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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 temperature / Δ time
B
Δ kinetic energy / Δ time
C
Δ concentration / n. of moles
D
Δ concentration / Δ time
2) a reaction rate can be calculated as:
A
Δ temperature / Δ time
B
Δ concentration / n. of moles
C
Δ concentration / Δ time
D
Δ pressure / Δ time
3) according to the collision theory
A
the products are called activated complex
B
reactants must collide with the proper orientation
C
every collision forms products
D
the reactants are called activated complex
4) the activated complex
A
has the same energy as the reactants
B
has lower energy than the products
C
has higher energy than the reactants
D
does not require energy to form
5) concentration is
A
the number of moles of a chemical
B
a form of energy
C
quantity / volume
D
the rate of a reaction
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
reduces the activation energy
B
creates an activated complex with less energy
C
participates in the reaction but is not depleted
D
slows down reactions
8) If the concentration of the reactants increase
A
the reaction slows down
B
the reaction rate increases
C
the activation energy is reduced
D
the reactants energy increases
9) If the surface area of solid reactants increases
A
the creation of activated complexes is more likely
B
the reaction slows down
C
the pressure increases
D
the activation energy is decreased
10) When temperature increases (find the false one)
A
the collisions have more kinetic energy
B
the reaction rate increases
C
the collisions happen more frequently
D
the activation energy increases
*select an answer for all questions
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