NEW
Font size
S
M
L
XL
WorksheetsRates of Reactions
Total questions: 20
Worksheet time: 10mins
Name
Class
Date
1.
What is rate of reaction?
a)
How fast a reaction is
b)
How big a reaction is
c)
How loud a reaction is
d)
How much gas a reaction produces
2.
What is required for a reaction to occur?
a)
Collisons
b)
Sufficient Energy
c)
Collisions with sufficient energy
d)
Nothing
3.
What does NOT happen when the temperature is increased?
a)
Particles collide more often
b)
Particles collide with more energy
c)
Particles move faster
d)
More particles collide in the correct orientation
4.
What does a catalyst do?
a)
Stabilises a reaction
b)
Increases the rate of reaction
c)
Cools the reaction down
d)
Increases the concentration of the reaction
5.
In an exothermic reaction, heat is ...
a)
taken in
b)
given out
6.
In an endothermic reaction, heat is ,,,
a)
taken in
b)
given out
7.
This helps to speed up a reaction but does not take part in the chemical reaction.
a)
coeffiecents
b)
reactants
c)
catalyst
d)
combustion
8.
The amount of a substance in a given volume.
a)
concentration
b)
temperature
c)
surface area
d)
catalyst
9.
Grinding a seltzer tablet into powder increases the rate of reaction due to increased
a)
concentration
b)
surface area
c)
temperature
d)
reactants
10.
Exposing more particles for collisions is an increase in
a)
concentration
b)
surface area
c)
temperature
d)
catalyst
11.
Increasing the concentration increases the speed of reaction by
a)
lowering activation energy
b)
increasing collisions
c)
speeding up the reactants
d)
exposing more reactant
12.
True or False. Inhibitors increase the rate of a reaction.
a)
True
b)
False
13.
True or False. Catalysts speed up the rate of a reaction by lowering the activation energy.
a)
True
b)
False
14.
True or False. Catalysts speed up the rate of a reaction by lowering the activation energy.
a)
True
b)
False
15.
In an exothermic reaction the products have
a)
more energy than the reactants
b)
the same energy as the reactants
c)
less energy than the reactants
d)
no energy
16.
In an endothermic reaction the products have
a)
more energy than the reactants
b)
less energy than the reactants
c)
the same energy as the reactants
d)
no energy
17.
The minimum amount of energy required for a reaction to proceed.
a)
activation energy
b)
exothermic energy
c)
endothermic energy
d)
catalyst
18.
Which factors increase the rate of a reaction.
a)
increasing temperature
b)
increasing concentration
c)
increasing surface area
d)
all of these
19.
Which factors decrease the rate of a reaction?
a)
adding a catalyst
b)
decreasing the temperature
c)
increasing surface area
d)
increasing concentration
20.
Increasing concentration increases reaction rate due to more collisions.
a)
True
b)
False
Reset
