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