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Intro to Kinetics

Total questions: 29

Worksheet time: 24mins

Name
Class
Date
1.
What two factors govern whether a collision between reacting particles will be effective?
a)
orientation and potential energy 
b)
kinetic energy and temperature 
c)
kinetic energy and orientation 
d)
potential energy and kinetic energy 
2.
Under the collision theory, the particles must collide with  ____ and ____ for a reaction to occur.
a)
sufficient rate and sufficient energy
b)
sufficient surface area and correct orientation
c)
sufficient catalyst and sufficient energy
d)
sufficent energy and correct orientation
3.
More collisions correspond to a: 
a)
Faster reaction rate  
b)
Slower reaction rate
c)
Constant reaction rate 
d)
None of the above
4.
Which of the following is NOT a factor affecting reaction rate?
a)
temperature
b)
catalysts
c)
particle size
d)
polarity
5.
Reaction rate means...
a)
amount of product formed
b)
speed of reaction
c)
concentration of reacting particles
d)
combining reactants with products
6.
Decreasing the particle size increases the reaction rate because
a)
It makes particles move faster
b)
It increases the likelihood of collisions with the correct geometry
c)
It decreases the surface area available to react
d)
It increases the number of collisions
7.
To slow down a chemical reaction you will do one of the following:
a)
Place the reactants in hot water
b)
Place the products in ice bath
c)
Place the reactants in a ice bath
d)
Keep stirring the reactants with a stirring rod
8.
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
9.
Which of the following increase the reaction rate?
a)
less surface area
b)
lower temperature
c)
an inhibitor
d)
increased concentration
10.
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
11.

If the temperature is reduced, a reaction rate will ______

a)

increase

b)

decrease

c)

stay the same

12.

If the concentration of a reactant is increased, the reaction rate will ___________.

a)

increase

b)

decrease

c)

stay the same

13.

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

14.
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
15.
Grinding a seltzer tablet into powder increases the rate of reaction due to...
a)
increased concentration of reactants
b)
increased surface area
c)
increased speed of particles.
d)
better orientation of reactants
16.
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
17.
Catalysts permit reactions to happen with a __________ activiation energy.
a)
lower
b)
higher
18.
True or False? The higher the concentration of a solution the less solutes it has in it.
a)
True
b)
False
19.
Smaller particle size allows for a _________ surface area to be exposed for the reaction.
a)
larger
b)
smaller
20.
Increasing the temperature will increase the kinetic energy of particles, therefore increasing the collisions between particles.
a)
false
b)
true
21.
Usually lowering the temperature will slow down a reaction.
a)
false
b)
true
22.

The oxidizing of copper (think the statue of liberty) is a fast reaction. True or false?

a)

True

b)

False

23.

The decomposition of nuclear fuel rods is a slow process. True or false?

a)

True

b)

False

24.

What determines the rate of a reaction?

a)

The number of steps.

b)

The rate determining step.

c)

Both the number of steps and the rate determining step.

d)

Neither has anything to do with reaction rate.

25.

Why do covalent reactants typically take longer to react than ionic reactants?

a)

Covalent compounds are usually larger than ionic compounds so it takes more time to break all of the bonds and then rearrange them in a new compound.

b)

Covalent compounds share electrons while ionic compounds transfer electrons. The redistribution of electrons takes longer.

c)

Covalent compounds do NOT typically take longer to react.

26.

Kinetics can be defined as:

a)

the study of the rate or speed at which a reaction occurs

b)

a step by step process needed to get from reactants to products

c)

a substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change

27.

Catalyst can be defined as:

a)

the study of the rate or speed at which a reaction occurs

b)

a step by step process needed to get from reactants to products

c)

a substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change

28.

Reaction mechanism can be defined as:

a)

the study of the rate or speed at which a reaction occurs

b)

a step by step process needed to get from reactants to products

c)

a substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change

29.

The combustion of octane (gasoline) is considered to be a slow reaction. True or false?

a)

True

b)

False

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