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Reaction Rates Basics
Test Description: HS reaction rates, and collision theory basics. For ESL or below level students.
Instructions: Answer all questions to get your test result.
1) a reaction rate can be calculated as:
A
Δ kinetic energy / Δ time
B
Δ concentration / Δ time
C
Δ temperature / Δ time
D
Δ concentration / n. of moles
2) a reaction rate can be calculated as:
A
Δ concentration / n. of moles
B
Δ concentration / Δ time
C
Δ temperature / Δ time
D
Δ pressure / Δ time
3) according to the collision theory
A
the reactants are called activated complex
B
the products are called activated complex
C
every collision forms products
D
reactants must collide with the proper orientation
4) the activated complex
A
does not require energy to form
B
has lower energy than the products
C
has higher energy than the reactants
D
has the same energy as the reactants
5) concentration is
A
quantity / volume
B
the rate of a reaction
C
the number of moles of a chemical
D
a form of energy
6) activation energy
A
is the energy of the products
B
is the energy released by an activated complex
C
is the energy of the reactants
D
is the energy required to create the activated complex
7) a catalyst (find the false one)
A
participates in the reaction but is not depleted
B
slows down reactions
C
reduces the activation energy
D
creates an activated complex with less energy
8) If the concentration of the reactants increase
A
the reaction slows down
B
the activation energy is reduced
C
the reactants energy increases
D
the reaction rate increases
9) If the surface area of solid reactants increases
A
the activation energy is decreased
B
the creation of activated complexes is more likely
C
the reaction slows down
D
the pressure increases
10) When temperature increases (find the false one)
A
the activation energy increases
B
the collisions happen more frequently
C
the collisions have more kinetic energy
D
the reaction rate increases
*select an answer for all questions
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