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unit 5 and unit 6

Total questions: 115

Worksheet time: 2hrs 34mins

Name
Class
Date
1.

What do you increase when you crush an alka seltzer tablet?

a)

Surface area

b)

temperature

c)

concentration

d)

pressure

2.

Which graph shows the highest reaction rate?

a)

a

b)

b

c)

c

d)

d

3.

Increasing temperature has what effect on reaction rate?

a)

No effect

b)

Increasing temperature lowers reaction rate

c)

Increasing temperature increases reaction rate

d)

What are you talking about?

4.

Collision theory states that....

a)

reaction rate increases when particles collide more

b)

reaction rate is not affected by collisions

c)

reaction rate increases as there are fewer collisions

d)

there is no relationship between collisions and reaction rate.

5.

Adding more baking soda increases its....

a)

concentration

b)

surface area

c)

pressure

d)

temperature

6.

How does temperature affect reaction rate?

a)

Increasing temperature= more collisions= increased reaction rate

b)

Decreasing temperature= fewer collisions= increased reaction rate

c)

Temperature has no effect on reaction rate.

d)

Decreasing temperature= more collisions= increased reaction rate

7.

What do you call a chemical that brings particles together so that they can react, but doesn't participate in the reaction itself?

a)

Catalyst

b)

Reactant

c)

Product

d)

Surface area

8.

Which group of particles shows that increasing surface area increases collisions among particles?

a)

Left side

b)

Right side

c)

Cannot be determined by either picture

9.

What effect does increasing surface area have on reaction rate?

a)

Reaction rate increases.

b)

Reaction rate remains the same.

c)

Reaction rate decreases.

10.

Which of the following affect reaction rate? Choose all that apply.

a)

surface area

b)

temperature

c)

products

d)

concentration

11.
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
12.
The rate of a reaction increases as temperature__________________.
a)
Decreases
b)
Increases
c)
Stays the Same
13.
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
14.
Smaller particle size allows for a _________ surface area to be exposed for the reaction.
a)
larger
b)
smaller
15.
Increasing the concentration of the reactants will slow down the reaction.
a)
false 
b)
true
16.
Exothermic reactions release heat to the surroundings.
a)
true
b)
false
17.

The ____________ states that atoms, ions, or molecules must collide in order to react.

a)

transition state

b)

activation energy

c)

rate law

d)

collision theory

18.
The rate of a reaction increases as temperature__________________.
a)
Decreases
b)
Increases
c)
Stays the Same
19.
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
20.
The ___________ the surface area of the reactants, the faster the reaction rate.
a)
larger 
b)
smaller
21.
The rate of a reaction increases as temperature__________________.
a)
Decreases
b)
Increases
c)
Stays the Same
22.
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
23.
Catalysts permit reactions to proceed along a ___________energy path.
a)
lower
b)
higher
24.
Smaller particle size allows for a _________ surface area to be exposed for the reaction.
a)
larger
b)
smaller
25.
Increasing the temperature will increase the kinetic energy of particles, therefore increasing the collisions between particles.
a)
false
b)
true
26.
Increasing the concentration of the reactants will slow down the reaction.
a)
false 
b)
true
27.
Exothermic reactions release heat to the surroundings.
a)
true
b)
false
28.

The ____________ states that atoms, ions, or molecules must collide in order to react.

a)

transition state

b)

activation energy

c)

rate law

d)

collision theory

29.
The rate of a reaction increases as temperature__________________.
a)
Decreases
b)
Increases
c)
Stays the Same
30.
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
31.
The ___________ the surface area of the reactants, the faster the reaction rate.
a)
larger 
b)
smaller
32.

Is this equation endo- or exo-thermic?

PCl3 (s) + Cl2 (g) --> PCl5 (s) + energy

a)

endothermic

b)

exothermic

33.

Is this equation endo- or exo-thermic?

2KNO3 (s) + energy --> 2KNO2 (s) + O2

a)

endothermic

b)

exothermic

34.

When new chemical bonds form, energy ____________.

a)

is taken into the system.

b)

stays the same in the system.

c)

is released from the system.

35.

When the solids Ba(OH)2 and NH4SCN are mixed, a solution is produced, and the temperature drops. Which statement about the energetics of this reaction is correct?

a)

The reaction is endothermic and ΔH is negative.

b)

The reaction is exothermic and ΔH is negative.

c)

The reaction is endothermic and ΔH is positive.

d)

.The reaction is exothermic and ΔH is positive.

36.

Is this equation endo- or exo-thermic?

PCl3 (s) + Cl2 (g) --> PCl5 (s) + energy

a)

endothermic

b)

exothermic

37.

Which of the following is TRUE about the bond-breaking process of the reactants?

a)

It absorbs energy.

b)

There's no energy involved.

c)

It releases energy.

38.

What type of reaction is represented by the graph above?

a)

endothermic

b)

exothermic

39.

What type of reaction is represented by the graph above?

a)

endothermic

b)

exothermic

40.

The average bond enthalpies for O-O and O=O are 146 and 496 kJ/mol respectively. What is the enthalpy change, in kJ, for the reaction below?


H-O-O-H(g) → H-O-H(g) + ½O=O(g)

a)

-102 kJ

b)

- 350 kJ

c)

+102 kJ

d)

+350 kJ

41.
In an exothermic reaction, heat is ...
a)
taken in
b)
given out
42.

In an endothermic reaction, heat is ...

a)

taken in

b)

given out

43.

If a chemical reaction is EXOTHERMIC, the temperature of the surrounding would....

a)

Stay the same

b)

Increase

c)

Decrease

44.

In an endothermic reaction the reaction is releasing energy.

a)

True

b)

False

45.

Photosynthesis takes place inside of leaf cells. Sunlight is required. Is this an Exothermic or an Endothermic reaction?

a)

Endothermic

b)

Exothermic

46.

Baking bread and cooking an egg require an input of heat. These would be examples of....?

a)

Endothermic processes

b)

Exothermic processess

c)

None of these

47.
What type of reaction is shown in the photo?
a)
Exothermic
b)
Isothermic
c)
Endothermic
d)
None of the  above
48.

Which factors affect the rate of a reaction?

a)

temperature

b)

concentration

c)

surface area

d)

the size of a reaction container

e)

catalyst

49.

A temperature increase causes the particles to ......

a)

to slow down

b)

move faster

c)

collide higher

d)

in the right order

50.

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

51.

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

52.
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
53.

Breaking up a lump of potassium into smaller pieces increases the rate of reaction due to increased

a)

concentration

b)

surface area

c)

temperature

d)

reactants

54.

A temperature increase causes the particles ......

a)

to slow down

b)

move faster

c)

collide higher

d)

in the right order

55.

Which factors increase the rate of a reaction?

a)

increasing temperature

b)

increasing concentration

c)

increasing surface area

d)

All of these

56.

Decreasing the size of the reaction container means that particles are ___________ together.

a)

Happy

b)

Never

c)

Paired

d)

Closer

57.

As the frequency of ______________ increases, the rate of reaction increases.

Hint: frequency means how often

a)

Time

b)

Reactions

c)

Collisions

d)

Reactants

58.

As the ______________ of collision increases, the rate of reaction increases.

Hint: frequency means how often

a)

Time

b)

Speed

c)

Frequency

d)

Minutes

59.

Increasing the temperature, increases the _____ of reaction

a)

Catalyst

b)

Time

c)

Rate

d)

Weight

60.
Rate of chemical reaction means
a)
amount of product formed
b)
speed of reaction
c)
concentration of reacting particles
d)
combining reactants with products
61.

You add more people into an enclosed space in hope for more collisions. You have increased:

a)

temperature

b)

concentration

c)

pressure

d)

catalyst

62.

You make a space much smaller hoping to increase the reaction rates. Which one did you change?

a)

temperature

b)

concentration

c)

catalyst

d)

decreased the size of the reaction container

63.

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 reduces the energy of particle collisions

d)

it reduces the activation energy of the reaction

64.
Why does breaking up a solid reactant increase the rate of reaction?
a)
it creates more solid
b)
it creates more energy
c)
it increases the surface area
d)
it increases the concentration
65.
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
66.

This question is based on the video you watched:


Hiring a matchmaker is the same as

a)

increasing the temperature

b)

using a smaller container

c)

adding more reactants

d)

breaking up a lump of solid into smaller pieces

e)

adding a catalyst

67.

This question is based on the video you watched:


Shrinking the size of corridors in school is the same as

a)

increasing the temperature

b)

using a smaller container

c)

adding more reactants

d)

breaking up a lump of solid into smaller pieces

e)

adding a catalyst

68.

This question is based on the video you watched:


Cutting the time in between lesson by half (the students need to run faster to get to their lessons on time) is the same as

a)

increasing the temperature

b)

using a smaller container

c)

adding more reactants

d)

breaking up a lump of solid into smaller pieces

e)

adding a catalyst

69.

This question is based on the video you watched:


Not allowing students to travel in packs is the same as

a)

increasing the temperature

b)

using a smaller container

c)

adding more reactants

d)

breaking up a lump of solid into smaller pieces

e)

adding a catalyst

70.

This question is based on the video you watched:


Adding more students to the school is the same as

a)

increasing the temperature

b)

using a smaller container

c)

increasing concentration

d)

breaking up a lump of solid into smaller pieces

e)

adding a catalyst

71.

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

72.

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

73.

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

74.
Catalysts permit reactions to proceed along a ___________energy path.
a)
lower
b)
higher
75.
A catalyst increases the efficiency of collisions between reactants.
a)
true
b)
false
76.

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

a)

Biology

b)

Catalyst

c)

Chemical

d)

Enzyme

77.

Which of the reaction pathway shows the catalysed reaction?

a)

1

b)

2

78.

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

a)

Increases

b)

Decreases

c)

Does not change

79.

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

80.

A catalyst increases the efficiency of collisions between reactants.

a)

true

b)

false

81.

A catalyst

a)

is used up

b)

is nevr used up

82.

A catalyst be regenerated or used again and again

a)

False

b)

True

83.

A catalyst changes the mechanism of the reaction

a)

True

b)

False

84.

What do you increase when you crush an alka seltzer tablet?

a)

Surface area

b)

temperature

c)

concentration

d)

pressure

85.

Which graph shows the highest reaction rate?

a)

a

b)

b

c)

c

d)

d

86.

Increasing temperature has what effect on reaction rate?

a)

No effect

b)

Increasing temperature lowers reaction rate

c)

Increasing temperature increases reaction rate

d)

What are you talking about?

87.

In our experiments, what had the biggest effect on reaction rate?

a)

replacing water with vinegar

b)

crushing the alka seltzer

c)

adding extra baking soda

d)

adding a peppermint

88.

Collision theory states that....

a)

reaction rate increases when particles collide more

b)

reaction rate is not affected by collisions

c)

reaction rate increases as there are fewer collisions

d)

there is no relationship between collisions and reaction rate.

89.

The trister that ends today.

a)

1

b)

2

c)

3

d)

4

90.

Adding more baking soda increases its....

a)

concentration

b)

surface area

c)

pressure

d)

temperature

91.

How does temperature affect reaction rate?

a)

Increasing temperature= more collisions= increased reaction rate

b)

Decreasing temperature= fewer collisions= increased reaction rate

c)

Temperature has no effect on reaction rate.

d)

Decreasing temperature= more collisions= increased reaction rate

92.

What do you call a chemical that brings particles together so that they can react, but doesn't participate in the reaction itself?

a)

Catalyst

b)

Reactant

c)

Product

d)

Surface area

93.

Which group of particles shows that increasing surface area increases collisions among particles?

a)

Left side

b)

Right side

c)

Cannot be determined by either picture

94.

What effect does increasing surface area have on reaction rate?

a)

Reaction rate increases.

b)

Reaction rate remains the same.

c)

Reaction rate decreases.

95.

Which of the following affect reaction rate? Choose all that apply.

a)

surface area

b)

temperature

c)

products

d)

concentration

96.

If you are changing temperature and measuring time, what is the dependent variable?

a)

time

b)

temperature

c)

the mean

d)

concentration

97.

Increasing the temperature of a reaction will

a)

Increase the rate

b)

Decrease the rate

c)

Not affect the rate

98.

Decreasing the temperature of a reaction will

a)

Increase the rate

b)

Decrease the rate

c)

Not affect the rate

99.

Decreasing the concentration of a reactant will

a)

Increase the rate

b)

Decrease the rate

c)

Not affect the rate

100.

Increasing the concentration of a reactant will

a)

Increase the rate

b)

Decrease the rate

c)

Not affect the rate

101.

Increasing the quantity of a reactant will

a)

Increase the rate

b)

Decrease the rate

c)

Not affect the rate

102.

Decreasing the quantity of a reactant will

a)

Increase the rate

b)

Decrease the rate

c)

Not affect the rate

103.

Decreasing the particle size of a reactant will

a)

Increase the rate

b)

Decrease the rate

c)

Not affect the rate

104.

Increasing the particle size of a reactant will

a)

Increase the rate

b)

Decrease the rate

c)

Not affect the rate

105.

Adding a catalyst to a reaction will

a)

Increase the rate

b)

Decrease the rate

c)

Not affect the rate

106.

Removing a catalyst from a reaction will

a)

Increase the rate

b)

Decrease the rate

c)

Not affect the rate

107.

Decreasing particle size increases the rate because it increases the (a)  

108.

For a collision to be successful, reactants must have the correct ____

a)

Orientation

b)

Energy

c)

Atomic Number

d)

Concentration

109.

Which of the following reactions would produce hydrogen gas most quickly?

a)

1 mol/L HCl & Mg Ribbon

b)

1 mol/L HCl & Mg Powder

c)

3 mol/L HCl & Mg Powder

d)

3 mol/L HCl & Mg Ribbon

110.

Which of the following reactions would produce hydrogen gas most quickly?

a)

1 mol/L HNO3 & Iron Nail

b)

1 mol/L HNO3 & Iron Powder

c)

3 mol/L HNO3 & Iron Powder

d)

3 mol/L HNO3 & Iron Nail

111.

A student investigated the reaction between marble chips and excess dilute hydrochloric acid.

Which of the following would not affect the rate of the reaction?

a)

Increasing the volume of the acid

b)

Decreasing the size of the marble chips

c)

Decreasing the concentration of the acid

d)

Increasing the temperature of the acid

112.

Which of the following pairs of reactants would produce hydrogen most slowly?

a)

Magnesium powder and 4 mol l–1 acid

b)

Magnesium ribbon and 2 mol l–1 acid

c)

Magnesium powder and 2 mol l–1 acid

d)

Magnesium ribbon and 4 mol l–1 acid

113.

Which of the following samples, when reacted with excess 2 mol/L hydrochloric acid, would produce graph Q?

a)

0.5g of magnesium ribbon

b)

0.5g of magnesium powder

c)

1g of magnesium powder

d)

2g of magnesium ribbon

114.

Adding solute to a solvent causes the concentration to...

a)

Increase

b)

Decrease

c)

Stay the same

115.

Adding solvent to a solution causes the concentration to...

a)

Increase

b)

Decrease

c)

Stay the same

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