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Rates of Reactions JCT COL

Total questions: 44

Worksheet time: 24mins

Name
Class
Date
1.

List four factors that affects the rate of a reaction

a)

temperature

b)

concentration

c)

surface area

d)

volume

e)

catalysts

2.

A temperature increase causes the particles ......

a)

to slow down

b)

move faster

c)

collide higher

d)

in the right order

3.

How does a catalyst work in speeding up a reaction?

a)

By lowering the activation energy or reaction

b)

by giving them more energy

c)

by making them more available

4.
The following graph shows two different reaction pathways for the same overall reaction at the same temperature. Which pathway is slower and why?
a)
Red, because the activation energy is larger
b)
Blue, because the activation energy is lower
c)
both reaction progress at the same rate
5.
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
6.
In an exothermic reaction, heat is ...
a)
taken in
b)
given out
7.

The ______________is required to break the bonds of the reactants.

a)

Carbonic energy

b)

Activation energy

c)

Plutonic energy

d)

Energi Gaib

8.
What is the 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
9.
Located on the left side of the reaction
a)
reactants
b)
products
10.

The minimum amount of energy needed for colliding particles to react is called

a)

Chemical Energy

b)

Kinetic Energy

c)

Activation Energy

d)

Potential Energy

11.
Grinding a seltzer tablet into powder increases the rate of reaction due to increased
a)
concentration
b)
surface area
c)
temperature
d)
reactants
12.

A temperature increase causes the particles ......

a)

to slow down

b)

move faster

c)

collide higher

d)

in the right order

13.

Which factors increase the rate of a reaction?

a)

increasing temperature

b)

increasing concentration

c)

increasing surface area

d)

All of these

14.

The rate of a reaction is how _____________ a reaction occurs.

a)

Quickly

b)

Easily

c)

Unusually

d)

Differently

15.

Decreasing the size of the reaction container means that particles are ___________ together.

a)

Happy

b)

Never

c)

Paired

d)

Closer

16.

Increasing the temperature gives particles more __________.

a)

Time

b)

Energy

c)

Space

d)

Frequency

17.

As the frequency of ______________ increases, the rate of reaction increases.

Hint: frequency means how often

a)

Time

b)

Reactions

c)

Collisions

d)

Reactants

18.

Increasing the temperature, increases the _____ of reaction

a)

Catalyst

b)

Time

c)

Rate

d)

Weight

19.
Rate of chemical reaction means
a)
amount of product formed
b)
speed of reaction
c)
concentration of reacting particles
d)
combining reactants with products
20.
Why does breaking up a solid reactant increase the rate of reaction?
a)
it creates more solid
b)
it creates more energy
c)
it increases the surface area
d)
it increases the concentration
21.
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
22.
In an exothermic reaction, heat is ...
a)
taken in
b)
given out
23.

In an endothermic reaction, heat is ...

a)

taken in

b)

given out

24.
If a chemical reaction is EXOTHERMIC, the temperature would....
a)
Stay the same
b)
Increase
c)
Decrease
25.
In an endothermic reaction the system is releasing energy.
a)
True
b)
False
26.
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
27.
Baking bread and cooking an egg are examples of....?
a)
Endothermic processes
b)
Exothermic processess
c)
None of these 
28.
Is photosenthysis an Exothermic or an Endothermic reaction?
a)
Endothermic
b)
Exothermic
29.
What type of reaction is shown in the photo?
a)
Exothermic
b)
Isothermic
c)
Endothermic
d)
None of the  above
30.

What type of reaction occurs in a hand warmer?

a)

exothermic

b)

endothermic

31.

Which of the following is a sign that a chemical reaction has occurred?

a)

change in shape

b)

melting

c)

there was colour change

d)

dissolving

32.

The graph above is from which type of reaction?

a)

Endothermic reaction

b)

Exothermic Reaction

33.

The graph above is from which type of reaction?

a)

Endothermic reaction

b)

Exothermic reaction

34.

Which of the following SPEEDS up a reaction?

a)

catalyst

b)

inhibitor

c)

neither

35.
After you mix two substances together, a new substance forms.  This is an example of:
 
a)
 Physical Change
b)
 Chemical Change
36.
If a chemical reaction is EXOTHERMIC, the temperature would....
a)
Stay the same
b)
Increase
c)
Decrease
37.
Which of the following is a sign that a chemical reaction has occurred?
a)
change in shape
b)
melting
c)
bubbles of gas appear
d)
dissolving
38.

Which of the following is a sign that a chemical reaction has occurred?

a)

change in shape

b)

melting

c)

there was colour change

d)

dissolving

39.

What kind of change occurs if matter changes in amount, size, or shape?

a)

substance change

b)

chemical change

c)

physical change

d)

elemental change

40.
Ice melting
a)
Chemical Change
b)
Physical Change
41.
Blue liquid and yellow liquid mixed to make a green liquid
a)
Chemical Change
b)
Physical Change
42.
Glass bottle that is shattered
a)
Chemical Change
b)
Physical Change
43.
Is hammering wood together to build a house a chemical or physical change?
a)
chemical
b)
physical
44.
Is melting butter for popcorn a chemical or physical change?
a)
chemical
b)
physical

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