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Chemistry > physical vs chemical changes > Flashcards

physical vs chemical changes Flashcards

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1
Q

classify the following as being a physical or chemical change:
hydrochloric acid reactions with potassium hydroxide to produce a salt, water and heat.

A

chemical

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2
Q

classify the following as being a physical or chemical change:
a pellet of sodium is sliced in two

A

physicial

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3
Q

classify the following as being a physical or chemical change:
potassium chlorate decomposes to potassium chloride and oxygen gas.

A

chemical

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4
Q

classify the following as being a physical or chemical change:
iron rusts

A

chemical

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5
Q

classify the following as being a physical or chemical change:

when placed in H20, a sodium pellet catches on fire as hydrogen gas is liberated and sodium hydroxide forms

A

chemical

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6
Q

classify the following as being a physical or chemical change:

evaporation

A

physical

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7
Q

classify the following as being a physical or chemical change:

ice melting

A

physical

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8
Q

classify the following as being a physical or chemical change:

milk sours

A

chemical

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9
Q

classify the following as being a physical or chemical change:

sugar dissolves in water

A

physical

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10
Q

classify the following as being a physical or chemical change:

wood rotting

A

chemical

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11
Q

classify the following as being a physical or chemical change: cooking on a griddle

A

chemical

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12
Q

classify the following as being a physical or chemical change:

grass growing on a lawn

A

chemical

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13
Q

classify the following as being a physical or chemical change:

a tire is inflated with air

A

physical

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14
Q

classify the following as being a physical or chemical change:

food is digested in the stomach

A

chemical

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15
Q

classify the following as being a physical or chemical change:

water is absorbed by a paper towel

A

physical

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16
Q

classify the following as being a physical or chemical change:
sodium hydroxide dissolves in water

A

physical

Chemistry (4 decks)

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