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Chemical Reactions Introduction
Test Description: Some basic questions about the five main types of chemical reactions.
Instructions: Answer all questions to get your test result.
1) In a combustion reaction, ________________ is required in order for the reaction to take place.
A
hydrogen
B
oxygen
C
water
D
carbon dioxide
2) Ions that do not participate in a chemical reaction are _____________ ions.
A
spectator
B
negative
C
important
D
positive
3) A + B -- AB is what type of reaction?
A
decomposition
B
single replacement
C
double replacement
D
synthesis
4) The starting substances in a reaction are known as:
A
products
B
substances
C
chemicals
D
reactants
5) The symbol (aq) means
A
dissolved in oil
B
dissolved in water
C
no specific state of matter
D
dissolved in alcohol
6) The total number of ___________ must be equal in a balanced reaction.
A
each type of molecule
B
nothing has to be equal
C
molecules
D
each type of atom
7) AB -- A + B is what type of reaction?
A
double replacement
B
single replacement
C
synthesis
D
decomposition
8) To balance a chemical equation you change ____________.
A
subscripts
B
chemicals
C
coefficients
D
phase of matter
9) The ending substances in a reaction are known as:
A
products
B
reactants
C
materials
D
chemicals
10) A + BC -- B + AC is what type of reaction?
A
single replacement
B
decomposition
C
double replacement
D
synthesis
11) AB + CD -- AD + CB is what type of reaction?
A
single replacement
B
double replacement
C
decomposition
D
synthesis
12) Complete combustion reactions always have products carbon dioxide and ______________.
A
ethanol
B
water
C
carbon monoxide
D
glucose
13) Full chemical reactions always include the _____________ of matter.
A
phases
B
phase changes
C
laws
D
changes
14) You can change a subscript to balance a chemical reaction.
A
never
B
sometimes
C
not often
D
Always
15) A balanced chemical reaction has the same number of _____________ on each side.
A
molecules
B
molecules of each compound
C
atoms
D
atoms of each element
*select an answer for all questions
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