WorksheetsMock Test-Catalysis
Total questions: 50
Worksheet time: 38mins
Name one type of chemical reaction that takes place in the body.
Bio-Chemical
Combination
Combustion
Electrical
What makes chemical reactions happen faster
Time
Water
Enzymes
Agitation
What compound is forced into a can to carbonate liquid to make it soda?
O2
NaCl
KCl
CO2
Name one Catalytic Strategy
Acid
Covalent Catalysis
Magnetism
Catabolic Synthesis
What is the name of the enzyme in the mouth that creates the increased fizzing sensation of soda?
Carbonic Anhydrase
Hydrochloric Acid
Sodium Chloride
Saliva
Before a soda bottle is opened for the first time, the liquid appears non-carbonated. What happens once it is opened?
The liquid flows out of the mouth of the bottle.
The liquid gets a foam at the top.
I don't drink soda.
The liquid slowly begins to fizz.
Why does the answer to question six (6), happen?
Carbonic Acid turns to CO2 and H2O.
I accidentally shook the bottle.
Oxygen flows into the bottle causing a chemical reaction.
The vacuum seal is broken.
What causes the sound when a bottle of soda is first opened?
O2 rushes into the bottle.
The vacuum seal is broken.
Soda rushes to the opening.
CO2 escapes the bottle.
What does catalyst do to a reaction?
Slows down the reaction
Nothing changes
Speeds up the reaction
What do you call the energy that is required to start a reaction?
Alternative energy
Activation energy
Atmospheric energy
Which of the reaction pathway shows the catalysed reaction?
1
2
Which of these reactions are easier to overcome the activation energy barrier?
A
B
What happen to the rate of reaction when a catalyst is added to it?
Increases
Decreases
Nothing changes
A catalyst is __________-specific
Radioactive
Reactive
Reaction
What happens to the molecule of C2H4 and H2 at 4?
H2 breaks its bond, bonded on the catalyst surface
Double bond of C2H4 is broken, 2 C atoms bond to catalyst
H atoms migrate, collide with the bound C species and react
Does the catalyst change the position of equilibrium?
Yes
No
Catalysts may be in the state of ___________.
Solid and liquid only
Solid and gases only
Liquid and gases only
Solid, liquid or gases
In homogeneous catalysis, reactants and catalysts are in the ___________ phase with each other.
Different
Same
In heterogeneous catalysis, reactants and catalysts are in a __________ phase with each other
Different
Same
Which of the following reaction is NOT an example of heterogeneous catalysis?
A
B
C
D
The reactants are ___________ onto the surface of the active sites of the catalyst
Adsorbed
Absorbed
Assimilated
Dissolved
How does a catalyst increase the speed of a reaction? There are more than 1 correct answer.
By providing alternative pathway with lower Ea
By holding the reactants in the right orientation
By changing the position of the equilibrium
By being used up in the course of the reaction
Which of these are the best choice of catalysts?
Expensive and reusable
Cheap and insensitive to impurities
Cheap and easily poisoned
Cheap and reusable
What do you require for a successful reaction to occur? There are more than 1 correct answer.
Collision of reactant particles
Low concentration of reactant
Particles have enough energy to overcome Ea
High activation energy barrier
How does a catalyst work in speeding up a reaction?
By lowering the activation energy or reaction
by giving them more energy
by making them more available
The minimum amount of energy needed for colliding particles to react is called the
Chemical Energy
Kinetic Energy
Activation Energy
Potential Energy
A substance that increases the rate of a reaction without being used up during the reaction is called a
catalyst
product
reactant
solute
What is the name given to a catalyst in the human body?
Biology
Catalyst
Chemical
Enzyme
How does a catalyst work in speeding up a reaction?
By lowering the activation energy or reaction
by making them more available
by giving them more energy
A catalyst changes the mechanism of the reaction
True
False
Catalysts may be in the state of ___________.
Solid and liquid only
Liquid and gases only
Solid and gases only
Solid, liquid or gases
In homogeneous catalysis, reactants and catalysts are in the ___________ phase with each other.
Different
Same
In heterogeneous catalysis, reactants and catalysts are in a __________ phase with each other
Different
Same
Which of these are the best choice of catalysts?
Expensive and reusable
Cheap and insensitive to impurities
Cheap and easily poisoned
Cheap and reusable
Which of these are the best choice of catalysts?
Expensive and reusable
Cheap and insensitive to impurities
Cheap and easily poisoned
Cheap and reusable
Which of these are the BEST way to dispose waste catalyst? There are 2 correct answers.
Landfill
Reuse the waste catalysts
Regenerate the waste catalysts
Leaching by water
Which of these cubes has the lowest surface area to volume ratio?
The small cube
The big cube
Multiple small cubes stacked into a big cube
They all have the same SA:V ratio
How many components do heterogeneous catalysts have?
1
2
3
4
Which of these processes are mainly used to prepare bulk catalysts? Choose ALL of the correct answers.
Impregnation process
Precipitation process
Filtration process
Sol gel process
What is the purpose of catalyst characterisation?
To determine how much a catalyst will cost
To modify the reaction to be less efficient
To understand the relationship between physical, chemical and catalytic properties
To measure basic strength of a catalyst
What does agglomerated mean in mixed agglomerated catalyst?
Mixture is clumped together using chemicals and activated
Mixture is separated into catalyst and active substances
Mixture is clumped together using adsorption and ion-exchange
Mixture is separated into catalyst and powdered support
FCC catalysts are made up of 4 parts, what are they?
Zeolite, Matrix, Regenerator, Filler
Matrix, Reactor, Zeolite, Regenerator
Binder, Filler, Zeolite, Matrix
Reactor, Filler, Binder, Zeolite
What is the purpose of matrix that contains amorphous alumina in FCC?
To provide physical strength and integrity of catalyst
It is the main active component in FCC
To provide catalytic activity sites for larger molecules
It acts as a support material for catalyst
What kind of effect does metal contaminants such as nickel, vanadium and iron have on the catalyst activity?
Helpful
Useless
Harmful
Useful
When a catalyst is capable to do its work, that means the catalyst is ______________
Inactive
Active
Reactive
Unreactive
Which of these are the BEST way to dispose waste catalyst? There are 2 correct answers.
Landfill
Reuse the waste catalysts
Regenerate the waste catalysts
Leaching by water
Why does Pt need to be supported on carrier alumina? Choose all of the correct answers
Pt is a weak catalyst
To maximise surface area of Pt
To effectively exert the catalytic effect of active components
To ensure Pt is doing its job
