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Chapter 6 Qs For Final Review
Test Description: Ch 6 Qs
Instructions: Answer all questions to get your test result.
1) Which of the following is an example of a decomposition reaction?
A
photosynthesis
B
polymerization
C
digestion
D
exchange of ions between two compounds
2) Which statement about endothermic reactions is true?
A
energy is always created in the form of heat
B
energy is used to force electrons to move to higher energy levels
C
energy is transferred from surroundings to the reactants
D
energy is transferred from the reactants to the surroundings
3) A balanced chemical equation shows proportions of reactants and products necessary for
A
energy to be minimized.
B
electrolysis to occur.
C
mass to be conserved.
D
the reaction to occur.
4) A synthesis reaction is a reaction between at least two compounds in which...
A
one breaks down into at least two products.
B
a new. more complex compound is formed.
C
a compound burns in the presence of oxygen.
D
a compound is decomposed by an electric current.
5) A chemical equation is balanced by changing or adding...
A
reactants.
B
coefficients.
C
subscripts.
D
powers.
6) In an exothermic reaction, energy is transferred from
A
the reactants to the surroundings.
B
one reactant to another.
C
the container to the chemicals.
D
the surroundings to the reactants.
7) An enzyme is a special kind of catalyst that works to...
A
slow down a chemical reaction.
B
break down chemical elements.
C
speed up a specific biochemical reaction.
D
maintain the correct temperature for a reaction.
8) In a balanced chemical reaction, the total mass of the products always equals the...
A
molar mass of the reactants.
B
atomic mass of the reactants.
C
total mass of the reactants.
D
proportional masses of the reactants.
9) A reaction in which a single compound breaks down to form 2 or more simpler substances is called _____________________________.
A
synthesis
B
double-displacemet
C
decomposition
D
single-displacement
10) A substance that forms in a chemical reaction is called....
A
an ion.
B
a reactant.
C
a chemical bond.
D
a product.
11) A reaction in which two or more substances combine to form a new compound is called...
A
combustion.
B
electrolysis.
C
synthesis.
D
decomposition.
12) A reaction in which heat is released to the surroundings is called...
A
exothermic.
B
combustion.
C
endothermic.
D
decomposition.
13) The oxidation reaction of an organic compound in which heat is released is called...
A
synthesis.
B
decomposition.
C
combustion.
D
exothermic.
14) A ________________ is a substance that changes the rate of a reaction without being consumed or changed significantly.
A
radical
B
catalyst
C
enzyme
D
substrate
15) _____________________ is the relative number of moles of the substances required to produce a given amount of product in a reaction.
A
Molecular formula
B
Molar mass
C
Mole ratio
D
Moles
16) The process by which an electric current is used to produce a chemical reaction, such as the decomposition of water is called...
A
combustion.
B
decomposition.
C
synthesis.
D
electrolysis.
17) An organic group that has one or more electrons available for bonding is called...
A
a radical.
B
a catalyst.
C
a substrate.
D
an enzyme.
18) A substance or molecule that participates in a chemical reaction is called...
A
a catalyst.
B
a reactant.
C
a substrate.
D
a product.
19) A __________________ is a chemical reaction that requires heat.
A
exothermic reaction
B
oxidation reduction reaction
C
combustion reaction
D
endothermic reaction
20) ___________________ is the energy released when a chemical compound reacts to produce new compounds.
A
Chemical bond
B
Chemical energy
C
Exothermic energy
D
Chemical formula
*select an answer for all questions
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