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WorksheetsReactions Review
Total questions: 10
Worksheet time: 10mins
Name
Class
Date
1.
What is the definition of a toxin?
a)
A change where a new substance is formed
b)
What you start with during a chemical reaction
c)
Substances that can be harmful if eaten/drank, breathed, or touched
d)
Nothing is gained or lost during a chemical reaction
2.
What is the reaction arrow?
a)
represents "to produce" or "resulting in" in a chemical equation
b)
two reactants combine to form a single product
c)
a change where a new substance is formed
d)
atoms of one element are exchanged with atoms of a different element in a compound
3.
What does "balanced" mean?
a)
the small (in size) numbers that represent the number of atoms in a compound
b)
the simplest chemical formula represented by small (in quantity) whole numbers
c)
a change in phase, but not identity
d)
When every atom is accounted for in a chemical equation
4.
What is a chemical equation?
a)
the simplest chemical formula represented by small whole numbers
b)
A representation of the exact ratios of reactants that combine to form products
c)
when every atom is accounted for in a chemical equation
d)
one reactant breaks down to form two or more products
5.
a)
A
b)
B
c)
C
d)
D
6.
a)
A
b)
B
c)
C
d)
D
7.
a)
A
b)
B
c)
C
d)
D
8.
Ways to tell that a chemical reaction has occurred include
a)
Release of heat or light
b)
observable bubbles
c)
changing colors
d)
all of the above
9.
what is B
a)
Coefficient
b)
Phase
c)
Formula Unit
d)
Subscript
10.
What type of reaction is this Zn(s) + HCl(aq) → ZnCl2(aq) + H2(g)
a)
Double exchange
b)
Combination
c)
Decomposition
d)
Single Exchange
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