
Reaction Rates and Equilibrium
Authored by Lisa Thompson
Science
11th Grade
NGSS covered

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25 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What term is used to describe a chemical reaction in which the forward and reverse reaction rates are the same?
A static equilibrium
An equal equilibrium
A dynamic equilibrium
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is the effect of decreasing the pressure on the following equilibrium 2NO(g) + O2(g) ⇌ 2NO2(g)?
Less NO2 will be produced
Less NO and O2 is formed
No change will occur
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What name is given to the minimum amount of energy needed by particles for them to react when they collide?
Activation energy
Catalytic energy
Threshold energy
Tags
NGSS.HS-PS1-5
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is the name of the model which is used to explain how different factors affect the rate of a reaction?
Particle theory
Big Bang theory
Collision theory
Tags
NGSS.HS-PS1-5
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Why does a higher surface area of a solid reactant increase the reaction rate?
It increases the density of the reactant
It decreases the path length for diffusion
It increases the number of available reactive sites
It increases the activation energy required for the reaction
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
In a chemical reaction, if the concentration of reactants is increased, what happens to the reaction rate?
It decreases
It increases
It remains unchanged
It initially increases, then decreases
Tags
NGSS.HS-PS1-5
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Crushing a solid catalyst into finer particles before adding it to a reaction mixture will:
Decrease the reaction rate.
Have no effect on the reaction rate.
Increase the reaction rate.
Stop the reaction.
Answer explanation
Increasing the surface area of a solid reactant will increase the reaction rate by providing more area for collisions between reactant particles.
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