WorksheetsKinetics
Total questions: 26
Worksheet time: 19mins
Name
Class
Date
1.
In an exothermic reaction, heat is ...
a)
taken in
b)
given out
2.
In an endothermic reaction, heat is ,,,
a)
taken in
b)
given out
3.
A chemical reaction that produces energy is a /an
a)
endothermic reaction
b)
exothermic reaction
c)
energy
d)
chemical reaction
4.
A chemical reaction that requires energy is a
a)
exothermic reaction
b)
endothermic reaction
c)
over reaction
5.
In an endothermic reaction the system is releasing energy.
a)
True
b)
False
6.
In an exothermic process the surrounding looses heat.
a)
True
b)
False
7.
Do the reactants in an exothermic reaction have a higher or lower energy than the products?
a)
Higher
b)
Lower
8.
Do reactants in an endothermic reaction have a higher or lower energy than the products?
a)
Higher
b)
Lower
9.
During an endothermic reaction in a beaker if we are part of the surroundings and touched the beaker, it would feel _______.
a)
Warm
b)
Cold
10.
Rate of chemical reaction means
a)
amount of product formed
b)
speed of reaction
c)
concentration of reacting particles
d)
combining reactants with products
11.
A substance that increases speed of chemical reaction without being being changed is called:
a)
Catalyst
b)
Acid
c)
Base
d)
pressure
12.
Activation energy is required to start a chemical reaction. What is activation energy?
a)
The maximum amount of energy used
b)
The minimum amount of energy required to cross the reaction barrier
c)
The energy of the reactants
d)
The energy possessed by the products
13.
Increase in temperature of the reactants can do one of the following
a)
Slow collision frequency
b)
Allow less effective collision between the particles
c)
Neutralise the reaction
d)
increase collision between the particles thus increasing the rate.
14.
To slow down a chemical reaction you will do one of the following:
a)
Place the reactants in hot water
b)
Place the products in ice bath
c)
Place the reactants in a ice bath
d)
Keep stirring the reactants with a stirring rod
15.
Reactions that give out heat to the surrounding are classified as one of the following:
a)
Spontaneous
b)
Sluggish
c)
Exothermic
d)
Endothermic
16.
One of the signs of a chemical reaction taking place is:
a)
Bubbles are produced in the reacting vessel
b)
Reactants are not combining
c)
Products are not forming
d)
Colour is not changing
17.
Will adding heat to a reaction increase or decrease the rate of reaction?
a)
increase
b)
decrease
18.
Will removing heat from a reaction increase or decrease the rate of reaction?
a)
increase
b)
decrease
19.
Will adding a catalyst to a reaction increase or decrease the rate of reaction?
a)
increase
b)
decrease
20.
Will diluting a solution increase or decrease the rate of reaction?
a)
increase
b)
decrease
21.
Will increasing the pressure increase or decrease the rate of reaction?
a)
increase
b)
decrease
22.
To measure rate of reaction, we can monitor change in which of the following?
a)
Reactants only
b)
Products only
c)
Reactants or products
23.
Reaction rates change over time as reaction proceeds.
a)
Yes
b)
No
24.
Which of the options below does NOT affect the rate of a reaction?
a)
Concentration
b)
Temperature
c)
Time
d)
Catalyst
25.
What kind of reaction is this?
a)
Endothermic
b)
Exothermic
c)
Cannot be determined
26.
Which letter corresponds to the activation energy of the forward reaction?
a)
A
b)
B
c)
C
d)
D
100 %
