with the proper orientation.
c)
When molecules collide with proper orientation and enough kinetic energy.
d)
High Temperature.
137.
The rate of a reaction increases as temperature__________________.
a)
Decreases
b)
Increases
c)
Stays the Same
138.
A ______________ is a substance that increases the rate of a reaction without being used up during the reaction. 
a)
catalyst
b)
product
c)
reactant
d)
solute
139.
Smaller particle size allows for a _________ surface area to be exposed for the reaction.
a)
larger
b)
smaller
140.
Increasing the temperature will increase the kinetic energy of particles, therefore increasing the collisions between particles.
a)
false
b)
true
141.
Exothermic reactions release heat to the surroundings.
a)
true
b)
false
142.
What type of reaction is this?
a)
Endothermic
b)
Exothermic
143.

What type of reaction is this?

a)

Endothermic

b)

Exothermic

144.

A chemical reaction in which energy is absorbed is ______________.

a)

an endothermic reaction

b)

an exothermic reaction

c)

a single replacement reaction

d)

a double replacement reaction

145.

List four factors that affects the rate of a reaction

a)

temperature

b)

concentration

c)

surface area

d)

volume

e)

catalysts

146.

How does a catalyst work in speeding up a reaction?

a)

By lowering the activation energy or reaction

b)

by giving them more energy

c)

by making them more available

147.

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

148.

Why does a higher temperature increase the rate of a reaction?

a)

it increases both the frequency and energy of particle collisions

b)

it only increases the frequency of particle collisions

c)

it only increases the energy of particle collisions

d)

it reduces the activation energy of the reaction

149.

what factors can affect the value of the activation energy of a reaction?

a)

The presence of a catalyst

b)

changes in temperature

c)

changes in concentration of the reactants

d)

changes in pressure

150.
Catalysts are thought to increase the rate of a chemical reaction by
a)
supplying the energy needed to overcome the activation energy
b)
increasing the temperature of the reaction
c)
providing less surface area for the reaction
d)
providing an alternative reaction pathway with a lower activation energy
151.
Increasing the temperature of a chemical reaction
a)
lowers the activation energy of the reaction
b)
increases the energy of the reactant particles only
c)
increases the value of ΔH for the reaction
d)
increases the energy of the reactant and product particles
152.
What is the rate of reaction?
a)
How fast a reaction is 
b)
How big a reaction is
c)
How loud a reaction is
d)
How much gas a reaction produces
153.

Grinding a effervescent tablet into powder increases the rate of reaction due to increased

a)

concentration

b)

surface area

c)

temperature

d)

reactants

154.

The ______________is required to break the bonds of the reactants.

a)

Carbonic energy

b)

Activation energy

c)

Plutonic energy

d)

Energi Gaib

155.
The rate of a reaction increases as temperature__________________.
a)
Decreases
b)
Increases
c)
Stays the Same
156.
Smaller particle size allows for a _________ surface area to be exposed for the reaction.
a)
larger
b)
smaller
157.
Exothermic reactions release heat to the surroundings.
a)
true
b)
false
158.
What type of reaction is this?
a)
Endothermic
b)
Exothermic
159.

What type of reaction is this?

a)

Endothermic

b)

Exothermic

160.

A chemical reaction in which energy is absorbed is ______________.

a)

an endothermic reaction

b)

an exothermic reaction

c)

a single replacement reaction

d)

a double replacement reaction

161.

Table 4 shows the total volume of gas evolved at different intervals for the dissociation of hydrogen peroxide.


What is the average rate of reaction in the second minute?

a)

14.0 cm3 min-1

b)

16.0 cm3 min-1

c)

18.0 cm3 min-1

d)

28.0 cm3 min-1

162.

When we investigate the rate of reaction we are looking at the...

a)

amount of product formed

b)

speed of reaction

c)

concentration of reacting particles

d)

combining reactants with products

163.
The rate of a chemical reaction is NOT affected by which of the following:
a)
temperature
b)
concentration
c)
particle size (surface area)
d)
All of these affect reaction rates
164.
Increasing the temperature will increase the kinetic energy of particles, therefore increasing the collisions between particles.
a)
false
b)
true
165.
A reaction has the rate law: Rate = k [A][B].
What is the overall order of reaction?
a)
1st
b)
2nd
c)
3rd
d)
4th
166.
A possible rate law for a third overall order of a reaction is __________________
a)
Rate = k [A]2[B]2
b)
Rate = k [A][B]3
c)
Rate = k [A]3 [B]
d)
Rate = k [A]2[B]
167.
A reaction has the rate law: Rate = k [A][B].
What will happen to the rate of reaction if the concentration of A is doubled and the concentration of B is tripled?
a)
increases by a factor of 3
b)
increases by a factor of 4
c)
increases by a factor of 5
d)
increases by a factor of 6
168.

Reaction order defines...

a)

how many reactions a reactant can do

b)

how the rate is affected by the concentration of that reactant

c)

the weight of reactants of a chemical reaction

d)

the order in which the reactants line-up to react and form products

169.

What is the letter used to represent the Specific rate constant?

a)

t

b)

p

c)

k

d)

l

170.

To find the reaction order of a reactant we...

a)

look at the superscript number

b)

look at the big numbers

c)

add all the subscripts up together

171.

How do we find the overall order of a chemical reaction?

a)

Add all the reaction orders of each reactant

b)

Subtract all the reaction orders of each reactant

c)

Multiplyall the reaction orders of each reactant

d)

We need to find moles, add them all together and multiply by 100

172.

If the concentration of [A] is doubled, and the rate of the reaction also doubles. What reaction order is [A]?

a)

Zero-order

b)

First-order

c)

Second-order

d)

Triple-order

173.

Look at the rate equation: Rate=k[H2O][HCl]


What is the overall order of the reaction?

a)

first-order

b)

second-order

c)

third-order

d)

fourth-order

174.
What is the activation energy?
a)
The energy of the products
b)
The energy of the reactants
c)
The minimum energy needed by the reactants to form the products.
d)
The energy lost in the reaction
175.
According to collision theory, what must the reactants have in order to form products?
a)
The right size
b)
The right shape
c)
Enough energy
d)
Nothing
176.
Products will form faster if____________
a)
the particle size of the reactants are larger.
b)
temperature is decreased.
c)
concentration of the reactants are increased.
d)
the reaction is not stirred.
177.

How does a catalyst work in speeding up a reaction?

a)

By lowering the activation energy or reaction

b)

by giving them more energy

c)

by making them more available

178.

The minimum amount of energy needed for colliding particles to react is called the

a)

Chemical Energy

b)

Kinetic Energy

c)

Activation Energy

d)

Potential Energy

179.

A substance that increases the rate of a reaction without being used up during the reaction is called a

a)

catalyst

b)

product

c)

reactant

d)

solute

180.
Catalysts permit reactions to proceed along a ___________energy path.
a)
lower
b)
higher
181.
A catalyst increases the efficiency of collisions between reactants.
a)
true
b)
false
182.

What is the name given to a catalyst in the human body?

a)

Biology

b)

Catalyst

c)

Chemical

d)

Enzyme

183.

Which of the reaction pathway shows the catalysed reaction?

a)

1

b)

2

184.

When a catalyst is added to a reaction the rate of reaction,,,

a)

Increases

b)

Decreases

c)

Does not change

185.

How does a catalyst work in speeding up a reaction?

a)

By lowering the activation energy or reaction

b)

by making them more available

c)

by giving them more energy

186.

A catalyst increases the efficiency of collisions between reactants.

a)

true

b)

false

187.

A catalyst

a)

is used up

b)

is nevr used up

188.

A catalyst be regenerated or used again and again

a)

False

b)

True

189.

A catalyst changes the mechanism of the reaction

a)

True

b)

False

190.

What has to happen before a reaction takes place?

a)

Product molecules must collide

b)

Product molecules must collide with enough power

c)

Reacting molecules must collide with enough energy

d)

Molecules must collide with enough power

191.

Explain how increasing concentrations increases the rate of a reaction

a)

Less collisions occur

b)

More movement

c)

More collisions occur

d)

Less movement

192.

What change in condition increases the speed of the reacting molecules?

a)

Decreasing temperature

b)

Increasing temperature

c)

Decreasing energy

d)

Increasing power

193.

How can you increase the surface area of a solid?

a)

Divide the solid into smaller pieces

b)

Get more solid

c)

Turn it into a gas

194.

Which change in condition only affects reactions involving gases?

a)

Temperature

b)

Surface area

c)

Pressure

d)

Concentration

195.

What is the activation energy in a reaction?

a)

The energy needed for products to be formed

b)

The energy needed to break products into reactants

c)

The minimum energy needed to make products

d)

The minimum energy needed by reactants for them to react

196.

What does a catalyst do?

a)

Speeds up reactants

b)

Speeds up a chemical reaction

c)

Speeds up products

d)

Speeds up particles

197.

What do you call a biological catalyst?

a)

Product

b)

Reactant

c)

Biological reaction

d)

Enzyme

198.

What is/are the catalyst(s) in catalytic converters in cars?

a)

Platinum

b)

Phosphorous

c)

Palladium

d)

Phosphorous and platinum

e)

Platinum and palladium

199.

The graph that shows how catalysts lower activation energy is known as what?

a)

Reaction profile

b)

Energy graph

c)

Catalysing reaction graph

d)

Overall change of energy grapg

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