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Which of the following is a chemical change?

A. Water freezing to form ice
B. Sugar dissolves in water
C. Gasoline burns in a car engine
D. A piece of metal expands when it is heated

1 Answer

6 votes

Answer:

C. would be the correct option.

Step-by-step explanation:

Burning gasoline is a chemical change because when gasoline is ignited, water and carbon dioxide are produced. Water freezing to form ice would be a physical change since its state of matter has changed, but not the water itself. Sugar dissolving in water is also a physical change because all it's really doing is just forming bubbles and changing the color. Choice D. would also be a physical change since the piece of metal is still a piece of metal, it just expanded when the temperature increased.

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