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