Atomic Theory And The Periodic Table Worksheet With Answers Page 13
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1782. In order to start a campfire, wood is chopped into many small pieces, called kindling. Which factor
makes it easier to light a fire using kindling instead of large pieces of wood?
a) temperature
b) concentration
c) surface area
d) catalyst
83. If you have had your gall bladder removed, you may have trouble digesting fats. It is possible in some
cases to take an enzyme called lipase, which helps to digest fats.
With respect to rates of reactions, which factor is best illustrated by taking lipase?
a) introducing a catalyst
b) increasing temperature
c) increasing surface area
d) increasing concentration
84. Why does putting food in a refrigerator slow the spoilage of the food?
a) The decreased temperature speeds up the molecules, making the reactions slower.
b) The decreased temperature slows down the molecules making the reactions faster.
c) The decreased temperature slows down the molecules making the reactions slower.
d) Keeping the food in the refrigerator decreases the concentration of oxygen.
85. Which of the following is not a factor that affects the rate of reaction?
a) changing the temperature
b) changing the colour of the reactants
c) changing the surface area of the reactants
d) changing the concentration of the reactants
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