WorksheetsChemical Reactions
Total questions: 33
Worksheet time: 2hrs 39mins
Name
Class
Date
1.
What type of reaction is when a substance breaks down into two or more substances?
a)
synthesis
b)
decomposition
c)
single replacement
d)
double replacement
2.
In this type of reaction two elements in different compounds trade places.
a)
synthesis
b)
decomposition
c)
single replacement
d)
double replacement
3.
In this type of reaction one element replaces another in a compound.
a)
synthesis
b)
decomposition
c)
single replacement
d)
double replacement
4.
In this type of reaction two or more substances combine to form another substance.
a)
synthesis
b)
decomposition
c)
single replacement
d)
double replacement
5.
This describes a chemical reaction using chemical formulas and other symbols.
a)
Chemical Equation
b)
Chemical Symbol
c)
Law of Conservation of Mass
d)
Activation Energy
6.
This speeds up a chemical reaction but is not used up itself.
a)
Inhibitor
b)
Enzyme
c)
Preservative
d)
Catalyst
7.
These types of reactions absorb energy making them feel cooler.
a)
Exothermic
b)
Endothermic
c)
Catalyst
d)
Enzyme
8.
In this type of reaction, energy is given off primarily in the form of heat and/or light.
a)
Exothermic
b)
Endothermic
c)
Catalyst
d)
Enzyme
9.
Inhibitors in food items
a)
Catalyst
b)
Inhibitor
c)
Preservative
d)
Precipitate
10.
Slows down a chemical reaction
a)
Catalyst
b)
Inhibitor
c)
Preservative
d)
Precipitate
11.
A solid, insoluble compound that forms when two liquids are combined
a)
Catalyst
b)
Inhibitor
c)
Preservative
d)
Precipitate
12.
The numbers that represent the number of units of each substance taking part in the reaction.
a)
Exothermic
b)
Endothermic
c)
Coefficient
d)
Precipitate
13.
What are the substances to the left of the arrow in a chemical reaction known as?
a)
Formulas
b)
Products
c)
Reactants
d)
Coefficients
14.
What are the substances to the right of the arrow in a chemical reaction known as?
a)
Formulas
b)
Products
c)
Reactants
d)
Coefficients
15.
What does (s) stand for in the equation shown?
a)
solid
b)
liquid
c)
gas
d)
aqueous
16.
What number is understood if no number is written before a compound or element in a chemical reaction?
a)
0
b)
1
c)
2
d)
3
17.
According to the Law of Conservation of Mass, how many grams of water should be produced from this reaction?
a)
20
b)
4
c)
18
d)
12
18.
Which one of the following is not an example of an exothermic reaction?
a)
Burning wood
b)
Glow Sticks
c)
Firecracker exploding
d)
Instant cold pack
19.
Tony Stark and Bruce Banner were each holding a container with liquids (One clear, one is black) given to them by Peter Quill. When the liquids combine it bubbles and fizzes. It also gives off heat and produce a golden solid at the bottom of the beaker. Which one of the following is not an indication of a chemical reaction has occurred?
a)
gas produced
b)
temperature changed
c)
solid substance formed
d)
one was clear and one was black
20.
What number is needed in front of the H2O for this equation to be balanced?
a)
It doesn't need a number
b)
1
c)
2
d)
0
21.
Which one of the following reactions is not balanced?
a)
A
b)
B
c)
C
d)
D
22.
What type of reaction is shown
a)
Synthesis
b)
Decomposition
c)
Single replacement
d)
Double replacement
23.
What type of reaction is shown
a)
Synthesis
b)
Decomposition
c)
Single replacement
d)
Double replacement
24.
What type of reaction is shown
a)
Synthesis
b)
Decomposition
c)
Single replacement
d)
Double replacement
25.
What type of reaction is shown
a)
Synthesis
b)
Decomposition
c)
Single replacement
d)
Double replacement
26.
How can a chemical equation be balanced?
a)
changing subscripts
b)
erasing elements as necessary
c)
adding coefficients
d)
adding elements as necessary
27.
What are the products in the equation?
a)
Zn and CuSO4
b)
Zn and Cu
c)
ZnSO4 and Cu
d)
Zn only
28.
Which of the following is the balanced equation for Zn + HCl --> ZnCl2 + H2?
a)
Zn + HCl --> 2ZnCl2 + H2
b)
Zn + 2HCl --> ZnCl2 + H2
c)
2Zn + HCl --> 2ZnCl2 + H2
d)
Zn + 2HCl --> 2ZnCl2 + H2
29.
If a chemical reaction is EXOTHERMIC, the temperature would....
a)
Stay the same
b)
Increase
c)
Decrease
30.
What type of reaction occurs in a hand warmer?
a)
exothermic
b)
endothermic
31.
Burning a match is an example of what type of reaction?
a)
Endothermic
b)
Exothermic
c)
Neutralisation
d)
Physical
32.
Fireworks are an example of
a)
exothermic
b)
endothermic
c)
both
d)
none
33.
An ice pack in an example of
a)
exothermic
b)
endothermic
c)
both
d)
none
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