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Introduction to Chemical Reactions

Posljednje ažuriranje almost 6 years ago

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Pitanje 1

1.

Define a chemical change.

Pitanje 2

2.

Which of the following are examples of a chemical property.

ability to burn

flammability

reactivity with acids

corrosive

reactivity with oxygen

Pitanje 3

3.

Which of the following indicate that a chemical change has taken place?

formation of a gas

bubbling

unexpected color change

unexpected formation of a solid in a liquid

precipitate forms

unexpected change in temperature

change from a liquid to a gas

Pitanje 4

4.

Which of following is an example of a chemical reaction?

freezing liquid Mercury

adding yellow to blue to make green

cutting a piece of paper into two pieces

adding baking soda to vinegar

filling a ballon with air

Pitanje 5

5.

Which of the following is a chemical reaction?

painting a wall white

a bicycle rusting

ice cube melting

writing with chalk on a blackboard

Pitanje 6

6.

Which of the following is NOT a chemical reaction?

shattering glass with a baseball

corroding metal

fireworks exploding

lighting a match

baking cookies

Pitanje 7

7.

What additional signs can you think of that might be evidence that a chemical change is taking place? Think about examples provided in this lesson.