Catalysts

Quiz
•
Science
•
5th Grade
•
Hard
Earlston Science
FREE Resource
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the main function of a catalyst in a chemical reaction?
Increase the temperature of the system
Lower the activation energy
Increase the energy of the reactants
Increase the concentration of products
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How does a catalyst increase the rate of a chemical reaction?
By changing the enthalpy of the products
By increasing particle collisions
By providing an alternative reaction pathway with a lower activation energy
By raising the temperature
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is true about a catalyst?
It is consumed in the reaction
It increases the activation energy
It alters the position of equilibrium
It can be recovered chemically unchanged at the end of the reaction
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In a potential energy diagram, the presence of a catalyst is shown by:
A lower reactant energy level
A lower activation energy peak
A higher product energy level
A lower product energy level
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which type of catalyst works by adsorbing reactants onto its surface?
Biological catalyst
Homogeneous catalyst
Enzyme catalyst
Heterogeneous catalyst
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why are transition metals often used as catalysts?
They are highly reactive
They have low melting points
They can form variable oxidation states and complex ions
They do not form compounds
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In catalytic converters used in cars, platinum acts as a catalyst to:
Lower fuel consumption
Convert nitrogen to ammonia
Convert harmful gases like CO and NO into less harmful substances
Increase the temperature of the engine
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