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Review Of 6-1
Test Description: Review question for 6-1 quiz (The nature of Chemical Reactions)
Instructions: Answer all questions to get your test result.
1) Which these is not a sign of a chemical reaction?
A
A color change occurs.
B
Heat is released.
C
A gas is given off.
D
The material dissolves.
2) The substance that is formed in a chemical reaction is called the
A
polymer
B
reactant
C
product
D
radical
3) Which of the following stores chemical energy?
A
the nucleus of an atom
B
the bonds of a molecule
C
the density of the substance
D
the temperature of a substance
4) Which of the following occurs in an endothermic reaction but not in an exothermic reaction?
A
Molescules are formed.
B
Chemical bonds are broken
C
Energy is absorbed
D
Atoms are rearranged.
5) A type of endothermic reaction is
A
an exploding firecracker
B
photosynthesis by a plant
C
burning gasoline
D
bioluminescence by a firefly
6) A type of reaction that produces an increase in temperature is
A
endothermic
B
nonpolar
C
covalent
D
exothermic
7) A reaction in which the products contain more chemical energy than the reactants is
A
endothermic
B
exergonic
C
electrical
D
exothermic
8) Which of these represents the release of chemical energy?
A
pouring gasoline into a tank
B
a toy car running down a ramp
C
warming food in a microwave
D
burning charcoal in a grill
9) Which of the following are products and reactants of a chemical reaction most likely to have in common?
A
molecules
B
chemical properties
C
physical properties
D
atoms
10) Which of the following occurs when gasoline is burned?
A
New atoms are formed.
B
all of these
C
New elements are formed.
D
New molecules are formed
*select an answer for all questions
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