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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
all the above
B
Mrs. Hoover holding an ice cube in her hand and it melting
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
Rose cutting and changing her hair color to purple
B
all the above
C
Cody setting off a bomb in Mrs. Hoover's class
D
Butter melting on the table
3) Which of the following correctly describes a chemical change?
A
It is when it can change shape
B
It is when it can change but is the same thing you started with
C
It is when it can change color
D
It is when it changes and you get a totally new substance
4) Which of the following correctly describes a physical change?
A
It is when it changes and you get a totally new substance
B
It is when it can change but is the same thing you started with
C
It is when it gives off energy
D
It is when it releases a gas
5) What is the best example of a pure substance?
A
gold
B
carbon dioxide
C
milk
D
peanuts
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
gases were released into the atomosphere
B
atoms involved in the reaction lost mass
C
a physical change occurred
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
12 atoms of carbon
B
3 atoms of carbon
C
2 atoms of carbon
D
6 atoms of carbon
8) Which of the following shows one example of a chemical change and one example of a physical change?
A
rusting iron and baking a cake
B
boiling water and melting wax
C
dissolving powder and shredding paper
D
freezing water and burning coal
9) How does a balanced chemical equation satisfy the Law of Conservation of Mass?
A
during a chemical reaction, matter is destroyed
B
during a chemical reaction, the total number of atoms increases
C
during a chemical reaction, one or more substances are formed
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
endothermic reaction
B
catalyst
C
exothermic reaction
D
inhibitor
*select an answer for all questions
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