Worksheetsconcentration and reaction rate
Total questions: 10
Worksheet time: 17mins
Name
Class
Date
1.
Why does a higher concentration increase the rate of reaction?
a)
it increases the amount of reactants
b)
it lowers the activation energy
c)
it increases the energy of particle collisions
d)
it increases the frequency of particle collisions because there are more collision sites
2.
If the reactant particles collide with less energy than the activation energy, the particles will be rebound, and no reaction will occur.
a)
True
b)
False
3.
The collisions which bring about a chemical reaction are called:
a)
Consistent collisions
b)
Normal collisions
c)
Effective collisions
4.
Which of the following is/are the fundamental idea(s) of collision theory?
a)
Molecules react by colliding together
b)
The effective collisions must occur with certain minimum amounts of energy
c)
In a large sample, the greater the number of effective collisions, and the faster the rate of reaction
d)
All of the above
5.
The rate of a chemical reaction is NOT affected by which of the following:
a)
temperature
b)
concentration
c)
particle size (surface area)
d)
All of these affect reaction rates
6.
Products will form faster if____________
a)
the particle size of the reactants are larger.
b)
temperature is decreased.
c)
concentration of the reactants are increased.
d)
the reaction is not stirred.
7.
Increasing the concentration of the reactants will slow down the reaction.
a)
false
b)
true
8.
The rate of a chemical reaction is NOT affected by which of the following:
a)
temperature
b)
concentration
c)
particle size (surface area)
d)
All of these affect reaction rates
9.
Products will form faster if____________
a)
the particle size of the reactants are larger.
b)
temperature is decreased.
c)
concentration of the reactants are increased.
d)
the reaction is not stirred.
10.
Increasing the concentration of the reactants will slow down the reaction.
a)
false
b)
true
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