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Chemistry Practice
Test Description: Chemistry Practice
Instructions: Answer all questions to get your test result.
1) Which of the following is an example of a physical change?
A
Mrs. Hoover holding an ice cube in her hand and it melting
B
all the above
C
metal on a car rusting
D
Jamesray burning a couch after the panthers win the super bowl
2) which of teh following is an example of a chemical change?
A
Butter melting on the table
B
Rose cutting and changing her hair color to purple
C
Cody setting off a bomb in Mrs. Hoover's class
D
all the above
3) Which of the following correctly describes a chemical change?
A
It is when it can change but is the same thing you started with
B
It is when it can change color
C
It is when it changes and you get a totally new substance
D
It is when it can change shape
4) Which of the following correctly describes a physical change?
A
It is when it releases a gas
B
It is when it gives off energy
C
It is when it can change but is the same thing you started with
D
It is when it changes and you get a totally new substance
5) What is the best example of a pure substance?
A
peanuts
B
carbon dioxide
C
gold
D
milk
6) Which best explains why the total mass of the products would be less than the total weight of the reactants after a chemical reaction?
A
atoms involved in the reaction lost mass
B
a physical change occurred
C
gases were released into the atomosphere
D
particles were created in the new solution
7) If a chemical reaction such as photosynthesis begins with 6 atoms of carbon, how many atoms of carbon should be in the products?
A
2 atoms of carbon
B
6 atoms of carbon
C
3 atoms of carbon
D
12 atoms of carbon
8) Which of the following shows one example of a chemical change and one example of a physical change?
A
freezing water and burning coal
B
boiling water and melting wax
C
rusting iron and baking a cake
D
dissolving powder and shredding paper
9) How does a balanced chemical equation satisfy the Law of Conservation of Mass?
A
during a chemical reaction, one or more substances are formed
B
during a chemical reaction, matter is destroyed
C
during a chemical reaction, the total number of atoms increases
D
during a chemical reaction, the total amount of matter stays the same
10) If I wanted to speed up a chemical reaction, which of the following would I use?
A
exothermic reaction
B
catalyst
C
endothermic reaction
D
inhibitor
*select an answer for all questions
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