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Chemical Reactions-Ch.7
Test Description: Rates of Chemical Reactions
Instructions: Answer all questions to get your test result.
1) a chemical reaction in which heat energy is released
A
endothermic reaction
B
exothermic reaction
C
chemical reaction
D
activation energy
2) the minimum amount of energy needed to start a chemical reaction
A
thermal energy
B
activation energy
C
reaction rate
D
heat energy
3) a shorthand form for writing what reactants are used and what products are formed in a chemical reaction
A
chemical equation
B
rate of reaction
C
subscript
D
formula
4) a substance that exist before a chemical reaction
A
reactants
B
inhibitors
C
products
D
enzymes
5) the process that produces chemical change, resulting in new substances with properties that are different from those in the original substances
A
chemical reaction
B
rate of reaction
C
concentration
D
chemical equation
6) a substance that speeds up a chemical reaction
A
catalyst
B
reactants
C
inhibitor
D
enzyme
7) a measure of how fast a chemical reaction occurs
A
product
B
concentration
C
rate of reaction
D
formula
8) a chemical reaction in which heat energy is absorbed
A
endothermic reaction
B
exothermic reaction
C
activation energy
D
chemical reaction
9) catalysts that are large protein molecules which speed up reactions
A
enzymes
B
products
C
reactants
D
inhibitors
10) a substance that slows down a chemical reaction
A
inhibitor
B
enzyme
C
catalyst
D
product
11) describes how much solute is present in a solution compared to solvent
A
rate of reaction
B
concentration
C
chemical formula
D
product
12) a substance that forms as a result of a chemical reaction
A
product
B
catalyst
C
enzyme
D
reactant
*select an answer for all questions
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