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Ch 7
Test Description: .
Instructions: Answer all questions to get your test result.
1) A chemical reaction that transfers energy from the reactants to the surrounding is referred to as
A
endergonic
B
elemental
C
exothermic
D
endothermic
2) A change in color is a sign that a(n) _____is taking place
A
endothermic reaction
B
elemental reaction
C
exothermic reaction
D
chemical reaction
3) Sound is not made of matter because is has no ______ or __________
A
space/time
B
elements/proportions
C
ice/water
D
mass/volume
4) In a ________ reaction the reactants are broken down into other substances
A
decomposition
B
exothermic
C
endothermic
D
synthesis
5) A substance is ______________ when it gaines electrons
A
reversed
B
oxidized
C
unhappy
D
reduced
6) When a reaction is at equillibrium, increasing pressure favors the reaction that produces
A
more gas
B
no gas
C
electrons
D
less gas
7) A sign that a chemical reaction is taking place is release of energy in the form of __________ or ___________
A
apple pie, baseball
B
heat, light
C
villains, victory
D
endothermic, exothermic
8) A(n) ____________ reaction is one in which heat is transferred from the surrounding reactants
A
endothermic
B
combustive
C
redox
D
exothermic
9) A reaction that involves the transfer of ____________ is called a(n) ________reaction
A
credit, financial
B
electrons, redox
C
heat, light
D
more gas, less gas
10) Equilibrium is achieved when the __________ and ____________________ reactions continue to take place at the same rate
A
fast,slow
B
forward, reverse
C
hot, cold
D
old, new
*select an answer for all questions
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