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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
chemical reaction
B
exothermic reaction
C
activation energy
D
endothermic reaction
2) the minimum amount of energy needed to start a chemical reaction
A
reaction rate
B
activation energy
C
thermal energy
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
subscript
C
rate of reaction
D
formula
4) a substance that exist before a chemical reaction
A
products
B
enzymes
C
reactants
D
inhibitors
5) the process that produces chemical change, resulting in new substances with properties that are different from those in the original substances
A
rate of reaction
B
concentration
C
chemical equation
D
chemical reaction
6) a substance that speeds up a chemical reaction
A
reactants
B
catalyst
C
inhibitor
D
enzyme
7) a measure of how fast a chemical reaction occurs
A
formula
B
rate of reaction
C
product
D
concentration
8) a chemical reaction in which heat energy is absorbed
A
exothermic reaction
B
chemical reaction
C
endothermic reaction
D
activation energy
9) catalysts that are large protein molecules which speed up reactions
A
inhibitors
B
products
C
reactants
D
enzymes
10) a substance that slows down a chemical reaction
A
catalyst
B
product
C
enzyme
D
inhibitor
11) describes how much solute is present in a solution compared to solvent
A
chemical formula
B
product
C
rate of reaction
D
concentration
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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