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Physical And Chmical Change Review
Test Description: Utah St 1 ob 1 - 2
Instructions: Answer all questions to get your test result.
1) Which of the following is an example of a chemical property of water? It
A
reacts with calcium
B
is transparent
C
has no odor
D
boils at 100 C
2) Which of the following is an example of a physical property of hydrogen? It
A
reacts with oxygen
B
is highly flammable
C
forms hydrochloric acid
D
is less dense than air
3) Which of the following is true of chemical properties? They
A
are measurements of the size or mass of the substance
B
explain how the substance reacts with other substances
C
predict how much of the substance is found in the universe.
D
describe the phase the substance is in
4) Two students mix vinegar and baking soda. They observe bubbles forming, baking soda dissolving, and vinegar turning cloudy. They infer that a chemical change has occurred. Which data support this inference?
A
vinegar evaporated
B
bubbles formed
C
baking soda dissolved
D
color of vinegar changed
5) Which is a chemical change
A
Density
B
Phase at room temperature
C
Reaction with water
D
Solid
6) Which of the tests measured physical properties?
A
phase, reaction to water
B
reaction to flame and water
C
density, reaction to flame
D
density, phase
7) Which of these substances would be classified as highly flammable?
A
water, sugar
B
iron, plastic
C
paper, gasoline
D
salt, air
8) Which of these substances would be classified as flexible?
A
salt, iron
B
water, paper
C
paper, plastic
D
sugar, gasoline
9) An ice cube is left on a table for an hour. What evidence shows a physical change takes place?
A
It gives off carbon dioxide
B
It bubbles and gives off gas
C
It turns into a different substance
D
It melts into water
10) Salt is mixed with water and stirred. Is this a physical or chemical change?
A
It is chemical because a gas, water vapor, is given off.
B
It is chemical because a new substance, saltwater, has been formed.
C
It is physical because it is easily reversible.
D
It is physical because the salt has turned into a gas.
*select an answer for all questions
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