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Rate Of Reaction
Quiz 3
Solution
Q.1.
Which of the following explains the meaning of effective collision?
The collision where its energy is less than the activation energy
The collision that has a low energy
The collision which takes place before a reaction
The collision that causes a reaction
Q.2.
Which of the following is the meaning of activation energy?
The minimum amount of energy that particles must have in order to react
The maximum energy that the particles need to produce effective collision
The amount of energy used by the particles during a collision
The amount of kinetic energy of molecules during a collision
Q.3.
Which factors affect the rate of a reaction?
temperature
pressure
concentration
catalyst
All of the above
Q.4.
Grinding an effervescent tablet into powder increases the rate of reaction due to increase of
concentration
temperature
size
total surface area
Q.5.
As the frequency of ________________ collision increases, the rate of reaction increases.
time
speed
effective
None
Q.6.
Why does a catalyst increase the rate of reaction?
it produces extra energy for the reactants
it increases the speed of the reactant particles
it increases the frequency of particle collisions
it reduces the activation energy of the reaction
Q.7.
Define rate of reaction?
The change in concentration of reactants or products per time unit.
The change in volume of products multiplied by the change in volume of reactants.
The change of products over the change of reactants.
How much the reactants react in a given time unit.
Q.8.
Which of the following would increase the INITIAL reaction rate between 5.0 g aluminium and 20.0 mL of 1.M hydrochloric acid?
Conducting the experiment in a 50 mL beaker rather than a 100 mL beaker.
Using a larger volume of acid.
Cleaning the surface of the metal with sandpaper.
Increasing the pressure under which the experiment was conducted.
Q.9.
Increasing pressure means that particles are ___________ together.
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